[Elecraft] KPA500 Standby to Operate problem

[Michael Shortland]

My KPA500 [#934] has developed a fault in Receive mode.   The strength of the signal received by the K3 driving the amplifier reduces significantly when the KPA500 is switched from Standby to Operate using the front panel pushbutton.  The S meter displays a 3 to 5  ‘S’ point reduction in signal strength on all bands when this happens.   The amplifier appears to operate correctly in all other respects and will deliver 500W to my KAT500.    No fault is indicated on the amplifier front panel.

Is this a known problem, eg a faulty TR Switch?

73 Mike G0EFO


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