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Excalibur works fine one day than not the next...

My Excalibur SSB, AM/FM/SSB/CW Transceiver just stops putting out and receiving,the next day it might start to work again,maybe not.I looked for cold solder joints,the power supply is adjusted to 13.5 volts,also the RF/SWR meter stopped working even when the rig worked.Any ideas you might have would sure be welcome,thankyou.

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Sounds like some loose solder joints. check power output with external meter to see if output is ok . i think youprobably have 2sc1969 finals init unles someone has changed them theyshould put about 25 watts if tuned correctly. also check the antenna a and antenna b switch to see if something has shorted across it inside cabinet.

Posted on Mar 18, 2010

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dobhan
  • 105 Answers

SOURCE: Base radio works when it feels like it.

If the swr does not deflect even you press the PTT it might be the power amplifier has the problem,pls check also your power supply it should be regulated nor constant voltage output....

Posted on May 09, 2008

6ya6ya
  • 2 Answers

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1 Answer

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Might be worth checking the microphone cable on the transceiver, specially near the plug, or the push to talk switch. I saw this umpteen years ago with a CB that was intermittent.

High voltage capacitors are a bit hard to find but look on the net for vintage radio suppliers. While you have the tube radio open, look for resistors that gone high, this can put higher voltages than design on the caps and of course can quickly wreck tubes that were otherwise OK.

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1 Answer

Base radio works when it feels like it.


If the swr does not deflect even you press the PTT it might be the power amplifier has the problem,pls check also your power supply it should be regulated nor constant voltage output....

Apr 23, 2008 | Radio Communications

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