I'm troubleshooting my TX stage (zero output) right now and would like to understand it better.
-Q9: Is this a 1:1 buffer? B and C have the same output on my scope.
-Is Q9 the carrier buffer, or is it the I/Q buffer?
-Q4: Is this the buffer for signal modulation?
-Q10 and Q6: Preamp? Is this a push pull setup? How does Q5 play into this and how does the feedback through the transformer play into the amp stage?
-Q7 and 8: Final power amplification correct?
Sorry if this is a bunch of complicated questions, or if I'm way out in left field. I'm just trying to understand the radio better. I'm just going point to point until I see were the fault is. Thanks for looking.