[AMRadio] 810's

Todd, KA1KAQ ka1kaq at gmail.com
Fri Aug 24 10:23:26 EDT 2007

Rick, it's been a while for me, but the main issue I recall was
expansion/contraction, with the envelope heating or cooling at a rate
that the glue couldn't match, resulting in cracked tube or broken
seal. It's been a long time though, so I really don't recall the

JB Weld is used on engines and other high temp applications as
mentioned, so it would probably be fine. I run 810s as modulators and
they do get hot, but I doubt it would be an issue.

Sometime somewhere, YEARS ago, I had the formula used by RCA for this
purpose. Maybe I'll find it during the move?

Good luck -

~ Todd,  KA1KAQ

On 8/23/07, Rick Brashear <rickbras at airmail.net> wrote:
> Whoa!  Is that regular JB Weld?  If so, that should do the trick quite well!
> Thanks,
> Rick/K5IAR
> I can only toss into the fray that JB Weld has PERSONALLY been used on an
> R/C helicopter muffler successfully for about ten years - keeping the two
> parts - fore & aft, together.
> That particular Helo burns methanol with 20% NitroMethane.
> If THAT doesn't hold up to a plate cap, I don't know what will.
> Bob - N0DGN
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