Re: KPA500 Clicks & Pops

Posted by Don Wilhelm on Oct 16, 2018; 10:20pm
URL: http://elecraft.85.s1.nabble.com/KPA500-Clicks-Pops-tp7645665p7645703.html

All,

If you can figure out how to keep the relatively thin "Z" panel from
expanding and contracting as it is heated and cooled, you will have a
solution to the problem.

It reminds me of my childhood days living with a coal furnace.  The
furnace had an inner cast iron furnace surrounded by a sheet metal shell
as the air plenum.
It was comforting on a cold winter's morning to hear that sheet metal
expanding because that was the 1st indication that warm air was coming.

It was my job to shake down the ashes, put coal in and stoke up the fire
in the mornings.

73,
Don W3FPR

On 10/16/2018 5:59 PM, Bob McGraw K4TAX wrote:

> I do run 400 watts or so on digital modes.  Issues are not really noted on SSB or CW modes.
>
> I've set the Fan Ctr to 2 and 3 and still noted the issue
>
> Was recently showing my K Line to some hams friends. They commented rather negatively on the point.
>
> Bob, K4TAX
>
>
> Sent from my iPhone
>
>> On Oct 16, 2018, at 4:52 PM, Dauer, Edward <[hidden email]> wrote:
>>
>>
>> I've not experienced the problem with kit-built S/N 0651.  But then, I have never used it on high duty cycle data modes.
>>
>> Ted, KN1CBR
>>
>>
>>
>>     ------------------------------
>>
>>     Message: 25
>>     Date: Tue, 16 Oct 2018 14:13:55 -0700
>>     From: Dennis Moore <[hidden email]>
>>     To: Elecraft Reflector <[hidden email]>
>>     Subject: Re: [Elecraft] KPA500 Clicks & Pops
>>     Message-ID: <[hidden email]>
>>     Content-Type: text/plain; charset=utf-8; format=flowed
>>
>>     I rarely hear anything from my KPA500-F. Serious question, I wonder if
>>     those with the kit experience more noise than those with factory
>>     assembled units?
>>
>>     Dennis NJ6G
>>
>>
>>
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>
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