[Elecraft] KPA500 no output

[Bob McGraw K4TAX]

A point of concern when using a non-Elecraft transceiver, be sure to set 
the correct value of power from the transceiver to the amp when the amp 
is active in operate mode    I find that 20 to 25 watts is adequate to 
drive my KPA500 to rated output.    With a different transceiver, I have 
switched it to drive the KPA500 and failed to reduce the power to the 
correct value.  Although I've not damaged my amp nor my transceiver, I 
really don't want to find out what might occur.    I know there is some 
protection built into the KPA500 for overdrive, but I prefer not to 
activate it.

With my K3S, when I switch the KPA500 to Operate, the transceiver is 
automatically reduced to the correct power to drive the amp.

73

Bob, K4TAX


> On 9/1/2019 2:29 PM, Lyn Norstad wrote:
>> UPDATE:
>>
>> I received my 6 week old KPA500 back from Elecraft on Friday. The 
>> good news is that it seems to be working as it should (rather than as 
>> it was …).  The bad news is that in its 6 weeks of life, it spent 4 
>> of those weeks back in the Elecraft hospital undergoing major (?) 
>> surgery.
>>
>> When it faulted and blew out the front end on my IC7300, it also took 
>> out its own TR circuit as well as its PA module.  Seven components 
>> were found to be defective, and one was actually missing.
>>
>> I’d be curious as to how “missing” happens … on a totally factory 
>> built unit.
>>
>> 73
>>
>> Lyn, WØLEN
>>
>>