Blog corrupt

This blog is currently not fully functional. The web application is corrupted for some unknown reason. So I have decided to migrate the content to Wordpress. Hopefully the blog is…

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Surplus Party in Zofingen 2017

Next Saturday in Zofingen - Surplus Party 2017 will happen. It is the biggest flea market in Switzerland from radio amateurs for radio amateurs! The flea market will be held…

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Morse-Trainer
Arduino based morse trainer

Morse-Trainer

More than ten years ago I created a  micro controller based morse code trainer. It was designed to process the morse code that someone entered by pressing a morse key…

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AM Modulator (2)
Schematics of an AM Modulator circuit

AM Modulator (2)

I did some further experiments with AM modulators. First I tried to use a NE612 as modulator. It works quite well, but requires some adjustments. Volker, SM5ZBS, describes such an…

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AM Modulator

In Europe a lot of AM transmitters for medium wave have been switched off. When you want to listen to an old AM receiver a small AM modulator can help…

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60m band in Switzerland

I found this today on the USKA's news page: Beginning with 1st of January 2017 the 60m band will available for HAM radio operators ins Switzerland. Allowed power is 15 Watts EIRP.…

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ICOM 736 repair
Repaired CAT interface

ICOM 736 repair

This year my ICOM 736 had some problems. The first issue was a failure in the CAT interface. At some point I noticed that my computer log could not communicate…

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QRP Transmitter for 80m
Simple 80 QRP Transmitter

QRP Transmitter for 80m

This weekend I found some time to work on a small QRP transmitter for the minimal art contest. It is based on my 40m transmitter I described here earlier. This is…

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Minimal Art Contest 2014

The results from the minimal art QRP contest 2014 can be found here. This year I participated the first time with a MAS12 transceiver. Unfortunately I had to support our local…

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