Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Ken -
More likely a Bias supply failure. Probably a shorted electrolytic capacitor in the AC-4.
The Bias supply should read approximately -65 VDC at the transceiver. Most all the AC-4 power supply filter caps are years past their life expectancy and are just waiting for the most inopportune time to die!
The AC-4R board/kit from Mike Bryce at the Heathkitshop is the ideal way to deal with the problem, and set your supply to work for the next 30 years.
73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B & C-Line Service Supplement CDs <www.k4oah.com> Ken Bessler wrote:
Ken Bessler <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- I turned on my TR4 this morning to find it deaf. I tried tuning up and found the plate meter would peg on tx even with the power turned all the way down. What's more, I have to give the old girl a "thump" to get her to unkey now. I know - TX/RX relay.... How do I remove it and test it? Where can I get a replacement? Is it the relay or am I guessing wrong? Ken
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