mrfx1k80 first run
First test run of the big amp.
Метка: hf
Continue working on SDR Box
Just photos: Arduino nano to convert BCD (Binary-coded decimal) codes for LPF to codes for BPF (they have different encoding for bands,
Packages — fans arrived
48v fans for amplifier.
5w HF amplifier
It’s for using TRX-DUO as signal generator. I remember that I have old kit with IRF510. I bought it as assembled in
Received big radiator, but…
Something went wrong while transporting. I still can use it, but it’s not cool. I spent 30$ for radiator and 30$ for
Test amplifier with mrf9120
Just received a few mrf9180 and one mrf9120, decided to finally test it with mrf9120. Looks like i need to fully rebuild
Some LPF measurements and settings.
Tuning LPF
Dead mrf9180 inside
I was doing some measurements and accidentally disconnected supply power with connected power input from driver. So gates got more than negative 0.5v and right gate has died.
MRF9180 amplifier — feeding transistor via balancing choke
Let’s try to add balancing choke to the schematics — feed sources from 4 turn choke for each transistor (8 turns summary) with power connected to the central point.
Homemade SDR Transceivers
Homemade SDR Transceivers based on demo or datasheet modules.