[time-nuts] Re: Potting compound advice needed

[Gregory Beat]

Rick -

Look at 3M Scotch-Weld Epoxy Potting Compound DP270.
https://www.3m.com/3M/en_US/p/d/b40066438/
I purchase from McMaster-Carr (Midwest pickup window is 2 miles from house).

This is what I have used, since it is rated for -65° to 350° F and safe with copper (potting electronics, transformers, etc.)

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Date: Wed, 10 Nov 2021 14:40:53 -0800
From: "Richard (Rick) Karlquist" <richard at karlquist.com>
Subject: [time-nuts] Potting compound advice needed
To: time and frequency measurement <time-nuts at lists.febo.com>T
I am looking for help choosing a potting compound that
has the following properties:

1.  Good for 5,000VAC @ 1 MHz
2.  Low RF losses.
3.  Low permittivity is preferred
4.  Low tempco of permittivity is a want.
5.  Something I can implement in my home shop without access to a vacuum pump etc. is a want.

Thanks in advance

Rick Karlquist N6RK