I just finished up the RF board and am proceeding to the testing. Much to my
dismay, however, I got no power output when I tried to
adjust the 40 m BPF. I'm getting 13.5 v to all of the collectors and I pull
220 ma on receive and 420 ma on tune.
The RF detector resistors and diode are correct and the transformers look good.
With an RF probe I get zero volts on the xmit mixer output (U10 pin 4).
So I went back further and did some basic voltage checks and found some
interesting results. The key down voltage on the anode of D7 is
0 v when it should be 8 v. The anode voltage on D6 is 0.645 v on key down
instead of 0 v. On receive it is 8v.
I'm having some trouble getting my head around how this relates to my lack of
output power. Another symptom I'm having is that the menu and display controls
cease to function when I plug in a straight key. But they work ok with a
paddle attached.
I feel a headache starting. Any suggestions on how to proceed?
Dazed and confused,
Bill, WV1N
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