Hi Dave
I didn't know that Elecraft had a fix for this. I will send Tech Support
an email and ask them about it. My Amp is fairly new. I built the kit
last May. The serial number is 1469.
--
73
Steve AI9T
http://www.ai9t.com
AI9T DX Cluster
Version 4 AI9T Telnet: dxc.ai9t.com port 7300
Version 6 AI9T-2 Telnet: dxc.ai9t.com port 7373 (CW + Skimmer)
On 1/27/2014 3:27 PM, Dave Perry wrote:
Steve,
My KPA500 also has the clicks and pops as it heats up and expands. As I
recall, Elecraft offers a fix for this. The fix involves replacing the
metal screws that fasten the heat sink to the chassis. They had to go with
a larger screw to obtain a tighter hold on the bracket for the heat sink. I
assume this has been fixed in newer models. My serial number is in the low
200s. I have never bothered to install this fix, but the clicks do get
annoying at times. Is this fix still available? I would think that you can
search the archives for a discussion on this topic right after the amp came
out.
73,
Dave, N4QS
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Steve AI9T
Sent: Monday, January 27, 2014 1:05 PM
To: [email protected]
Subject: Re: [Elecraft] KPA500 Clicks
Thanks for all the comments on the KPA500 Clicks. Looks like I'm not the
only one that has noticed it. I guess I won't worry about it.
I have had the AMP for a few months now and have been very satisfied with it
so far.
Thanks again!
--
73
Steve AI9T
http://www.ai9t.com
AI9T DX Cluster
Version 4 AI9T Telnet: dxc.ai9t.com port 7300
Version 6 AI9T-2 Telnet: dxc.ai9t.com port 7373 (CW + Skimmer)
On 1/26/2014 3:03 PM, Steve AI9T wrote:
During a couple recent RTTY contest I have noticed that my KPA500 is
making a noise. It kind of sounds like a relay clicking in and out.
When I first noticed it I thought it was a fan relay or something to
do with the fan. But after hearing this longer it seems to be related
to the temp. It clicks in an out around the temps of 62C and 56C. It
kind or reminds me of an old radiator warming up and cooling off. I
took the cover off yesterday and checked the nut that holds the
transformer in place. I thought maybe that spring washer might be a
little loose but it wasn't.
Anyone else ever notice this? Hopefully it is not a serious problem.
Thanks
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