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My name is Chris and from 1942. With a bachelor technical background (Ing) and 30 years of very interesting jobs in industrial medical and defence field.  I got early retirement in 2001 and decided to apply for my HAM licence which I aquired in 2007. I'm still rather inexperienced as a HAM "novice" but learning every time. Also I moved from Holland to Germany (hence my new callsign) From the start I tried to master CW but at this age I found out it is not that simple. I never came beyond 5 words per minute. So I'm concentrating now a bit on digital modes like PSK, SDR, APRS and lately D-Star as well as DMR. Experimenting and building various HF antenna's has my attention as well. I do have a rather well equiped mechanical (amateur) workshop with small milling machine, TIG- welding machine etc.

My station at this moment is a Flex 6300, Cubic Communications (TWE)  SSPA (1.2 KW) linear, LL-Tuner, MFJ-998 autotuner, Kenwood TH-D72E in my car, Kenwood TM-D710 as (I-gate APRS) base station, Hytera DMR  DM-785G,  and interfaces for PC connection in order to operate digital modes. Secundary Trx is Icom-7100 with LDG-100 Tuner. I'm also operating an AIS station for shipping positions.

Antenna  is  full wave 80m Sky-loop for HF, Fritzel FB23 beam for 10, 20 and 15m.

2m/ 70cm verticals

Recently I used for monitoring my TX signal a Red Pitaya receiver (with HPSDR) or SDRplay (with SDR-uno)

Also notice the automatic antenna switch (with vacuum relay) which grounds my  loop antenna when not in use and is controlled by PTT of my new linear.

The 2  images on the top represents a home-made  simple relay board which acts as a universal  interface when operating a linear via the PTT circuit. The relays either enable the PA and/ or interrupt the audio, speakers or 12V power to perifical equipment when operating the PTT. All this to prevent RF interference and crosstalk. There is also a terminal connection for a second transceiver isolated from the main transceiver.



Above are some pictures of my newly build 2KW- SSPA project according electrical design of W6PQL.

The mechanical parts are my own fantasy.

8259011 Last modified: 2017-08-07 06:07:55, 4862 bytes

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