[Elecraft] K3 Apparent PA failure ?

[Martin Sole]

Hi,

Well I've been through all of the operational settings. CONFIG : TUN PWR 
is set to NOR and I can vary the power with the power control but the 
output meter display stays at 0.0 and the VSWR displays only - - . I had 
a settings save from about a month ago but uploading that hasn't changed 
anything.

Since this affects both the 100 watt PA and the LPA I'm guessing the 100 
watt PA is probably good and that the failure must be earlier on.

My next test is to look at the XVTR output as I see that is taken off 
before both amplifiers to see if there is anything there.

Martin, HS0ZED


>> Hi,
>>
>> My K3 died today, somehow. The radio works fine on receive and 
>> appears to transmit just there is no power indication on my external 
>> meter or on the front panel when pressing TUNE. There is ALC 
>> indication but no power out indication.The only thing I did different 
>> was to switch off the supply before the radio, something I normally 
>> never do. Having noted others having issues with that I reloaded the 
>> firmware. Still no output. Starting to think that somehow the PA is 
>> fried or possibly the driver as there is nothing from the 10 watt PA 
>> either. Tried turning the power down and putting the KPA3 into 
>> bypass. Still no power output. Not sure what else to try before I 
>> tear into it. Was going great, worked 3B7A on 3 bands today no problem.
>>
>> Suggestions appreciated.
>>
>> Thanks
>> Martin, HS0ZED
>>
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