Tom - Sounds like you may have a bad crystal. They DO go bad.
Easiest is to connect a DMM or VTVM to the test point on top of the chassis just behind the S-Meter. You should measure a volt or so of negative voltage, and it should be about the same on the 40, 15 and 10M BAND switch positions.
You could try listening on a separate receiver that covers 21.5 MHZ if available. You might need to run a wire from the receiver antenna lead near the tube V1, right behind the S-Meter.
73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement CDs <www.k4oah.com> Tom McDaris wrote:
I have a TR4-C with good output everywhere but 40 meters. On 40 I get nothing. ZIP! I get idle current but when you try the tune-up, nothing happens. I have cleaned the band switch with alcohol & Q-tip. I cleaned the crystal pins with alcohol. I tried the alignment procedure in the TR-4 manual. Nothing. Any suggestions would be appreciated. 73 AB8BW
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