Homebrew RF Circuit Design Ideas
http://www.qsl.net/va3iul/
Transceivers
Receivers
80m 5W CW Transceiver
7 MHz QRP Transceiver - DL5NEG
27 MHz R/C Transceiver
49 MHz Walkie-Talkie
432 MHz Data Transceiver
QRP SSB Transceiver
QRP Transceiver 40m/20m - IK3OIL
Short Range Wireless Data Communication
Transceiver QRP 20m SSB
HF Transceiver CW SSB NorCalSierra
Transceiver QRP 40m - F6BQU
Transceiver SSB with 9MHz-IF
20m Transceiver BITX - VU2ESE
40m - 20m Dual-band Transceiver - VU2ESE
10 GHz I/Q Transceiver - S53MV
7 MHz Transceiver - DK6SX
MIZUHO MX21S QRP Transceiver
HF SSB QRP Transceiver - YD1JJJ
40m CW QRP Transceiver - NT7S
Long Range FM Cordless Telephone
3.5 MHz 5W CW Transceiver - JF1OZL
14 MHz 10W SSB Transceiver - JF1OZL
21 MHz QRP SSB Transceiver - JF1OZL
40m SSB Transceiver Santerre - F6FEO
10MHz 1W Transceiver NE-QRP
20m CW Transceiver - 7N3WVM
20m QRP Transceiver - PA2OHH
40m SSB Transceiver PQDS - XQ5FOD
40m CW Transceiver - JG1EAD
20m SSB Transceiver - Taurus - SP5DDJ
80m CW Transceiver - Aquarius - SP5DDJ
VHF FM Transceiver - DF5FC
10m Transceiver MiniPIG - W8DIZ
80m CW Transceiver - Libra - SP5DDJ
30m CW Transceiver - 7N3WVM
50 MHz SSB/CW Transceiver - 7N3WVM
160m SSB Transceiver - G3TSO
20m CW Transceiver - K8IQY
30m PSK31 Transceiver - NN1G
30m CW Transceiver - K1SWL
40m CW Transceiver - K8IQY
50 MHz SSB Transceiver - KD1JV
75m QRP SSB Transceiver - WA7JHZ
80m All-BC547 SSB Transceiver - VK3AJG
PSK31 Transceiver - KD1JV
CB AM Receiver-Transmitter
10 MHz QRP Transceiver - PA2OHH
40m CW Transceiver - PY2MG
40m CW/DSB Transceiver - PY2MG
40m SSB Transceiver - PY2MG
80m Unichip Transceiver - G0UPL
HF Dual-Conversion Transceiver - YO3DAC/YO3BAL
20m CW Transceiver Norcal
30m CW Transceiver Norcal
40m CW Transceiver Norcal
20m or 30m Image-Rejection Transceiver Norcal-2030
10m CW Transceiver K8IQY
75m DSB Transceiver - KE7HR
14 MHz PSK31 Transceiver - K1SWL
80m DSB Transceiver - PA3ANG
430 MHz SSB Transceiver - JF1OZL
27 MHz Walkie-Talkie
40m-20m CW Transceiver - LZ3AI
80m All-2N2222 CW Transceiver - OK2BEU
144 MHz QRP CW Transceiver
144 MHz Simple Walkie-Talkie
144 MHz AM Walkie-Talkie - YO3AVE
2m PLL FM Transceiver - DC1YB
20m CW Transceiver - DC1YB
144 MHz 2-channels Walkie-Talkie - DC1YB
7 MHz CW Transceiver - W7EL
20m Bell-Ringer CW Transceiver - AA1TJ
50 MHz FM Transceiver for Audio and Data
80m CW QRP Transceiver
10m SSB Transceiver
20m SSB 50W Transceiver - YO3AVE
10.1 MHz 2W Transceiver - DJ1ZB
15m QRP 1.5W Transceiver - W9SCH
20m 1.5V Low Supply Voltage Transceiver - DL2AVH
20m Superheterodyne Transceiver - NN1G
20m Two-Fer Transceiver - WU2J
30m "38-Special" Superhet Transceiver - AC6AN
40m 1.5W Rock-Steady Transceiver - K8IF
40m DB-25 QRP Transceiver - WA5JAY
40m "EverReady" Transceiver - WA6AHL
40m "Forty-9er" Transceiver - N6KR
40m Handbook Transceiver - WB6TMH
40m QRP Transceiver - N4HCJ
40m QRP Transceiver - W3TS
80m-40m-30m Superhet Transceiver - NN1G
80m CW-QSK Transceiver - NN1G
80m One-Transistor CW Transceiver - WB3EEL
80m SMD Transceiver - W1CFI
HF QRP 1.5W Transceiver - KN1H
HF "The-Phoenix" QRP Transceiver - W3TS
30m QRP Transceiver - K8IF
1.8 MHz QRP Transceiver - G3TXQ
80m/160m Transceiver - G4ENA
20m 5W SSB/CW Transceiver MFJ-9420
40m / 20m RockMite CW Transceiver - K1SWL
1.8MHz Transceiver - G3TXQ
20m Transceiver - G4ENA
2m AM Walkie-Talkie Fredbox - G3XBM
10m CW Transceiver - G3XBM
27 MHz 3xBJT's Walkie-Talkie
27 MHz 4xBJT's Walkie-Talkie
27 MHz AM 6W Transceiver
27 MHz Saturn Walkie-Talkie
80m QRP Transceiver - YC3LSB
80m SSB Transceiver - YC3LSB
40m Mizuho DC7d CW Transceiver
40m Mizuho DC7x CW Transceiver
80m Transceiver MKARS - G6ALU
15m HiMite Transceiver - K1SWL
40m SSB Transceiver - JG1EAD
50 MHz AM Transceiver - JG1EAD
144 MHz FM Transceiver - JG1EAD
144 MHz SSB Transceiver - JG1EAD
430 MHz AM Transceiver - JG1EAD
14 MHz SSB/CW QRP Transceiver - W7ZOI
20m QRP SSB Transceiver - KD1JV
15m SSB Transceiver - WA4ZXF
80m Direct Conversion Transceiver - DK7JD
40m QRP KN-Q7 Transceiver - ZL2PD
80m ROSE-80 CW Transceiver - N1HFX
20m PSK-20 Transceiver - DL2FI
50 MHz Mini-Transceiver - JK1OLP
144 MHz DSB Transceiver - JH5TBS
2m Transceiver Front-End - DF5SL
40m CW SPATZ Transceiver - DK1HE
20m 3W Transceiver - S54S
50 MHz SSB/CW Transceiver - S54S
80m QRP CW/SSB Transceiver - S54S
80m QRP SSB Transceiver - SP5AHT
144 MHz FM Transceiver - DG0ZB
432 MHz Handheld Transceiver - DB1NV
HF Mini-Transceiver JEDREK
HF Transceiver SW Receiver - DK1HE/DL2FI
IQ Transceiver with AD831 - DL7IY
9 MHz SSB Transceiver IF - DL6HA
144 MHz SSB-FM Transceiver - DC6HL
3.5 MHz and 14 MHz SSB 2W Transceiver - HA8RM
20m 4W QRP Transceiver
HF SSB/CW Transceiver - DK3SP
40m ET-1 One-FET Transceiver - W2UW
40m SST-1 QRP Transceiver - W9ZTK
80m QRP Transceiver - K4DHC
14 MHz SDR QRP Transceiver - 4Z5KY
18 MHz I/Q Transceiver
Phased Direct Conversion Transceiver
3.5 MHz to 10 MHz Superheterodyne Receiver
7 MHz Direct Conversion Receiver
20m Direct Conversion Receiver
27 MHz R/C Receiver
80m/40m Direct Conversion Receiver
80m Superheterodyne Receiver
Aircraft Receiver 118 MHz to 136 MHz
AM Superheterodyne Receiver with NE612
Shortwave AM Receiver
2 Bands Shortwave AM Receiver
HF Receiver SSB Superheterodyne
Receiver HF SSB CW Superheterodyne
144 MHz SSB Receiver - W1VT
Two-stages HF Regenerative Receiver
80m/40m IQ Receiver - AK4AA
40m Direct Conversion Receiver - VU2ESE
1.8 MHz to 14.5MHz Direct Conversion Receiver
432 MHz FM Receiver - DF2FQ
HF Receiver - WN5Y
144 MHz FM Receiver
FM Receiver for Airband 137 MHz
14.070 MHz PSK31 Receiver - DL6FAP
20m PSK31 Receiver - DG2SK
Ten-Tec 1253 Shortwave Receiver
Direct Conversion Receiver with MOSFETs
HF Direct Conversion Receiver - VU2UPX
HF Receiver with MC3362 - VU2UPX
40m Binaural I/Q Receiver - KK7B
Two Regenerative Receivers
40m SOP Receiver - N2CX
Clasic40 Receiver - KK7B
Herring HF Receiver - WA1LNQ
Receiver for DRM - Digital Radio Mondiale - DL5MGD
Receiver for 80m and 20m - OK2UGS
Weather Receiver 137 MHz - F6BQU
144 MHz FM Receiver - PU2XJE
Simple VHF FM Receiver
Regenerative FM Receiver
80m SSB Super-80 Receiver - VK3YE
VHF Receiver PLL - DF1FO
Superregenerative HF Receiver
Superregenerative VHF Receiver
Receiver HF/VHF-AM/FM/SSB Grundig YB400
30m "Dirty-Thirty" Receiver - VE7BPO
FM Broadcast Receiver TDA7000
General Coverage AM Receiver - ON6MU
Direct Conversion Receiver AM-Immune - KD1JV
Short-Wave AM Receiver - KD1JV
3x2N2222 Short-Wave AM Receiver
40m 3xFET Direct Conversion Receiver
40m Software Defined Radio - PY2MG
80m Direct Conversion Receiver - PA2OHH
HF AM/SSB Receiver - PY2MG
Short-Wave Regenerative Receiver - PA2OHH
VHF FM Receiver - PY2MG
CB Receiver TCA440
20m SSB Receiver
118 MHz to 136 MHz Aviation Band Receiver
Superregenerative RX for 144-432-1296 MHz - F9HX
FM Receiver with Strength-meter
Economy Short-Wave Receiver
2m AM Receiver
20m Direct Conversion Receiver - W1VD
40m AM/CW/SSB Regenerative Receiver
80m Two CW/SSB Superheterodyne Receivers
80m SSB/CW/AM Superheterodyne Receiver
80m Receiver IF=9MHz
144 MHz All-FET Direct Conversion Receiver
144 MHz SSB/CW Direct Conversion Receiver
144 MHz Superregenerative Receiver
432 MHz SSB/AM Receiver - YO3AVE
FM Direct Conversion Receiver
PNP Shortwave Receiver
Simplest Direct Conversion Receiver
VHF Superregenerative Receiver
HF MultiPig Receiver - W8DIZ
0.3 MHz - 30 MHz SSB/AM Receiver - DC1YB
40m Parametric-Regenerative Receiver - AA1TJ
HF Simple Regenerative Receiver - N1TEV
40m Direct Conversion Receiver - DL2YEO
80m All-BJT's Direct Conversion Receiver
30m SSB Superheterodyne Receiver
40m CW-SSB Simple Superhet Receiver
80m-40m Direct Concersion Receiver - VK3AWC
All HF Bands Direct Conversion Receiver
410 MHz - Superregenerative Receiver for Remote Keyless
FM Broadcast Superregenerative Receiver - VK2ZAY
Simplest Shortwave Receiver
VHF Superregenerative Receiver - VK2ZAY
136 MHz Airband Dual-Conversion Receiver
FM / AM Superregenerative Receiver
VHF Superregenerative Receiver with Squelch - N1TEV
1 MHz - 30 MHz QRP Receiver - KD1JV
14 MHz Simple Superhet Receiver - W7ZOI
20m Two-Superhet's Receivers - K9AY
40m Superhet Receiver with 74HC4053 - KD1JV
40m CCS Superhet Receiver - WB0RMT
40m "Tuna-Twin-Too" Receiver - KO4WX
Shortwave "PipSqueak" Receiver - NA5N
3 MHz - 5 MHz Cascade Regenerative Receiver - WD5HOH
3 x Superregenerative Receivers - RSGB
40m MRX-40 Receiver - K8IDN
Multiband HF Direct Conversion Receiver - RSGB
7 MHz Rock-Bending Receiver - WI5W
HF MicroR2 SSB/CW Receiver
HF DCR Polyphase Receiver - G0UPL
AM Receiver with PLL - 4046
Medium Wave Receiver for DX
Short Wave AM Receiver with TCA440
Regenerative Short-Wave Receiver - NA5N
80m AM/CW/SSB Receiver - YC3LSB
80m AM/SSB Receiver - YC3LSB
2.5 MHz Receiver for OMA-2500 station
FM Receiver with Auto-scan
220 MHz to 400 MHz Air-band Scanner
HF Regenerative Receiver with Dual-Gate MOSFET
Simple FM Receiver with Audio Amplifier
6m / 2m FM Receiver
20m DCR with Active Filter
80m / 40m DCR Receiver
80m One-Stage-IF Superhet Receiver
Active Aircraft AM Receiver
FM Broadcast Superhet Receiver
Public Service FM Receiver
Short-Wave Superhet Receiver
Very Low Frequency Whistler Receiver
Single-Signal Direct Conversion Receiver - KK7B
7 MHz AM/SSB/CW Receiver - VU3NSH
HF I/Q SDR Receiver DR2 - YU1LM
HF/VHF/UHF I/Q SDR Receiver AR1-1 - YU1LM
0.1 MHz - 30 MHz AM/SSB Receiver - 4Z5KY
HF Direct Conversion Receiver - YU1LM
136 MHz AM Airband Dual-Conversion Receiver
144 MHz Super-Regenerative Receiver
7 MHz Direct Conversion Receiver - EA1RCT
40m CW Receiver - DK6SX
7MHz Direct Conversion Receiver - DG2XK
80m PSK31 Receiver - DM2CQL
137 MHz - 141 MHz Weather Receiver - OK2UGS
144 MHz 3ch FM Receiver - DJ9HH
FM Receiver with PLL - DH1AAD
HF Direct Conversion for SoftwareRadio - DK3WX
Simple Two-IC Direct Conversion Receiver
80m Unconventional Receiver - DL1XR
DRM Receiver - DL5CM
DRM Receiver - DM2CWG
FM-SSB Receivers with TA7358
0.1 MHz - 32 MHz Superhet-IQ Receiver - DL7LA
7 MHz JUMA-RX1 - DL1DMW
40m / 20m Superhet-Direct Conversion Receiver - DL1DH
50 MHz SDR - DM2CQL
80m / 40m SDR - DM2CQL
80m / 49m / 40m SDR - DL7LA
80m SSB Receiver - DL1DH
144 MHz Fox-Hunt Receiver - DF1FO
HF Superhet Receiver - DL1DH
MW Receiver - DL1XR
SDR SoftRock - KB9YIG
80m Fox-Hunt SSB Receiver
144 MHz AM Receiver - DC9MD
144 MHz FM Receiver RSGB
80m / 40m Neophyte Receiver - WA3RNC
88 MHz - 108 MHz Direct Conversion Receiver
Shortwave All-Transistors Direct Conversion Receiver
MW and SW Simple Receiver
Regenerative SW Receiver - 7N3WVM
Shortwave Old-Style Receiver
0.1 MHz - 30 MHz AM/FM/CW/SSB/DRM Receiver
7 MHz Crystal Regenerative Receiver - KR1S
HF DRM Receiver - OK2UGS
5-band Short Wave SSB-AM Receiver
XCR-30 Short Wave SSB-AM Receiver
HF CW Storm-2 Receiver - DK3RED
Very Low Frequency Receiver - WA8SME
HF CW-SSB Regenerative Receiver - N1TEV
Short-Wave Junk-Box Regenerative Receiver - N1TEV
80m One-Band, One-Transistor Radio - WB2EUF
Sudden HF Direct Conversion Receiver - G3RJV
80m "The Traveler" SSB Receiver - K5WMS
Short Wave "Armstrong" Regenerative Receiver - KC3ZQ
Tuned Diode Receivers - K1CLL
1 kHz to 7 kHz VLF Receiver
40m Regenerative Receiver - VK3IQ
4 MHz to 26 MHz "Goof-Proof" Regenerative RX - WB0NQM
40m Simple Superhet Receiver - AA1TJ
WWV HF Receiver
5.5 MHz to 16 MHz Short-Wave Receiver
30 kHz to 70 MHz SDR - YU1LM
HF DCR with SMT Components
7 MHz S7C Superhet Receiver
HF I/Q Direct Conversion Receiver
High Performance HF Direct Conversion Receiver
10W 40m CW Transmitter
2m Band Beacon
Beacon for 144 MHz
Beacon for VHF
HF QRP CW Transmitter
VHF Beacon
Wireless AM Microphone
X-tal VHF FM Transmitter
7 MHz CW QRP Transmitter
14 MHz CW QRP Transmitter
145 MHz X-tal FM Transmitter
27 MHz AM/FM Transmitter
HF QRP CW Transmitter VXO - W7ZOI
FM Audio Transmitter with Monitor
0.5W FM Transmitter 88MHz-108MHz
7 MHz 5W QRP Transmitter
7 MHz 12W Transmitter - NB6M
10m VXO QRP Transmitter - NB6M
27 MHz 2W Transmitter
40m 5W CW Transmitter - N1HFX
75m Phasing SSB Exciter - WA7JHZ
Miniature Tracking Transmitter
4W PLL FM Transmitter - XQ5FOD
20m 1W Transmitter - PA2OHH
40m CW Transmitter - PY2MG
HF SSB Exciter - KD1JV
3 GHz Beacon - G4DDK
5.7 GHz Beacon - F6BVA
SHF Micro-beacon - F4BAY
6m CW Transmitter - VE7GC
1W HF CW Transmitter
50 MHz QRP AM Transmitter
80m-40m 6W CW Transmitter
80m Beacon
144 MHz 1W FM Transmitter
144 MHz AM/FM VFO Controlled Transmitter
144 MHz Low Power Beacon - YO3AVE
432 MHz CW Transmitter
432 MHz QRP FM Transmitter
1296 MHz Simple Transmitter
QRP Transmitters
1.65 MHz QRP AM Transmitter
88 MHz - 108 MHz FM Transmitter
HF Low-Power AM Transmitter
88 MHz - 108 MHz X-tal controlled 1W FM Transmitter
30m CW Transmitter
80m CW VFO Transmitter
VLF 15W Transmitter
9 MHz SSB Modulator
88 MHz - 108 MHz 0.5W FM Transmitter
High-Quality AM Transmitter
27 MHz 4W AM Transmitter
2W Two-Bands Transmitter - VK3XU
7 MHz QRP VFO Transmitter - W7ZOI
14 MHz 1W VFO Transmitter - W8PJ
40m QRP CW Transmitter - WB8VGE
40m The-QRP-Key Transmitter - WA8MCQ
All-Bands VXO Transmitter - KN1H
2m Low-Power CW Beacon
9 MHz SSB Modulator Phasing-Method - RSGB
SSB Modulators Filter-Method - RSGB
88 MHz - 108 MHz 25mW FM Transmitter
88 MHz - 108 MHz 20W FM Transmitter
40m MicroT2 SSB/CW Transmitter
HF MKII All-Band CW Transmitter
88 MHz - 108 MHz 20W PA - ON6MU
80m Fox Beacon
AM Broadcast mini-Transmitter
SSB Generator - JG1EAD
1 MHz - 500 MHz Multimode Phasing Exciter - KK7B
2.32 GHz 0.7W Beacon - LA3UHH
27 MHz QRP AM Transmitter
Simple FM Sender MAX2606
144 MHz Fox-Hunt Transmitter
144 MHz CW-AM-FM QRP Transmitter - DJ8PG
144 MHz FM-AM Transmitter - DL3WR
144 MHz Transmitter - DC9MD
144 MHz 1W NBFM Transmitter
144 MHz 5W SSB TX - DJ9ZR
6m Beacon - WB2AMU
144 MHz 350mW Beacon - 9A4QV
10 GHz Beacon - W1GHZ
88MHz to 108 MHz Low Power Transmitter
10m SSB Transmitter - NZ5G
10 MHz 3W CW Transmitter - WB6VGE
50 MHz DSB Transmitter - KL7GLK
7 MHz 2.2W CW Transmitter
7 MHz 123mW CW Transmitter
14 MHz 4W VXO Transmitter
Phased SSB Exciter
SSB Generator
1.3 GHz Transverter - DB9LN / DB6NT
2.3 GHz to 144 MHz Transverter - DB6NT
5.7 GHz Transverter - DB6NT
10 GHz to 144 MHz Transverter - DB6NT
50 MHz Transverter - OE9PMJ
144 MHz to 28 MHz RX Converter MOS
144 MHz to 28 MHz RX Converter FET
VHF to 1.3 GHz up-converter
1296 MHz to144 MHz Transverter - F5LGJ
10 GHz Transverter
70 MHz to 28 MHz Transverter - OZ2M
No-Tune Transverter 1.3 GHz to 144 MHz - KK7B
No-Tune Transverter 2304 MHz to 144 MHz - W8NLC
Javornik 144 MHz to 14 MHz Transverter - S53WW
50 MHz junk-box converter - WA3ENK
50 MHz to 28 MHz Transverter - DK7ZB
50 MHz to 28 MHz simple Converter
144 MHz to 28 MHz Transverter
Very Low Frequency Converter 0-250 kHz to 3.5 MHz
UHF to VHF TV Converter
144 MHz to 28 MHz Receive Converter - N0GZ
1296 MHz Transverter - W1GHZ
144 MHz to 28MHz Transverter - LT2S
23cm to 70cm Transverter - I2SG
144 MHz to 2.4 GHz Upconverter
1.3 GHz to 144 MHz Transverter - OE9PMJ
2.3 GHz Transverter - DC8UG
5.7 GHz ATV Converter - DL1IN
70 MHz to 21 MHz Transverter - DF2FQ
2.32 GHz to 144 MHz Converter - DL5NEG
40m to 11m Transverter - PY2MG
50 MHz to 28 MHz RX Converter - PY2MG
All-Bands HF to 9 MHz IF Transverter - YO3DAC/YO3BAL
144 MHz to 14 MHz Transverter - SM0VPO
2.3 GHz ATV Upconverter - F1HPR
2.3 GHz to 432 MHz Converter - DL5NEG
144 MHz to 28 MHz Transverter - WA6CDR
868.3 MHz to 144 MHz Transverter - F1JGP
1296 MHz to 144 MHz Transverter - F1OPA
0-550 kHz Very Low Frequency Converter
1.3 GHz ATV Downconverter
1.8 MHz to 28 MHz Transverter - YO2IS
24 MHz to 7 MHz Receive Converter
28 MHz to 432 MHz Linear Up-Converter
144 MHz to 14 MHz Transverter
144 MHz to 28 MHz RX Converter - YO3BAL / YO3DAC
144 MHz to 28 MHz Converter
2m to 10m RX Converter
144 MHz to 1296MHz Up-Converter
432 MHz to 28 MHz RX Converter
432 MHz to 50 MHz Transverter
432 MHz to 144 MHz RX Converter - YO3BAL
432 MHz to 144 MHz Downconverter
432 MHz to 144 MHz Transverter
1296 MHz to 144 MHz Receive Converter
28 MHz to 50 MHz Transverter - RSGB
136 kHz to 4.137 MHz Transverter - RSGB
50 MHz to 27 MHz Transverter - YC3LSB
80m to 40m Transverter - YC3LSB
27 MHz to Short Waves Converter
AM Air-Band to Short Waves RX Converter
144 MHz to 6 MHz Converter
144 MHz to 10.7 MHz Downconverter
144 MHz to 10.7 MHz VFO Converter
50 MHz RX Converter - JR1PWZ
144 MHz to 50 MHz Transverter - DG0ZB
432 MHz to 28 MHz Transverter - DJ8ES
Multiband Receive Converter - DL2JSH
Weather Satellite Converter
10.95 GHz to 950 MHz LNA/Downconverter - YU3UMV
69 MHz to 5.5 MHz Converter - DG0ZB
70/50 MHz to 28 MHz RX Converter - DL7HG
432 MHz to 144 MHz Transverter - DF5SL
Dual-Band Up-Converter - DL7VFS
14 MHz to 9 MHz Tuned Transverter - DL6HA
14 MHz to 144 MHz Upconverter - DL6HA
28 MHz to 432 MHz Upconverter - DJ6ZZ
144.3 MHz High Selective Converter - DL1LS
144 MHz to 432 MHz Upconverter - DL6MH
144 MHz to 14 MHz RX Converter - DL6HA
432 MHz to 144 MHz RX Converter - DL9FX
1296 MHz to 144MHz RX Converter - DL9JU
2304 MHz to 144 MHz Converter - DJ1EE
Simple VHF-to-HF Converter
28 MHz to1296 MHz Upconverter - DF8QK
144 MHz to 1296 MHz TX Upconverter - DC8UG
144 MHz Converter MOS LNA - DC0DA
1296 MHz to 144 MHz RX Converter - DJ5XA
2304 MHz to 144 MHz RX Converter - DC0DA
2305 MHz to 144 MHz RX Converter - DL2AS
144 MHz to 28 MHz Transverter - DK8DD
432MHz_28MHz_Transverter - DJ3VY
1296 MHz to 144 MHz RX Converter - PA2HWG
1296 MHz to 144 MHz SSB Transverter - DJ1EE
144 MHz to 9 MHz Receive Converter - DJ9ZR
144 MHz to 28 MHz Receive Converter - DL6SW
432 MHz to 144 MHz Receive Converter - DL9GU
432 MHz to 144 MHz Transverter - DL9JU
1296 MHz to 28 MHz Receive Converter - DL3WR
1.3 GHz to 432 MHz Receive Converter - DJ8ES
1.6 GHz to 134 MHz Receive Converter - DF9DA
432 MHz Receive Converter - DD2EK
C-band to S-band Receive Converter - YT3MV
902 MHz to 28 MHz Receive Converter - W0PW
1296 MHz to 28 MHz Receive Converter - W0PW
220 MHz to 144 MHz Transverter - WA7SPR
1296 MHz Receive Downconverter - WB6IGP
152 MHz to 144 MHz Receive Converter - W9DJZ
5.6 GHz to 144 MHz Receive Converter - WB6IGP
50 MHz to 1.6 MHz Receive Converter - K1CLL
144 MHz to 14 MHz Receive Converter - WB6BIH
10.1 MHz to 4 MHz Low-Noise Converter
HF 10W Power Amplifier
50MHz 100W Power Amplifier
50MHz 350W Power Amplifier 2xBLX15
3 MHz to 30 MHz 80W Power Amplifier
144 MHz 125W Power Amplifier
HF 60W Power Amplifier IRF840
HF 10W to 200W Class E/F Power Amplifier
14 MHz 20W Linear Power Amplifier
144 MHz 100W Power Amplifier
144 MHz 180W Power Amplifier
432 MHz 50W Power Amplifier
432 MHz 110W Power Amplifier
144 MHz 75W PA with RX preamplifier
144 MHz 110W Linear PA
28 MHz 150W Power Amplifier
144 MHz 200W PA with RX preamplifier
HF PA's with MOSFETs - DK7ZB
50 MHz 35W PA with MOSFET - DJ9FG
HF 40W PA with MOSFET - WA2EBY
88-108 MHz 40W FM Power Amplifier
144 MHz 100W Push-Pull PA - YU1AW
UHF 25W Power Amplifier
VHF 30W Power Amplifier
HF 10W MOSFET PA - LU8EHA
HF 8W Power Amplifier - F6BQU
80m 5W Power Amplifier - S57NAN
2304 MHz 2.5W Power Amplifier - WA3JUF
50 MHz 350W Power Amplifier - 2xBLX15
3.4 GHz 3W Power Amplifier - DB6NT
3.4 GHz 7W Power Amplifier - DB6NT
10 GHz 4W Power Amplifier - DB6NT
1296 MHz 50W Power Amplifier - DJ1EE
70 MHz 160W Power Amplifier - GI0GDP
144 MHz 160W Power Amplifier
144 MHz 100W Linear Power Amplifier
HF 7W Power Amplifier - ON6MU
50 MHz 150W Power Amplifier 1xBLX15
144 MHz 100W Power Amplifier 2xBLY94
40m 10W Power Amplifier - PY2MG
80m/40m 30W Power Amplifier - PY2MG
1.6 MHz - 30 MHz 300W Power Amplifier 2xBLF177
14 MHz 25W 2x MOSFET Power Amplifier - F6BCU
28 MHz 80W SSB Power Amplifier BLF246
88 MHz - 108 MHz 15W FM MOSFET Power Amplifier
100 MHz - 450 MHz 250W Power Amplifier BLF548
27 MHz 1kW Low Cost MOSFET Power Amplifier
27 MHz 500W Class-E MOSFET Power Amplifier
50 MHz 300W Linear MOSFET Power Amplifier
88 MHz - 108 MHz 300W MOSFET Power Amplifier
144 MHz 50W Power Amplifier - M0UKD
2.3 GHz 1.5W Power Amplifier - F1JGP
2.3 GHz 4W Power Amplifier - F5EFD
2.3 GHz 10W Power Amplifier - F1JGP
5.7 GHz 0.5W Power Amplifier - F1HPR
5.7 GHz 4W Power Amplifier - F1JGP
10 GHz 1W Power Amplifier - F1JGP
24 GHz 80mW Power Amplifier - F1GHB
1.3 GHz 1W Power Amplifier - IW2BC
HF 600W MOSFET Power Amplifier
HF 180W Power Amplifier
1 MHz to 30 MHz 5W Power Amplifier
1.8 MHz to 30 MHz 15W Power Amplifier - W8DIZ
10 MHz to 90 MHz 1kW MOSFET Power Amplifier
225 MHZ 450 MHz 10W Power Amplifier
70 MHz 150W Power Amplifier - YU1AW
135 MHz - 175 MHz 7W Power Amplifier
135 MHz - 175 MHz 15W Power Amplifier
400 MHz - 520 MHz 8W Power Amplifier
1.78 GHz Class-F Power Amplifier
1 GHz Inverse-Class-F Power Amplifier
13.56 MHz 400W Class-E Power Amplifier
27 MHz 500W Class-E Power Amplifier
144 MHz 55W Class-E Power Amplifier
Cascode CMOS Class-E Power Amplifiers
Class-F LDMOS Power Amplifier
Equivalent Circuits Class-E PA
VHF Class-E Power Amplifier
2 MHz - 50 MHz 1kW MOSFET PAs
30 MHz 300W MOSFET Power Amplifier
VHF 150W MOSFET Power Amplifier
VHF-UHF Broadband 100W Power Amplifier
VHF 80W FM Power Amplifier
HF 10W Power Amplifier - KD1JV
1 MHz - 30 MHz 150W Linear Power Amplifier
28 MHz 100W Linear Power Amplifier
7 MHz 200W Class E/F MOSFET PA - KN6EK
HF 30W Class-D Linear Power Amplifier - OH2GF
1450 MHz - 1550 MHz 45W LDMOS Power Amplifier
HF Solid-State QRP Power Amplifiers
HF 250W LDMOS Power Amplifier
1.8MHz to 10.1MHz 5W MOSFET Power Amplifier
50MHZ 16W MOSFET Power Amplifier
88 MHz - 108 MHz 175W Power Amplifier
HF 100W Power Amplifier - IRF520
80m 8W Linear PA - YC3LSB
27 MHz 4W Power Amplifier
1.8 MHz to 30 MHz 10W with IRF510 Power Amplifier
1.8 MHz to 30 MHz 10W MOSFET Power Amplifier
2.4 GHz 0.5W GaAs FET Power Amplifier
432 MHz 40W DMOS Push-Pull Power Amplifier
432 MHz 125W DMOS Push-Pull Power Amplifier
500 MHz 15W DMOS Power Amplifier
VHF 150W DMOS Power Amplifier
VHF 300W DMOS Push-Pull Power Amplifier
14 MHz 100W 2SK413-MOSFET PA - RSGB
HF 150W MOS-IRF510 Power Amplifier - UA1ZH
120 MHz to 180 MHz Class-E Power Amplifier
225 MHz to 400 MHz 20W LDMOS Power Amplifier
480 MHz to 520 MHz Class-E Power Amplifier
500 MHz Class-F Power Amplifier
1.2 GHz 10W 2nd Harmonic Resonator Power Amplifier
1.78 GHz 10W LDMOS Power Amplifier
14 MHz 100W HEXFET Class-E Power Amplifier
Current-Switching Class-D LDMOS Power Amplifier
50 MHz 40W MOSFET Power Amplifier - DJ9FG
1.8 MHz - 30 MHz 250W IRF820 Power Amplifier - DK6AE
2.4 GHz 2W Power Amplifier - DG0OPK
1.8 MHz - 54 MHz 6W Power Amplifier - DL2EWN
1.8 MHz - 54 MHz 400W MOS Power Amplifier - OE2KHM
432 MHz 15W Power Amplifier - DJ1EE
1296 MHz 1W Linear PA - DC0DA
1.3 GHz 10W Linear PA - DJ1EE
1 MHz to 30 MHz 4W Linear PA - DJ7VY
2.4 GHz 1W Linear PA - DC3QS
1296 MHz 10W Linear Power Amplifier - DJ1EE
1.3 GHz 0.5W Power Amplifier - DC1OP
3.4 GHz 0.5W Power Amplifier - DC8NR
10 GHz 1W Power Amplifier - DL1RQ
24 GHz 200mW Power Amplifier - DB6NT
1 MHz to 60 MHz +23dBm Driver DK4KU
HF 50W MOS Power Amplifier - W6JL
HF 50W Gain=13dB Power Amplifier - WA2EUJ
HF 50W 2xIRF520 Power Amplifier - NM0S
144 MHz 50W Parallel-BJT Power Amplifier
28 MHz 15W Power Amplifier
40m 75W CW Power Amplifier - W6EI
40m 200W CW Power Amplifier - W6EI
10m 10W SSB Power Amplifier - NZ5G
40m QSK 40W Power Amplifier - N5HNN
144 MHz 25W Power Amplifier - WA1GPO
7 MHz 30W HEXFET Power Amplifier
14 MHz - 21 MHz 5W HEXFET Power Amplifier
HF 30W FET Push-Pull Power Amplifier - AA3X
50 MHz 3W Power Amplifier
2.4 GHz LNA 30dB-Gain 0.6dB-NF
10 GHz Low Noise Amplifier
144 MHz GaAs LNA
144 MHz LNA - YU1AW
432 MHz LNA MGF1402
432 MHz LNA - YU1AW
950 MHz to 2150 MHz LNA
1296 MHz Low Noise Amplifier
Antenna Preamplifier 100 kHz to 220 MHz
UHF TV Preamplifier 25dB Gain
LNA for UHF Band BFP540
High IP3 HF LNA
L-band Low Noise Amplifier
950 MHz - 2150 MHz LNB
HF Preselector - DL2JDN
3.5 GHz PHEMT LNA 0.9dB NF
10 GHz GaAs LNA - N1BWT
24 GHz HEMT LNA - WA3RMX
432 MHz GaAs LNA - N6CA
1.3 GHz LNA - PE1BVJ
2.4 GHz LNA +40dBm OIP3
100 MHz to 500 MHz LNA
800 MHz to 1000 MHz BJT LNA
900 MHz BJT LNA
900 MHz High Linearity pHEMT LNA
2.4 GHz LNA, 1.1dB-NF, +10dBm-IP3
2.4 GHz LNA 0.6dB-NF, 15dB-Gain
5.7 GHz LNA 1.2dB-NF, 15dB-Gain
50 MHz Low Noise FET Preamplifier - W1FB
432 MHz pHEMT LNA 0.4dB-NF - JH0WJF
HF High Dynamic Range LNA
VHF-UHF GaAs LNA - W3KKC
88MHz-108MHz Cascode LNA
Short-Wave Tunable Preamplifier
2.4 GHz 0.5dB-NF pHEMT LNA
400 MHz LNA BFG540
Wideband 432 MHz to 1296MHz pHEMT LNA - G0MRF
900 MHz LNA BFG505
Wideband pHEMT LNA - W6PQL
1296 MHz Very Low Noise Amplifier - G4DDK
2304 MHz Very Low Noise Amplifier - G4DDK
1296 MHz BJT Low Noise Amplifier - WA6UAM
2.4 GHz LNA - F5JGP
1296 MHz LNA - F1JGP
70 MHz to 560 MHz Wideband High-Dynamic-Range LNA
100 kHz to 600 MHz Wideband Linear Amplifier
HF Receive Loop Antenna Preamplifier
1 MHz to 100 MHz Dual-Stage LNA
40 MHz to 800 MHz Gain=28dB LNA
144 MHz BF981 LNA
144 MHz Tuned LNA
400 MHz to 800 MHz Gain=30dB LNA
All-Bands Preselector
1.3 GHz GaAs-FET Low Noise Preamplifier - OH3MCK
GPS 1.575 GHz, G=18dB, NF=1.3dB LNA
2140 MHz G=15dB, NF=1.5dB GaAs LNA
1 MHz - 30 MHz Ultra High Dynamic Range LNA - YU1AW
2.4 GHz two-LNA's for Active Antenna
10.24 GHz GaAs LNA's
900 MHz G=22dB, NF=1.9dB, BJT LNA
50 MHz Dual-Gate LNA - OH2AUE
1.5 MHz - 50 MHz LNA+PA - YU1LM
900 MHz Integrated Cascode LNA
2.4 GHz, NF=1.5dB, G=14dB, HJ-FET LNA
L-Band pHEMT LNA
Voltage Probe Antenna Preamplifier - VE7BPO
High-Dynamic Range Preamplifier - G3SBI
1.8 MHz to 54 MHz Preselector MFJ-1040
Medium Wave Active Antenna
10 kHz - 30 MHz Antenna Preamplifier
HF Active Loop Antenna
1 GHz to 8 GHz Cascode LNA
2 GHz LNA with Tunable Image Reject Filter
7 GHz Low Noise Amplifier
40 MHz to 800 MHz CATV LNA
CATV Line-out Amplifier
VHF Active Antenna
Broadband J-FET Differential Amplifier
144 MHz MOS and FET Equiv LNA - RSGB
FET-BJT Cascode LNA
High-IP3 HF LNA - RSGB
50 MHz BFPxxx LNA - YU1AW
70 MHz BFPxxx LNA - YU1AW
144 MHz BFPxxx LNA - YU1AW
144 MHz Dual-Gate LNA - YU1AW
432 MHz Dual-Gate LNA - YU1AW
1 kHz to 12 GHz Wideband LNA
Push-Pull HF Active Antenna Circuit - DJ2LR
88 MHz - 108 MHz FM-band Low Noise Amplifier
1.3 GHz LNA
7 MHz Multi-Q Preselector - DK2AG
144MHz - 432 MHz LNA - DH7FB
High-IP3 Differential LNA - DL7VFS
Long Waves Preselector - DL6UU
1296 MHz LNA - DJ1EE
3-stages 1296 MHz LNA - DC0DA
144 MHz & 432 MHz High Linearity LNA - DJ7VY
1.3 GHz 0.25dB-NF 16dB-Gain LNA - DF7KB
1.7 GHz 1dB-NF 14dB-Gain LNA - DJ6PI
1.7 GHz 2dB-NF 23dB-Gain LNA - DJ6PI
23cm and 13cm Dual-Stage LNA - DJ6PI
144 MHz 0.5dB-NF LNA - DF9RL
144 MHz High-Gain LNA with PIN-attenuator - DK1OF
432 MHz 0.7dB-NF LNA
432 MHz Dual-Gate LNA - DF7KB
1296 MHz Selective LNA - DC8UG
144 MHz, 220 MHz, 440 MHz LNA - W3KKC
1.5 GHz LNA - YT3MV
1.150 GHz Coaxial Resonator LNA - DB1NV
5.76 GHz Gain-50dB Amplifier - DL1RQ
100 kHz to 50 MHz Active Antenna
144 MHz Dual-Gate LNA
144 MHz Helical LNA - YU1AW
C-Band GaAs LNA - YT3MV
HF Preselector - DF4UW
HF to VHF Active Antenna
Push-Pull LNAs - DF8FR
UHF Dual-Gate LNA
VLF to VHF Active Antenna - DB1NV
Wide Band Amplifiers
Active Patch Antenna for GPS
2.3 GHz 0.3dB-NF LNA - WD5AGO
L-band Dual-GaAs FET 0.4dB-NF LNA - WD5AGO
L-band Dual-Stage 0.3dB-NF LNA - WD5AGO
30 MHz to 3400 MHz LNA - G4DDK
144 MHz - 222 MHz - 432 MHz GaAs LNA - WA5VJB
144 MHz - 222 MHz Power GaAs LNA - WA5VJB
902 MHz - 1296MHz - 2304 MHz GaAs LNA - WA5VJB
144 MHz LNA - AA4AW
Noise Reduction Active Antennas - WD4PLI
Regenerative LNA for Loop Antenna - W2IMB
10 GHz, G=18dB, NF=2dB, LNA - WB6IGP
144 MHz Differential FET LNA - W4KAE
144 MHz LNA - K6MVH
220MHz Dual-Gate MOSFET LNA - K1CLL
Very Low Frequency Preamplifier - WB6IGP
50 Hz to 100 MHz Wideband Preamp - NZ9A
5MHz IF Amplifier with 50dB Gain-Control
14 MHz High-IP3 LNA
Engelbrecht Balanced IF Amplifier
Gain Controlled RF Amplifier
High Performance Post-Mixer Amplifier
Two-Stage Norton Amplifier
Variable Gain IF Amplifiers
JFET LNA / Attenuator
5 MHz to 5.4 MHz Variable Frequency Oscillator
6 MHz to 6.35 MHz Variable Frequency Oscillator
7 MHz to 7.3 MHz Variable Frequency Oscillator
30 MHz to 200 MHz VCO
50 MHz to 150 MHz Crystal Oscillator
50 MHz Crystal Oscillator
100 MHz Crystal Oscillator
100 MHz VCXO
455 kHz Ceramic Filter BFO
Butler Crystal Oscillator
Vackar VFO G3PDM
High Power VFO - K7HFD
Low Voltage Crystal Oscillator
Parallel Mode Crystal Oscillator
Series Mode Crystal Oscillator
Variable Crystal Oscillator VXO
750 MHz Push-Push Oscillator
Butler Overtone Crystal Oscillator
High Overtone Crystal Oscillator
3 MHz to 30 MHz VCXO
Low Noise Differential VFO - 5 MHz to 5.5 MHz
VHF Oven Crystal Oscillator - W6PQL
1.3 GHz VCO with Emitter Noise Feedback
2 GHz to 4GHz VCO
220 MHz Low Noise Cascode Oscillator
600 MHz to 2.2GHz VCO
800 MHz to 2.2GHz Push-Pull VCO
1 GHz Differential VCO with Amplitude Control
10 MHz VXO
455 kHz Beat Frequency Oscillator
Crystal Oscillators Types
VXOs Types and Schematics
750 MHz to 1250 MHz VCO
High Performance VHF Overtone Oscillator - GW4DGU
Octave VCO with active bias
200 MHz to 400 MHz VCO
1700 MHz to 1950 MHz VCO
Very Low Phase Noise Crystal Oscillator - Wenzel
1 GHz Very Low Phase Noise VCO
74 MHz to 105 MHz Low Noise VCO
100 MHz Low Phase Noise VCXO
125 MHz Very Low Phase Noise Oscillator - ADI
600 MHz to 1200 MHz Low Phase Noise VCO
18 MHz Stable and Constant Amplitude LO
1100 MHz to 1350 MHz VCO
70 MHz to 210 MHz VCO with Dual-Gate MOSFET
5 MHz to 6 MHz VFO - VE7CA
7 MHz VXO - NB6M
14 MHz VXO - NB6M
10 GHz DRO Oscillator
180 MHz X-tal Oscillator - F1ANH
5 MHz X-tal Coupled-Resonator LO
10 MHz Third-Overtone Pierce LO
10 MHz X-tal Cascode Oscillator
27 MHz Third-Overtone with TTL-output LO
40 MHz to 70 MHz VCO
42 MHz to 72 MHz VCO
100 MHz Fifth-Overtone Butler VCXO
110 MHz to 210 MHz VCO ESM500-Receiver
118 MHz to 198 MHz FM-Modulated LO
160 MHz to 260 MHz VCO ESV-Receiver
260 MHz to 520 MHz VCO HP8662A-SigGen
380 MHz to 520 MHz VCO
450 MHz Quarter-Wavelength VCO
567 MHz SAW Oscillator
800 MHz Very Low Phase Noise VCO
Ceramic Resonator VCO
HF Multiband VCO EK070-Receiver
HF Multiband VCO ESH3-Receiver
Low Phase Noise Push-Push VCO
Third-Overtone VCXO with AGC
2.4 GHz to 2.8 GHz VCO
10.5 GHz DRO
102 MHz VCXO
Cavity-Tuned Oscillator
Butler X-tal Oscillators
DC-Switched X-tal Oscillator
FM-Modulated X-tal Oscillator
55.2 MHz VCXO - KA7OEI
1.93 MHz to 1.98 MHz Very Stable VFO - W8DIZ
5.05 MHz - 5.075 MHz Clapp VFO
1 MHz to 5 MHz Goral Type Oscillator
100 MHz Dual-Gate MOSFET Oscillator
Triple Beat Frequency Oscillator
4.9 MHz to 5.5 MHz VFO - TS520
5.225 MHz - 5.575 MHz Franklin Stable VFO
7 MHz QSK VFO - NN1G
Widerange VCXO W7ZOI
5 MHz VXO with ALC
21 MHz VCXO - G3MEV
Variable Crystal Resonator Oscillator - K2BLA
1.3 GHz Low Phase Noise Cavity Stabilized VCO
6 GHz DRO
10 MHz Very Low Phase Noise X-tal Oscillator
40 MHz to 80 MHz Low Phase Noise VCO
72 MHz to 76 MHz VCO - NA5N
100 MHz Very Low Phase Noise VCXO
455 kHz PLL Variable BFO
Microwave SAW VCO
3 MHz to 8 MHz VCO
High Stability Time Base Oscillator
WARC VFO - G3TSO
40 MHz Overtone Oscillator - PA0WSP
133.6 MHz VXO
No-Tune Overtone XO - I4BER
5th Overtone X-tal Oscillator - Wenzel
10 MHz Overtone X-tal Oscillator
5.6 GHz Low Phase Noise MESFET Oscillator
11.3 GHz to14.3 GHz MESFET VCO
325 MHz to 600 MHz Balanced MOS VCO
580 MHz to 2.2 GHz VCO with Combline BPF
Low Phase Noise X-tal Oscillator with ALC
Low Phase Noise X-tal Oscillator
Three-Band VFO
455 kHz X-tal Oscillator
855 MHz to 890 MHz Coaxial-Resonator VCO
1695 MHz to 1750 MHz Coaxial-Resonator VCO
High Short-Term Stability X-tal Oscillator
23 MHz VXO - W6JFR
1 GHz - 1.5 GHz VCO - DB1NV
1 GHz - 1.6 GHz VCO - DB1NV
80 MHz - 1000 MHz Oscillator - DB1NV
150 MHz - 300 MHz VCO - DB1NV
1200 GHz Oscillator - DG4RBF
5.5 MHz to 6 MHz VCO with Divider - DK1OF
5 MHz to 6 MHz VFO - DL6HA
144 MHz 1W Power Oscillator
VFX 24 MHz to 24.3 MHz - DL3WR
60 MHz to 120 MHz VCO - DL8ZX
High Frequency Overtone X-tal Oscillator - DK1AG
Large Short-Term Stability Oscillator - DK1AG
Low Frequency X-tal Oscillator - DK1AG
Temperature Compensated Oscillator - DL1XX
96 MHz Very Low Phase Noise X-tal Oscillator - DK1AG
126 MHz to 130 MHz Scanning VCO - DC3NT
135 MHz VXO 200 kHz-range - DC6HL
800 MHz VCO - DL8ZX
VXO for 144 MHz Transceiver - DB3TB
7 MHz to 7.1 MHz Very Stable VFO - K6BSU
7 MHz to 7.1 MHz VFO - W1FB
Ovenized Crystal Controlled Oscillator - AF8L
48 MHz to 48.7 MHz Stable VFO - DL9FX
Automatic Search VCO - DL8AT
136 MHz VXO - DJ9ZR
1.3 GHz VCO
1.3 GHz VCO - DF5FC
1.5 GHz Coaxial Resonator Oscillator - DB1NV
2.1 GHz to 3.85 GHz VCO - S53MV
10 GHz FM DRO - F6IWF
24 MHz FM X-tal Oscillator
300 MHz VCO - DF5FC
400 MHz to 1900 MHz VCO - DB1NV
450 MHz to 1 GHz VCO - DB1NV
700 MHz to 1400 MHz MMIC VCO - DJ8ES
1850 MHz to 2200 MHz VCO - S53MV
MMIC X-tal Oscillator - DK1AG
VFO with I/Q Output
10 MHz Stable VFO
24 MHz VXO
Microstrip GaAs Oscillators
9 MHz USB/LSB BFO - DC4KU
40.5 MHz, +23dBm X-tal Oscillator - DC4KU
Low Phase Noise X-tal LO - Driscoll
5 MHz Very Low Phase Noise X-tal LO - Driscoll
100 MHz Very Low Phase Noise X-tal LO - Driscoll
10 MHz Cascode X-tal Oscillator
10 MHz Tank-Coupled Oscillator
15 MHz Pierce X-tal Oscillator
120 MHz Butler X-tal Oscillator
1.5 GHz to 1.9 GHz Microstrip Ring Oscillator
5th order Overtone X-tal Oscillator
6 MHz - 8 MHz VXO Crystal Oscillator
21 MHz - 105 MHz Impedance Inverting X-tal Oscillator
50 MHz - 100 MHz Overtone Crystal Oscillator
150 kHz - 550 kHz X-tal Oscillator
700 MHz Low Phase Noise Oscillator
Below 150 kHz X-tal Oscillator
Digital-ICs Crystal Oscillators
PNP Overtone X-tal Oscillator
TTL-Logic X-tal Oscillators
5.6 GHz Integrated Oscillator uStrip Antenna
Stable VFO for 160m/80m - W1VD
6m VFX - K1CLL
100 MHz X-tal Oscillator - WB6IGP
200 MHz to 500 MHz Oscillator - WB6NWW
3 MHz to 4 MHz VFO - WB8VGE
20 MHz High-Stability Lumped-Line Oscillator - W6HDM
7 MHz VCO
13.5 MHz to 14 MHz VFX
14 MHz VFO with I/Q output
50.113 MHz VXO
2.4 GHz Signal Source - W6PQL
900 MHz Signal Source - W6PQL
1104 MHz Signal Source - W6PQL
1296 MHz Signal Spurce - W6PQL
116 MHz High Level X-tal LO
10 GHz LO Multiplier - N1BWT
404 MHz LO - AA5C
12 GHz Signal Source - DB6NT
2808 MHz Signal Source - DC0DA
3256 MHz Signal Source - DB6NT
5616 MHz Signal Source - DB6NT
10223 MHz Signal Source - DL1RQ
10368 MHz Signal Source - DJ6JJ
800 MHz to 2.4 GHz Frequency Tripler
Frequency Multiplier 10 MHz to 30 MHz
432 MHz to 1296MHz Frequency Tripler
Active Frequency Quadrupler
1.3 GHz Signal Generator - W6PQL
2.4 GHz Signal Generator - W6PQL
1152 MHz PLL Signal Source - OZ1GDS
1152 MHz Signal Source - F6BCU
1150/1152 MHz Signal Source
1152 MHz Signal Source - G4DDK
422 MHz to 1267 MHz Diode Frequency Tripler
1296 MHz Signal Source - W6FZJ
1296 MHz Weaksignal Noise Source - WA6UAM
L-band Signal Source - N6TX
1.42 GHz to 5.7 GHz Multiplier - F1HPR
2.5 GHz Signal Source - G4DDK
2 GHz to 12 GHz Multiplier - F1OPA
9.5 GHz Signal Source - F6BVA
10.5 GHz Signal Source - F6BVA
12 GHz Signal Source - F6BVA
130 MHz to 6 GHz Multiplier - F1JGP
1296 MHz to 10368 MHz Multiplier - F6BVA
C-band Signal Source - F1JGP
100 MHz to 1700 MHz Frequency Multiplier
902 MHz Signal Source
200 MHz to 600 MHz Frequency Tripler
800 MHz to 2400 MHz Frequency Tripler
Varactor Tripler
0.5 MHz to 110 MHz AM/FM Signal Generator
Simple 2.4 GHz Signal Source
1 GHz to 1.3 GHz Signal Source - G4DDK
Frequency Multipliers Types
100 MHz - 500 MHz Multiplier
432 MHz - 1296 MHz Varactor Tripler - VK2TDN
No-Processor DDS - G3XBM
1 kHz to 9 MHz Sinusoidal Signal Generator
1 kHz to 999 kHz PLL Signal Generator
2 MHz to 2 GHz AM Harmonics Generator
9 MHz to 1.3 GHz Harmonics Generator
44.4 MHz - 45.1 MHz PLL VFO - PA0KSB
455 kHz SSB Generator
144 MHz to 432 MHz Varactor Frequency Tripler
Two Microstrip Varactor Frequency Triplers
2.4 GHz Test Generator - DK1KQ
1 MHz to 30 MHz Generator for Antenna-Analyzer - DJ8ES
22.5 MHz 135 MHz Frequency Multiplier - DK1OF
48 MHz VFO Frequency Doubler - DJ3MY
90 MHz to 2160 MHz Frequency Multiplier - DJ1EE
92 MHz to 3312 MHz Signal Source - DC0DA
144 MHz to 28 MHz High Dynamic Range Converter - DJ7VY
144 MHz to 2304 MHz Frequency Multiplier - DC8UG
432 MHz to 3456 MHz Frequency Multiplier - DC3QS
540 MHz to 1080 MHz Frequency Doubler - DC3QS
1080 MHz to 2160 MHz Frequency Doubler - DC3QS
1152 MHz Signal Source - DC0DA
1152 MHz Signal Source - DC8NR
x8 Frequency Multiplier with Idler - DC8UG
1152 MHz FM Signal Source - DB1NV
1152 MHz to 10368 MHz Multiplier - DB1NV
576 MHz Signal Source - YU3UMV
1296 MHz Simple Signal Source
2304 MHz Simple Signal Source
1.3 GHz Signal Source - DL1RQ
1.33 GHz to 5.34 GHz Quadrupler - DL1RQ
1 GHz to 10 GHz Marker Generator - DB6NT
2556 MHz Signal Source - DC0DA
Power Tripler using BC-junction
10 GHz Weak Signal Source
VHF to Microwaves Harmonic Generator - KE5FX
1.2 GHz to 2.4 GHz Frequency Doubler - K1CCL
450 MHz Signal Source - K1CLL
VHF-UHF Signal Source - W6WTU
Odd Frequency Multiplier
VFO Stabilizers / PLL
One chip VFO Stabilizer - G0UPL
VFO Stabilizer - PY2MG
VFO Stabilizer - PA0FRI
Huff-and-Puff VFO Stabilizer - WN5Y
VFO Stabilizer - PA0CMU
2 x Huff-and-Puff VFO Stabilizers - RSGB
40 MHz to 70 MHz 3-band Frequency Stabilizer - DC4KU
1 MHz to 100 MHz VFO Stabilizer
VFO Stabilizer - PA0KSB
5.6 MHz - 6 MHz PLL-VFO - YB3DD
6 MHz - 6.4 MHz Low-Drift VFO - N6NWP
PLL for 144MHz Transceiver - WA4DSY
100 kHz - 35 MHz PLL - DH1AAD
Digital Drift Compensation for VFO
VFO Stabilizer - DL1BT
VFO Stabilizer - DK3SP
10 kHz-step PLL for 2m Transceiver - DK1OF
PLL for 2m Transceiver - DK1OF
135 MHz to 137 MHz PLL - DJ7ZV
Discrete Phase Comparator - S53MV
HF VFO Stabilizer
Minisynth VFO - G4JST
38 MHz to 42 MHz PLL
144 MHz Frequency Synthesizer - WB2BWJ
50 MHz PLL - N7APE
Antenna Tuners / Analyzers
Antenna Analyzer - DK7NT
HF Antenna Analyzer - DL2RRN
Antenna Analyzer - F6BQU
88 MHz - 960 MHz Antenna Analyzer
Antenna Noise Bridge
HF Antenna Tuner with VSWR-meter
SWR Bridge Tuner "Rainbow" - N2CX
Antenna-Tuner for QRP
HF QRP Manual Tuner - W6JJZ
160m to 10m Z-match for Dipole Antenna - DJ5RE
500 kHz - 30 MHz Antenna Tuner
Balanced Antenna Tuner - W4MMQ
80m to 10m ZZ-ATU - G4RGN
Minituner for HF - K2JHU
Antenna Tuner with SWR-meter for QRP - AD5X
"Handy-Randy" QRP Tuner - W3RDF
Antenna Tuner Helper - K3PUR
Super-Tee Antenna Tuner - WB8VGE
RF Mixers
IF Filters Switching Circuit
TX/RX RF Switch FET
TX/RX RF Switch PIN
RF Sensing TX/RX Switch
RX/TX Quarter-Wave PIN Switch
PIN Attenuator BAR61
Variable PIN Attenuator 1dB to 20dB
AGC with PIN Attenuator
4xPIN Diodes Wideband Switch
Modulator-Demodulator using PIN Diodes
Phase Shifter using PIN Diodes
RF Attenuator Types using PIN Diodes
RF Switch Types using PIN Diodes
AGC PIN Attenuator
Automatic Antenna Attenualtor 45dB range - RSGB
HF 25W PIN Antenna Switch
All Transfer PIN Switches
PIN Diode Limiter
SPMT PIN Switches
T/R Switch with Lumped Transmission Line
Mixer Quadrature Termination
144 MHz TX/RX PIN Switch - LA8AK
Passive Whole-Band LO Phase-Shift Network
T/R Switch with Shunt PIN Diodes
Doubly Balanced Mixer MC1496
Mixer Diplexer
Dual MOSFET Mixer
Microwave Mixers
Stripline Quadrature Microwave Mixers
High IP3 Mixer +40dBm - IK4AUY
1296 MHz Diode Mixer - WA6UAM
Dual-FET HF Mixer
High Dynamic Range HF Mixer
High IP3 (33dBm) BJT Mixer
900 MHz BJT Gilbert Mixer
HF Sub-Harmonic Mixer
1152-10368-24192 MHz Harmonic Mixer
Microwave Harmonic Mixer
1296 MHz DBM with ferrite balun - WA6UAM
1296 MHz DBM with coaxial balun - WA6UAM
Microwave Coaxial Diode Mixers
Distribute Diode Single-Balanced Narrowband Hybrid Mixer
Single Schottky Diode Mixer
Two-BJT Product Detector
Dual-Gate MOSFET Product Detector
2.4 GHz Microstrip Harmonic Mixer
Double Balanced BJT Mixer - JG1EAD
Double-Balanced JFET Mixer
Push-Pull Dual-Gate MOSFET Balanced Mixer
Quad-FET Switching Mixer
2.4 GHz GaAs-FET Mixer
12 GHz GaAs-FET - Mixer
Microwave GaAs-FET Drain Pumped Mixer
Binaurale Mixer - DL7MAJ
AD835 Mixers - DL7VFS
DBM Switching High-Speed CMOS Mixer - DL7VFS
DBM Switching Mixer - DL7VFS
High-IP3 Dual-AD835 Mixer - DL7VFS
High-IP3 Mixer with DG611 - DL7VFS
Mixer for SDR with 74HC4053
Switching Mixer with MAX4544 - DL7VFS
144 MHz Dual-FET Mixer - DL6ZZ
Wideband Ring Mixer - DL3WR
Interdigital Mixer - DK3UC
Rat-Race Microwave Mixer
Dual-FET Mixer
Harmonic Mixer - S53MV
Branch-Line Balanced Diode Mixer
Quad-JFET DBM Mixer
True TLT H-mode Mixer - UR3IQO
Sub-Harmonic Mixer - WB6IGP
Cascode JFET Mixer
Gilbert Mixer with Discrete BJTs
High-IP3 Mixer with FST3125 and Control Circuit
Audio/Video Transmitter
AM TV Transmitter
23cm ATV FM Transmitter
A-V UHF TV Modulator
Crystal TV Video Modulator
TV Audio-Video Transmitter
Simple TV Video Modulator
TV Modulator
A-V Transmitter - ZP5ZDM
A-V VHF Transmitter
FM ATV Receiver
UHF A-V 1W Transmitter
1296 MHz FM ATV Transmitter - I2ROM
ATV FM Receiver-Demodulator
470 MHZ PLL FM Video Demodulator
Two ATV FM PLL Demodulators
432 MHz ATV AM Transmitter
439 MHz ATV AM Transmitter
902 MHz PLL FM ATV Transmitter
1296 MHz 300mW FM ATV Transmitter
1296 MHz AM ATV Transmitter
1296 MHz FM ATV Transmitter - F3YX
UHF 2W AM ATV Transmitter
UHF 5W AM ATV Transmitter
1296 MHz PLL controlled FM ATV Transmitter - N9ZIA
23cm FM ATV Transmitter - DL1SNG
ATV AM Demodulator - DJ4LB
ATV AM Video Modulator and Transmitter - DJ4LB
2.4 GHz ATV FM Exciter - DJ8ES
432 MHz ATV Transmitter - KA2CWL
Filters
Baluns / Transformers
Active Baluns - Differential to Single Ended
Active Baluns - Single Ended to Differential
Balun Transformers
433 MHz Lumped Components Balun
Broadband Transformers
Guanella 4:1 Current Balun
4:1 Broadband Transformers
Coaxial 1:1 Balun
Coaxial Baluns
HF Coaxial Balun 50-200 ohms
HF Twisted-Wire Balun
1MHz - 40MHz (1.5:1) 50ohm-75ohm UNUN
1MHz - 40MHz (2.25:1) 22ohm-50ohm UNUN
Equal Delay Transformers
Transmission Line Transformers
Twisted-Wire Various Impedance Ratio Transformers
Couplers / Splitters / Isolators
Narrowband Coupler from Wilkinson Divider
N-way Wilkinson Splitter
Wilkinson Divider Versions
In-Phase and 180° Transmission Line Combiners
Microstrip Couplers
CPW Couplers
Lange Coupler
100 MHz to 500 MHz Wilkinson Divider - DJ1EE
Wideband 180° Power Divider
3dB Wilkinson Splitter using Coax Cable - DC4KU
6dB Resistive Power Splitter - DC4KU
Wheatstone-Bridge as Combiner/Splitter - DC4KU
Microstrip Reverse-Phase Hybrid-Ring Coupler
Slotline Reverse-Phase Hybrid-Ring Coupler
CPW Reverse-Phase Hybrid-Ring Coupler
Uniplanar Slotline-Ring Magic-T
Double-Sided Slotline-Ring Magic-T
Modulators / Demodulators / Detectors
SSB Modulator/Demodulator - JG1EAD
I/Q Phasing Modulator
Tayloe I/Q Detector - W6JL
Weaver I/Q Modulator/Demodulator - DK7JD
FSK Modulator CMOS
90-degrees Phase-Shifter for I/Q-modulation
Modulation Circuit for SHF Beacon
Phase Detector with Discrete Components EK47-Receiver
Discrete Phase-Frequency Detector and LPF
Very Low Noise/Jitter Phase Detector
9 MHz SSB Modulator/Demodulator - DC4KU
Wideband FM Demodulator - DC2CS
9 MHz IF and Demodulator
72 MHz NBFM Modulator - OE6TH
BJT Phase Comparator - DK1OF
FM Demodulator-Discriminator with LPF - DJ4BG
Power Supply and Modulator for Gunn LO - G3RPE
PSK Modulator
Simple LC PM Modulator - W0INK
27MHz X-tal Phase Modulator
Active AM Demodulator
DC to 500 MHz Log Detector - DJ8ES
I/Q Modulator with DBM
FM Demodulator for 9 MHz IF - DC4KU
UHF to 10 GHz Power Detector - W1GHZ
Discrete Phase-Frequency Comparator - K2OAW
FM Modulator with MC1648
FM to AM Conversion Discriminator
Simple Phase Detector
RTTY Demodulator - WB4MBL
Phase Detector with Double Balanced Mixer
Capacitance Meter
Field Strength Meter LM324
HF Q-meter VK5JST
RF Power Calibrator
VHF Wattmeter
LED RF Power Meter - N9ZIA
Return Loss Bridge
Return Loss Bridge with AD8307
HF SWR Bridge
Grid Dip Meter 2 MHz - 20 MHz
Field Strength Meter 3 Levels
BandScope for 2m Band
Lightening Detector
3-Digits Dip Meter
Calibrated Noise Source
Capacitance Meter using DVM
Inductance Meter using DVM
High-Impedance RF Probe
DC to 500 MHz Log Detector/Amplifier - DJ1ES
L-C-R Bridge - G3BIK
Phase Meter
Inductance Meter - VK5BR
L/C Meter - IZ7ATH
FM Deviation Meter
Flicker-Noise Generator - Wenzel
2.4 GHz mW Power Meter - F1HDD
Simple Crystal Tester - F5JTZ
Inductance Meter - N5ESE
Magnetic Field Meter
RF dBu Meter
Two chips LED Frequency Counter - PA2OHH
0-99 kHz Frequency Counter - G0UPL
LED SWR/Power meter - PY2MG
Electro-Magnetic Waves Detector
Long-Wave Lightening Detector
Cable Reflection Tester - N9ZIA
TDR Circuit and Signals - T.Engdhal
1 MHz to 1 GHz LED Absorption Meter - GW1TDV
S9 HF Signal Generator
Audio Filter Analyzer
True Linear RF Power Detector
Grid Dip Meter 3.5 MHz to 110 MHz
1.6 MHz to 150 MHz Modulated Grid-Dip Meter
Five Grid-Dip Meters
30 kHz to 30 MHz Sinusoidal Signal Generator
Capacimeter using NE555
0-1uF Capacimeter
Coil Short-Circuit Detector
Fonometer
All-BJTs L-C Meter
VHF FM Signal Generator
Sweeper for 455 kHz IF
500 kHz to 3 GHz LED Field-Strength Meter
2xBJT Capacimeter
Varactor Capacimeter
Automatic VSWR and Power Meter - W0INK
RF Sweeper - VK2ZAY
Very Low Frequency Survey Probe - VK2ZAY
1 MHz to 30 MHz Noise Source - G1HSM
Capacimeter with 2xNE555 - WA8MCQ
Dual-LED SWR Indicator for QRP
HF In-Line Return Loss and Power Meter - N2PK
Spectrum Analyzer on the Oscilloscope
Grid-Dip Meter with Digital Display
Marker Generator - KB1MW
Micro-Wattmeter - W7DB
Sweep Generator - NA5N
Simple Function Generator
Optical SWR meter
Glitch Detector
Satellite Finder
Electrostatic Detector
1nF to 100uF Capacimeter
10 Hz to100 kHz Frequency-to-Voltage Converter
100 kHz to 30 MHz RF Probe with Detector Monitor
100 MHz Oscilloscope Probe
L/C meter multirange
VHF LC Resonance Indicator
Harmonics Detector - G3JGO
Lighting Storm Monitor
Ultra Simple CRT Oscilloscope
Sudden Ionospheric Disturbance Receiver
7-digits Frequency Counter - VU2IYI
Accurate Capacitance Meter with PLL
Precision Two-Tone RF Generator for IMD Test - KI6QP
Quartz Tester
10 Hz to 100 kHz Sinusoidal/Rectangle Generator - OE1MSA
Two-Tone IMD Test with Crystal Oscillators
Wobbulator 1 Hz - 40 MHz - DC2MR
1 MHz to 42 MHz SuperDipmeter - DK1HE/DL2FI
HF-VHF RF Level Meter with Monitor - DL9AH
Calibration Spectrum Generator - DL3XW
2pF-1uF Capacimeter - DC6FC
70 MHz to 1350 MHz Wave Absorption meter - DJ2HF
VHF-UHF Noise Source - DB2GM
29 MHz to 460 MHz Dual-FET Grid-DIP Oscillator
RF Bridge for Impedance Measurements
RF Noise Bridge
Q-meter - VK5BR
Audio Generator 50 Hz to 36 kHz
EM-Field Intensity Meter - WA7JHZ
1 MHz to 30 MHz Quartz Tester - DK4KU
Peak Reading RF Power Meter - W0IVJ
0 - 500 MHz Field Strength Meter - DK6UU
QRP SWR Meter - HA5KU
Crystal Timebase
Phase Meter - K1FK
10 kHz to10 GHz LED-Bargraph Power Meter - W1GHZ
Antenna Ratio Meter - W1GHZ
300 MHz Bandwidth Noise Generator
Function Generator - WA2IKL
Splatter Meter - W1BG
40 kHz to 200 MHz RF Voltmeter - WA6NIL
Voltage to Frequency Converter
3 MHz to 22 MHz Signal Generator - K1BKT
140 MHz to 460 MHz Wavemeter - K1CLL
Crystal-Controlled Audio Generator - KB4ZGC
FM Deviation Meter - W3QVZ
Very Simple Oscilloscope - K8JWR
3-Digit Frequency Counter
Digital Capacimeter
3 MHz to 45 MHz Signal Generator
DC Protection Circuits
Overvoltage Protection
Power Supply 13.8V/20A
12V Battery Charger
13.8V Float-Charging Power Supply
28V / 20A Power Supply
Low Noise Power Supply for Audio Amplifiers
Power Supply with Noise Clean-up Circuit - Wenzel
13.8V / 10A Power Supply - N1HFX
13.8V / 40A Power Supply - OZ2BKK
13.8V / 25A Power Supply - F5JTZ
28V / 50A Power Supply - F5UAM
1.25V-25V / 2.5A Power Supply
DC/DC using a Linear Regulator
High Voltage DC/DC Converter
0-30V 3A Switch-Mode Power Supply
2V to 36V 10A Power Supply - WB6TOX
13.8V 23A MOSFET Power Supply - KF9GQ
Variable Voltage 20A Power Supply
Electronic CW Keyers
Electronic Keyer - F5JTZ
Iambic Touch-Keyer - YC5NBX
Simple CMOS Keyer - OH7SV
Simple Electronic Keyer - N1HFX
CW Electronic Keyer
CMOS Iambic Keyer - N5FC
All-BJTs Keyer
CW Keyer - YO3APG
Deluxe All-Solid-State Iambic Keyer - W1RML
Electronic CW Keyer - YO3CZI
Single-IC CW Keyer - W9HFM
CW Keyer with NE555
Memory Keyer - AI2T
Micro-TO CW Keyer - K8CU
Iambic Keyer - N5DY
Morse Code Speed Display - VE1BU
CW Keyer - K3QKO
CW Keyer with Monitor - K2BLA
2N2222 Keyer - W6JJI
Semiautomatic Keyer - WB4MYL
Vibroplex Bug Emulator - W4LJD
7400 CW Keyer - WB5PPV
CW Typewriter - W4RNL
CW Speedometer - WB4TYL
TTL CW Keyer - VE3GSP
AGC Circuits
AGC with Squelch Control
AGC with AM Detector
Receiver AGC with hang threshold
AGC / S-meter - PY2MG
AGC Audio Preamplifier
AGC in Audio - RSGB
IF-stage with AGC PIN-diode
IF Amplifier with Auto-AGC
Reverse AGC Circuit - W6JFR
Audio Automatic Gain Control
AGC for 9 MHz IF - DC4KU
Audio AGC - N6WA
9 MHz IF with AGC
Active CW Filter and Audio Amplifier
Dynamic Noise Filter
Microphone Preamplifier Electret
Microphone Speech Processor
Microphone Amplifier Low/High Impedance
Class-A Headphone Amplifier
Class-A Audio Amplifier
Speech Processor - TL081
Variable CW Bandpass Filter
Variable CW Filter and Amplifier
Baxandall Audio Filter
Microphone Amplifier with ALC
Audio Amplifier with mute control
Noise Canceling Electret Microphones - WB9YBM
Dynamic Microphone Preamplifier
Speech Processor - All BJT
Audio Preamplifier with Dynamic Noise Reduction
Class-A HIFI Headphone Amplifier
Super Class-A Low Distortion 3W Amplifier
CW Audio Filter with Digital Selection - PY2MG
Microphone Preamplifier with Tone Control - PY2MG
Boosting Gain and Limiter of LM386 - VK3AWC
Variable Audio LPF with MAX293
300 Hz - 3 kHz Microphone Filter
VOX Circuit
Voice Level Meter
Microphone Dynamic Compressor
1kHz Sine Wave Oscillator
High-Pass Low-Pass Microphone Preamplifier - N2MNN
Passive Audio SSB-CW Filters - W3TS
LC CW Band Pass Filters - DC8NR
Audio Intelligibility Enhancer - N4GG
Dual-Tone Audio Generator - VE3FIT
RF Speech Clipper - DF4ZS
1W Audio Amplifier with Compressor
Booster for Elektret Microphone
74dB Gain with LM386 - JF1OZL
Active Audio BPF 1kHz Bandwidth
Audio Squelch Circuit
High Dynamic Range Audio Compressor
Low Distortion CW Filter
SSB Audio Filter
Active Noise Canceling Headphones
Fourth-order Elliptic SSB LPF
Switched-Cap Variable Audio LPF
Voice 5 Band Equalizer
CW Filter - DL7HG
1W Audio Power Amplifier with LPF
Audio Limiter - DJ4BG
Ge-BJT Audio Power Amplifier
One BJT Audio Low Pass Filter
Simple Audio Sinusoidal Generator
Audio Switch with active CW Filter - DJ3RV
3.5W Audio PA with Active CW Filter - W1FB
Simple FET Audio Filter
Variable Audio Notch Filter - K4VIZ
Voice Compressor with Filter
Dynamic Noise Limiter
Mike Preamplifier with Dynamic Compressor
40dB Audio Notch Filter
Microphone Equalizer and Dynamic Compressor - DL7MAJ
Audio T-Notch Filter - G3VFP
Microphone Frequency Booster - G3VFP
Pseudo Stereo CW - G3VFP
Tone Meter - W1GHZ
Subaudible Tone Encoder - W4NFR
Dynamic Mike Preamplifier for IC-706 - W5RK
Magical Audio Filter - W6QIF
Noise Limiter - K8MKB
Pseudo CW Filter
Microwave Motion Detector
Biasing Microwave GaAs FET's
UHF Doppler Motion Detector
2.4 GHz Prescaler
Divide by N using 74160 - Wenzel
Staircase Frequency Divider - Wenzel
Frequency Counter Prescaler
12 GHz : 1000 Prescaler - DG6RBP
Quarter-wave Coaxial Baluns
UHF Movement Detector
Bias-Tee 5 kHz to 3 GHz
Microwave Coaxial AM Diode Detector
Microwave FM Diode Detectors
Microwave Microstrip AM Diode Detector
Power-Combining using Wilkinson Dividers
Distributed Wideband Balun for Microwaves
Microstrip Stubs
Phase Shifters Topology
1296 MHz Cavity Tuned BPF - VK2TDN
Microstrip Balun
Microstrip Filter Comparation
Microstrip Phase-Shifter T/R-switch
Gunn Diode Oscillators
47 GHz to 94 GHz Frequency Doubler
Microstrip Bends
Microstrip Coupler Splitter Balun
Microstrip Discontinuities and Applications
Microstrip T-Junctions
Waveguide Transistions
Lumped to Distributed Conversion
12.5 GHz Decimal Divider - DG0VE
500 MHz Prescaler 11C90
10 GHz Tuned Gunn Preamp & Antenna - G3RPE
10 GHz Un-tuned Gunn Preamplifier - G3RPE
Simple 10 GHz Transceiver - DC0MT
Coplanar-Stripline to CPW Transitions
CPW to Rectangular-Waveguide Transitions
CPW to Slotline Transitions
CPW to MicroStrip Transitions
Printed LC and the Equivalent Schematic and Expression
EM Fields of Cavity Resonators
Horn Antenna Dimensions
3dB Power Divider for 10.3 GHz - G3PHO
Microstrip Balanced Mixer using Branch-Coupler
Microstrip Filters
Microstrip Resonators
Various Transmission Lines and Waveguides
Microstrip Filter with Ring-Resonators
2 GHz Buterworth Microstrip LPF
Lumped to Microstrip Counterpart Equivalency
Microstrip Phase Shifters
Transmission Line Impedance at Various-Lengths - VE3RE
Microwave Pipecap Filter - WA5VJB
High Dynamic Range Noise Blanker
Noise Blanker
Line Synchronous Noise Blanker - KA7OEI
3xFETs Noise Blanker
Noise Blanker with Timer
HF Noise Blanker - DJ7VY
Left / Right Revolution Counter (for tuning)
RF Activated Tone Monitor
PTT Delay Circuit - W3KKC
Ultrasonic Proximity Detector
Multi-Q Receive Loop Antenna
Low-Cost FSK Generator
Laser-Torch Wireless Communication
LNB 13V/18V H/V Switch
RX/TX 27 MHz Wireless Remote Control
Air-Speed Sensor for Cooling Fan
RIT for VFO Transceivers
S-meter 120dB Dynamic Range - DC4KU
Prevent Thermal Runaway for BJT Power Amplifiers
Temperature Compensation for X-tal Oscillators - I6MCF
Simple Dual-Gate MOSFET PLL
Interference Canceling Circuit - VK5BR
Cascode Amplifiers - JG1EAD
Sine to Square Wave Converter - Wenzel
VFO Temperature Controller
AM Detector / Squelch Circuit
1MHz-step Harmonic Marker Generator
S-meter 90dB 0-500 MHz - DC4KU
S-meter 120dB 9 MHz-IF - DC4KU
9 MHz and 455 kHz IF amplifier - DC6HCL
10 MHz - 1 MHz Marker Generator - OE2TZL
9 MHz IF Amplifier - DC4KU
Proportional Temperature Control for Gunnplexer - W4UCH
Temperature Fan Regulator for Power Supply
Lamda Diode with Two JFETS
Capacitance/Voltage Linearization for Varicap Oscillators
Realistic S-meter - DJ3NW
SSB Monitor - G3OGR
Using Collector/Base junction as a Varicap
Low Voltage Detector - W6WTU
TTL-DAC to Generate SAW Tooth
Rotary Switches Eliminator - WA2FPT
10dB Bridge-Tee Pad MOSFET
Bidirectional Amplifier
Shape CW Transmitter Keying
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