0 – 100 MHz – The PA3CSG website

30/12/2020 graat 0

The PASTA-Meter Version III of the power and SWR meter. This time with nextion TFT screen. Because of TFT screen it looks nice and for […]

30/06/2015 graat 0

0-10 MHz receive over UTP? For a long time I had the idea to use UTP (Unshielded Twisted Pair) cable for my receive antenna, […]

03/02/2015 graat 0

50 MHz Bandpass filter The last band for this filter was the 50 MHz band. With 6 turns inductor and a 22 pF capacitor it […]

03/02/2015 graat 0

70 MHz bandpass filter When working on the 144 MHz bandpass filters, these were tunable over such a wide range that 70 MHz was almost […]

22/12/2018 graat 0

In order to provide a more clear overview on the protection system. You will find the blockdiagram below: It consists of the Power / SWR […]

10/04/2017 graat 0

The AD8307 is a nice logarithmic amplifier with a lot of uses for amateur radio. My SWR Power meter is build around it. (LINK) The […]

24/12/2018 graat 0

Introduction For my new to build HF PA I was looking for 3 turns counters for vacuum capacitor and / or a roller inductor. These […]

21/12/2018 graat 0

I broke my plate choke! It was too close to the coolers of the GS35 in the amplifier. The result was a burned choke. I […]

05/05/2019 graat 0

On his webpage Hans published his GPS receiver already a long time ago. It can be found HERE As an extra Hans put in the […]

27/07/2017 graat 0

For my newly build 50-70 MHz amplifier I needed a suitable driver. I needed about 5W drive. I started with a CATV module, the BGY888. […]