Modifying MRF9180 board to RD100 with separate bias
Experiment failed — to much problems, but I decided to post it here anyway.
Метка: mrf9180
Test amplifier with mrf9120
Just received a few mrf9180 and one mrf9120, decided to finally test it with mrf9120.
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.
MRF9180 HF amplifier, BFG591 as driver.
BFG591 as driver.
MRF9180 HF amplifier.
Based on mr9120 aliexpress kit.
Dead mrf transistors inside
Pictures of mrf186 and mrf9120