[Elecraft] KPA500 Assembly Question

[Gary Hinson]

Hi Dave.

I can't say for sure but the original screws for the plate were a fraction
too long, causing "pops" when the PA heated up due to thermal expansion.
Some of us simply filed a fraction off the original screws to seat the plate
more tightly, and that solved out problem.    In other words, slightly short
screws are better.

4-to-5 threads sounds to me like it ought to work OK, so I'd settle for that
... but like you I'd be a bit concerned about the inventory of parts, just
in case those screws are destined to be used elsewhere.  Are you sure there
are no other screws in a little additional envelope somewhere?  

73
Gary  ZL2iFB   (*very* happy owner and daily user of a KPA500 - love the QRQ
QSK and no-tune QSYs)

> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
> bounces at mailman.qth.net] On Behalf Of Dave Anderson, K4SV
> Sent: Tuesday, 20 March 2012 3:16 p.m.
> To: Elecraft
> Subject: [Elecraft] KPA500 Assembly Question
> 
> Hi All,
> 
> Thought I would bounce this question off those who have assembled the
> KPA500.
> 
> I am building Serial #439
> 
> I am at page 22 where it says to install 5 - 5/16" Black Flat Head screws
in the
> plate attached to the PA.  I can not find any 5/16" screws in the hardware
> bag.  I found two in the spares bag and two installed in the AC fuse
> block.  Checked everything else.  Stephanie either missed it totally or
the
> manual is incorrect.  Up to this point she has been spot on.
> 
> Could this be an error where they really meant to use 3/16"?  I tried
3/16"
> and they have 4 to 5 threads into the heatsink.
> 
> Suggestions?
> 
> Thanks in advance,
> 
> Dave Anderson, K4SV
> Tryon, NC
>  828 777-5088
> 
> www.K4SV.com
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