Hello Evan,
I tried that yesterday, and found that the resistance remains below 1 k.
Another fact was that the DC voltage on gates with power, at minimal drive and PTT on didn't change as expected.?
That's why I asked if the MOSFETs can be partially damaged, so that they don't get shorted, but their gate to source resistance is reduced.
Another possibility is that TVS D8 and D9 got thermally damaged.?
One thing that I don't understand, is why the AC voltage on the output of the transformer is lower than on the input.?
However, if something overload the transformer's output, the current consumption should increase, not decrease.
I experience the drop of the current consumption. It was up to 6 A on 40 m, and up to 3A on 10 m.
Now it increases to ca. 1A only.
That supports the theory that the problem results from the damage of final MOSFETs.?
Anyway, it seems that I have to disassemble my device fully, remove the MOSFETs and test them.
73,
Wojtek?
