No replies to this one yet, but I have spent a bit of time looking over
the schematic and poking around with my DMM scope. Here's what I've
found so far:
TX (RD4 on the control board MCU) is normally low, 8T is 0 volts. When
transmitting, TX goes high, Q3 turns on Q1 and 8T becomes 8 volts.
RX
I've just completed part 2 of my K2 RF board. I seem to have a problem
on receive. I get no audio, and the S meter is reading maximum. If I
select any of the CAL menu items or the ATU menu item, the receiver and
S meter work normally. As soon as I exit the menu, it goes back to no
audio and the S
2 matches
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