Here are some projects I realized recently. Feel free to contact me for more info !
| PROJECT: | DESCRIPTION: | |
|---|---|---|
| Construction | ||
| • A contest 'Voice Keyer' | Generates messages for contests. Based on VELLEMAN kit, will transmit recorded messages up to 20 sec in length. | |
| • 13cm 150w Power Amp | 2w in / 150w out PA for the 13cm band - based on 2 Spectrian boards | |
| • The 'MELITTA' version 1 | A basic 5 bands HF filter for contests with multiple stations | |
| • The 'MELITTA' version 2 | An advanced high performance remote switchable HF Band filter for contests with multiple stations | |
| • The 'MELITTA' version 3 | Howebrew HF Band pass filters and comparison to W3NQN type | |
| • Coax stubs harmonics filter | Effective COAX stub filters to attenuate harmonics, for contesting with multiple stations | |
| • Build a quality RF sampler | Build a high quality RF sampler 2 ... 145 MHz / 1.5 kW for your spectrum analyzer or power meter | |
| A R D U I N O / ESP | ||
| • Simple AZ Rotor Controller | A simple antenna rotor controller (azimuth only) with YAESU RS-232 serial interface | |
| • AZ + EL Rotor Controller | A simple antenna rotor controller (azimuth & elevation) with YAESU RS-232 serial interface | |
| • DAVIS WM2 Wireless | Connecting over WiFi "Davis Weather Monitor II" display station to emulated sensors | |
| • QO-100 Sat SYNC | A solution for 2 YAESU transceivers to operate sync'ed in full duplex on QO-100 Es'hail sat. | |
| • AUTO keyer for ICOM TRX | An automatic keyer for ICOM transceivers (voice / CW / Digi Modes) | |
| • Icom CI-V XVRTR interface | An CI_V CAT interface (proxy) for ICOM transceivers to work with transverters | |
| • CTCSS decoder | A very performant and reliable multi - CTCSS subtone decoder | |
| • Auto Antenna Tuner | An automatic ATU for ICOM transceivers and 20/40m dual band end fed half wave antenna | |
| • DAVIS Wind Sensor | A readout for DAVIS wind direction / speed sensor + thermometer | |
| • Simplex Repeater | A simplex (parrot) repeater controller, for use with GM-350/950 radio's | |
| • Antenna Matrix Switch | Automatic Antenna (or Band Pass Filter) switch matrix, controlled by ICOM CAT | |
| • Solid State PA Control | Readout, supervision, control and protection of 1.2 kW SSPA | |
| • Power & SWR Meter | Power & SWR meter, multiband , can be used with any bridge. Reads in dBm, PEP, or audio indication. | |
| • GPS Maidenhead Locator | GPS receiver display with MAIDENHEAD locator converter. | |
| Repeater & Echolink | ||
| • A PC watchdog | A watchdog based on PIC circuit for your echolink PC | |
| • PRM80 Repeater | Repeater with 2x PRM8020 Philips/SIMOCO | |
| • X6000 Antenna | Experience with Diamond X6000 antenna | |
| • DTMF WatchGuard script | A small script to kill certain DTMF codes received and temporarily suspend DTMF decoding | |
| Antenna's | ||
| • EFHW for 10 to 160m | A short (20m) EFHW antenna re-engineered for operation from 10 to 160m bands operation | |
| • Coax Traps Construction | Some hints and tips to construct easily reproducible HF traps with ordinary coax cable | |
| • Wire Traps Construction | Some hints and tips to construct HF traps with aluminium wire & doorknob capacitor | |
| • Simple multiband dipoles | Simple multiband dipoles, I use them to stay in touch with homebase during holidays! | |
| • Shorty Forty | A very short (less than 10m long) dipole for 40m band | |
| • Baluns | Building yourself a 1:1 current balun from QRP to QRO | |
| • Mobile Antenna 20/40m | A high efficiency mobile antenna for 20 an 40m operation | |
| • Full Size 80m GPA | A high efficiency 80m antenna with Spiderbeam pole | |
| • Inverted-L 80m & 160m | Inverted-L antenna for portable / field day / DX-pedition | |
| • K9AY Antenna | The K9AY antenna is a directional antenna for 160 and 80m bands | |
| • 160 & 80m band preamp | A high performance antenna preamplifier for 160 and 80m bands | |
| • 2m & 70cm SAT preamps | High performance SAT preamps design by ON6UG | |
| • 3 way ant coupler 145MHz | A 3 way antenna coupler / combiner for 2m band | |
| Modifications & various | ||
| • IC-7610 DPD feature | Checking the effect of Digital Pre Distortion on IC-7610 satnd-alone and with SPE power amplifier | • IC-746PRO GPSDO Sync | Improving IC-746PRO / IC-7400 frequency stability by sync'ing MO to a GPSDO |
| • Repairing SPE 1k3 PA | Replacing the LDMOS 1k25 by 1k8 in SPE Expert 1k3 Power Amplifier | |
| • Repairing ACOM 1200S PA | Replacing the LDMOS BLF188XR by MRFX1k80 in ACOM 1200S Power Amplifier | |
| • SIGNALINK USB | Improving the performance of TIGERTRONICS SIGNALINK USB modem | |
| • TM-D710 Ceramic Filters | Curing the IF Ceramic Filters breakdown due to design flaw | |
| • Motorola GP-300 HAM | Reprogramming GP-300 handheld to HAM frequencies with your own interface | |
| • EMI / EMC by LED lights | Eliminating radio interference caused by LED (flood) lights | |
| • IC-706 MkII frontend filter | An add-on bandpass filter to eliminate intermods on 20m band | |
| • Mobile TRX display | Replace the baclklight LEDs by high intensity white LEDs (IC-E2820 & TM-D710) | |
| • Eco START-STOP disable | A circuit to disable the START-STOP feature of your car |