pb1433 rf board output of Q104 board pin 14 going into t3 is a beautiful sine wave. output of t3 going to board input pin 15 is trashy noisy. I sprayed the band selector wafers with deoxit and gave it a good workout but it is still the same. dirty signal.
what can i do to fix this?? Is the noise caused by the resistors??
The board produces no tx output. SN7400 output is good, Q106 swapped out with a good one, rf no output, Q105 replaced with a good one, no output.
removed Q105 and q106. Placed good rf board and bad one side by side and ohmed it out compairing readings and are reading identical.I am at a loss, it should work but does not. !!.
anyone with RF board experience advice would be greatly appreciated.
Thanks, Robert KH2BR
?
