Remote antenna switch

16/01/2013 graat 0

As a result of the solid state protection found on this web-page I decided to play with a remote antenna switch which could switch up […]

HF amplifier 2 x GS31

12/11/2011 graat 0

Below you see some pictures of my HF amplifier. I used some chain gearing to move a pot-meter together with the vacuum caps and the […]

PCB low pass filters

25/11/2009 graat 0

In a discussion I had with Peter, SM2CEW and Graham, F5VHX, the idea grew to make simple low pass filters. Simple but suitable for fairly […]

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