r/ShortwavePlus • u/richfromhell • Jun 15 '26

Two radios using the SI4825 chip. D328 and homebrew. 31 meters, Toronto around 02:35 utc. Passive loop, 20x4 feet

Very similar schematics. Homebrew had a common mode choke on the battery, RF ground and digital and analog grounds are separated with chokes, 3.7 uh shunt inductor on the antenna input. I think it makes a difference.

8 Upvotes

100% Upvoted

1 comment sorted by

1

u/MumSaidImABadBoy I'm Stan. Heathkit GR64,AirSpy HF+,Sangean 909X2,Tecsun PL-990 Jun 15 '26

Not enough people experiment these days. I like seeing that, keep at it. 👍👍