[Elecraft] KPA500 troubles

Walter Underwood wunder at wunderwood.org
Sat Nov 14 01:40:26 EST 2015


Eric Swartz was very clear about this in a message to this group yesterday:

"Component failure like this can occur in any manufacturer's radio or amplifier for many reasons, such as power line surges, nearby lightning strikes, operating with excessive SWR, transmitting into a wrong antenna etc. You do not need to be operating on a particular band, or even have the amp or radio on to incur lightning damage. This can also cause partial damage to components that then shows up as a failure later after additional operation.”

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Nov 13, 2015, at 9:57 PM, Vic Rosenthal <k2vco.vic at gmail.com> wrote:
> 
> But why would a filter for a band that the operator had never used fail?
> 
> Vic 4X6GP/K2VCO 
> 
>> On 13 Nov 2015, at 11:52 PM, Wes (N7WS) <wes at triconet.org> wrote:
>> 
>> Why would one filter, that like just like all of the others is switched into the circuit by a relay on each end, fail while none of the others do not?
>> 
>>> On 11/11/2015 1:32 PM, Jim Brown wrote:
>>> 
>>> The LPF is on the output of the amplifier. One possible cause of failure could be lightning.
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