The PA3CSG website

The PA3CSG website

Ham Radio from HF to SHF

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100 – 1000 MHz

Power spike / Overshoot on transmit for Yaesu FT-736 & FT-790 and Kenwood TR-9000

22/03/2020 graat 0

In order to solve some problems with solid state amplifiers, my friend Jack PE1KXH measured the power spike of some transceivers. The first exercise was […]

PG103 Preamp with filter for 144 MHz.

18/04/2021 graat 0

Leo ON6LEO needed a preamp as a second stage. I needed a preamp for 432 MHz and also one as a broadband measurement preamp. The […]

Diplexer 10MHz & 432MHz

10MHz & 432MHZ Diplexer

10/05/2021 graat 0

I was in need for a 10 MHz and 432 MHz diplexer. Low power in order to feed a 10MHz signal on the same coax […]

432MHz filter from Ali Express

15/10/2021 graat 0

I needed a low pass filter for 432MHz and as usual Ali Express has a solution not to expensive. These were 400-470 MHz low pass […]

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