One more point about "loose" screws or nuts and Loctite. Any place the
hardware is going thru a PC board (or any material that will cold flow at
the pressures we get) , after a period of time there will be some "cold
flow" of the board and Loctite will not fix that. Hopefully the split lock
washers will minimize the effect . I had two transceivers from another
American manufacturer even with split locks and the tx ALC would get
unstable about once a year or two and just tightening all the grounding
screws around the boards would tame it down for another year. I suspect if
I kept them for long enough the clod flow would finally stop.
Hank K7HP
From: Don Wilhelm
Sent: Thursday, June 18, 2015 7:05 AM
To: [email protected]
Subject: Re: [Elecraft] Loctite
Mainly for kit builders --
Because the screws are stainless steel but are threaded into aluminum,
there is a small chance of a slight galling of the threads, making it
impossible to fully tighten the screw. A bit of light oil the first
time a screw is inserted would my choice rather than a thread locking
compound. If the oil drips, you have too much on - wipe the threads
with a cloth, there will be enough remaining to do the job.
The black screws are *supposed* to be an aid in tightening, but a little
bit of extra gives that last bit of assurance.
I will repeat my caution to use a good #1 Phillips screwdriver to keep
from rounding out the screw heads. If you can see shiny spots on the
screwdriver tip, replace it with a new one.
73,
Don W3FPR
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