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KPA-500 clicking as the temperature changes

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Howard Sherer

KPA-500 clicking as the temperature changes

I have had a KPA500 for many years and the only annoying thing is that I
hear clicking of the metal case parts as it heats up and cools down. all of
the case screws are tight and I had this problem from the early days even
before I had to remove the RF deck and send it to the factory for minor
repairs 2 years ago.

I don't think there is a way to find the source of the clicking unless I
bypass the interlock and run it with the case panels off. Have others had
this occur and if so did you find the source and solution?

Howard
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Nr4c

Re: KPA-500 clicking as the temperature changes

I think it’s the “Z” bracket inside.

Sent from my iPhone
...nr4c. bill

> On Jun 25, 2020, at 10:12 AM, Howard Sherer <[hidden email]> wrote:
>
> I have had a KPA500 for many years and the only annoying thing is that I
> hear clicking of the metal case parts as it heats up and cools down. all of
> the case screws are tight and I had this problem from the early days even
> before I had to remove the RF deck and send it to the factory for minor
> repairs 2 years ago.
>
> I don't think there is a way to find the source of the clicking unless I
> bypass the interlock and run it with the case panels off. Have others had
> this occur and if so did you find the source and solution?
>
> Howard
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

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Elecraft mailing list

Re: KPA-500 clicking as the temperature changes

I have KPA500 SN 00149. Mine is a kit and it hasn’t had a lid off since I finished building it July 2, 2011, almost 9 years ago,. Like the rest, I heard clicking for a while and all of a sudden it stopped or I just no longer hear it. I think it stopped. Whatever was clicking found its happy spot.

The build: https://www.flickr.com/photos/ak5x/albums/72157626974789347/with/5894606802/

73, Bill-AK5X

> On Jun 25, 2020, at 9:34 AM, Nr4c <[hidden email]> wrote:
>
> I think it’s the “Z” bracket inside.
>
> Sent from my iPhone
> ...nr4c. bill
>
>
>> On Jun 25, 2020, at 10:12 AM, Howard Sherer <[hidden email]> wrote:
>>
>> I have had a KPA500 for many years and the only annoying thing is that I
>> hear clicking of the metal case parts as it heats up and cools down. all of
>> the case screws are tight and I had this problem from the early days even
>> before I had to remove the RF deck and send it to the factory for minor
>> repairs 2 years ago.
>>
>> I don't think there is a way to find the source of the clicking unless I
>> bypass the interlock and run it with the case panels off. Have others had
>> this occur and if so did you find the source and solution?
>>
>> Howard
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]