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: [email protected] [mailto:elecraft- > [email protected]] 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 > __________________________________________________________ > ____ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
