Jack -
Check the voltages and resistances around the AF Output tube.
Cathode resistor, cathode bypass cap, B+ decoupling cap, plate
decoupling resistor, output transformer.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>
Jack Dunigan wrote:
I just received a TR3 in excellent condition and was in the process of
troubleshooting looking for potential problems. All was well when
after about 30 minutes it lost all sound on receive and the S meter
pegged at over 60 on the right side of the scale when the Function
control is set to SSB (It is slightly less on X-CW and X-AM). I had
successfully completed a Bias adjustment and tune-up on the 20 meter
band. It was (and is) connected to my antenna system. I had also
finished the Carrier Balance Control Adjustment when the sound through
the speaker dropped off suddenly and the meter pegged.
I went through the tubes, substituting one by one. No change. I
suspect one or more of the capacitors have failed. Before I start
swapping them out, am I on the right track or what?
Jack
NP2OR
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