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SV1BSX's Homebrew Corner

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UHF LNA
Low Noise Antenna pre-amp
..with GasFet & NF 0.5 dB



   SATELLITE PROJECTS  
Antenna Elevator
Homebrew Elevator for Satellites
by using a cheap TVRO Actuator !

Antenna Pre-Amp
... for AO-7 Mode-A (10m Band)
simple & easy pre-amp !
UHF 10 Elements
Yagi Antenna
Visit relative category below:
Antenna projects
"click" here to Jump !
VHF 3 Elements
Yagi Antenna
UHF Low Noise
Antenna pre-amp
Visit relative category below:
VHF-UHF projects
"click" here to Jump !
VHF Antenna
pre-amp


  ANTENNA PROJECTS  
VHF Dipole
How to build VHF dipoles
..with Gamma Match

VHF Collinear
with 2 dipoles
Tips & construction infos
...two dipoles, 5.1 dBi Gain

3 Elements
VHF Yagi
Small VHF Yagi
for general use, 8.17 dBi Gain

6 Elements
VHF Yagi
Super-duper/small VHF Yagi
..with sharp curve but excellent Gain (11.85 dBi)

10 Elements
UHF Yagi
Small UHF Yagi
for SAT & Ground stations, 13.5 dBi Gain

Short Dipole
Dual-Band HF Antenna (by SV1XY)
40m "plus" 10m Band
Windom Antenna
Homebrew "Off-center"
HF Multiband Antenna
L-P-T Antenna Tuner
"One-box", triple-type
HF Antenna Tuner
Antenna Box
HF Antenna Distribution box
..one Coaxial-feeder for 3 antennas


  VHF-UHF PROJECTS  
UHF LNA
Low Noise Antenna pre-amp
..with GasFet & NF 0.5 dB

VHF Antenna
pre-amp
Excellent Antenna pre-amp
...with BF981 Dual-gate MosFet

VHF Module
Power Amplifier
0-20 Watts on VHF
...just by using a chip !

UHF Dummy-Load
Homebrew Dummy for UHF

Hi-pass Filter
for VHF-UHF
...prevents the 88-108 MHZ
Broadcast Interferences

5 Watts VHF PA
QRP cheap PA
for CW-SSB

25 Watts VHF PA
BLY89 RF-Power stage
Spec's from PHILIPS DataBook

144 to 28 MHz
Down Converter
..useful as 2nd converter
from S-band D/Cs to HF-Rx


   PACKET, APRS & GPS  
GPS Garmin-Etrex
Homebrew data-connector
..for Etrex GPS

Baycom modem
1200 Bps
The "famous" Baycom
...for "Poor Man Packet-ers"!
Tinny track
APRS-tracker
....PCB for Tinny-1
MAX 232 Interface
TTL to RS-232
...Voltage-levels Interface


  CHARGERS & POWER SUPPLIES  
NiCad battery
Charger
Simple battery charger
..with LM317T
DC to DC converter
... 12 to 24 Volts / 0.5A
...for Satellites and Hobbies

CrowBar circuit
Professional "OverVoltage" circuit
...protect your expensive RIGs !


  MISCELLANEOUS Projects  
2.4 GHz Signal Source
S-Band's tester
..for MMDS and Satellites

SubTone generator
Simple circuit for 88.5 Hz
...for Repeaters triggering
Universal "Key" circuit
Opto coupler isolator
...just for "Contest-ers" !


  Hints & Kinks  
All about
Coaxial-cables
Loss/Band, VF etc.
Coaxial-cables
Loss calculator
"On line" calculator
How to make easily
your N-type connector
...step by step !
Are you looking for the "Z" of unknown Coaxial-cables?
Formula to determine the unknown "Z"

All modifications - for all transceivers here !
"click" here


2500 transceivers here !
Pic's & few spec's!
"click" here

"With a soldering iron in one hand, a schematic in the other, and a puzzled look on his face..."