My creaking went away after a while.
Buck, k4ia
Honor Roll
8BDXCC
EasyWayHamBooks.com
On 9/30/2019 1:21 PM, Michael Walker wrote:
The creaking is due to the Heatsink expanding and contracting and the
screws trying to hold them in place.
It is normal and if you loosen screws, you may hear the noise go away. If
you tighten them, you might break the screws.
I'm not sure which way it will go, but it is normal.
Mike va3mw
On Mon, Sep 30, 2019 at 1:32 PM Bob McGraw K4TAX <[email protected]>
wrote:
Phil et al;
My factory built KPA500 did a good be of cracking and popping for 3 or 4
months when first received. But it has stopped. Guess all the metal
parts settled into a comfortable position and all is now well. I
considered opening it up, tightening or loosing bolts and screws. But
procrastinator me just waited and it stopped by itself. I think
that's good.
Love the amp, it is a great performer.
73
Bob, K4TAX
On 9/30/2019 7:59 AM, Phillip Zminda wrote:
My kit-built KPA-500 is about 8 months old. Lately I’ve been running a
lot of FT8 and FT4 at around 150 to 200 watts. I have really noticed a lot
of loud creaking from the KPA-500 after a few QSOs on digital modes. The
manual does indicate that some noise is normal but this does seem
excessive, I don’t recall noticing it when on CW or SSB, although I haven’t
done much contesting where the amp would have a lot of running time.
I expect I may need to tighten some screws inside. I really don’t want
to do any more disassembly than necessary and would prefer not to ship back
to Elecraft either. What is the likely culprit and how much disassembly is
required to get to the necessary screws?
Thanks,
Phil N3ZP
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