Hi Guys,
My T-4XC has stopped transmitting. I have normal idle current. But not
much more. If I turn the gain way up I can get a barely perceptible dip
in plate current.90 or 100 ma. So I turned the bias voltage all the way
down and put it in tune very briefly to see if the finals were at least
functional. I get about 260ma when I do that. I presume this means they
still work?
It looks like I have lost drive somewhere. I checked the carrier
oscillator and it is up and running, I can see it with a scope and a
freq counter. However, I don't see my 5.645 Mhz at the plate of V2 (IF
amp). I did a voltage check and all of the voltages on V2 look normal.
Then I did a resistance check on V2. I found everything normal except
the cathode measures 5.5k to ground. The book says it should measure
infinite. Is this potentially my problem or is this non critical. I
thought I would see if you guys think I am on the right track before I
start lifting one leg of every cap in that circuit.
Thanks,
Bob K6GGO
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