Projects

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
A R D U I N O    
      • 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
      • 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
      • DTMF WatchGuard script   A small script to kill certain DTMF codes received and temporarily suspend DTMF decoding
Antenna's    
      • 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  
      • IC-706 MkII frontend filter   An add-on bandpass filter to eliminate intermods on 20m band
      • IC-E2820 display   Replace the baclklight LEDs by high intensity white LEDs