> In our lab, we've used the 5-minute epoxy you can buy at Home Depot,
> etc. for small potting jobs. We've measured very little change in Q
> or resonant frequency in the filters we've built for HF & VHF-Low
> band, so the dielectric properties are probably okay.
We use cold setting thermally conductive semi-flexible potting compounds for
commercial products, but I really prefer that spray foam insulation called
"Great Stuff" for my own stuff.
As a matter of fact, I usually don't even enclose the circuit boards. I just
Krylon spray them, then shoot em with Great Stuff. That way I can repair
stuff later if necessary.
73 Tom
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