On 11/10/21 2:40 PM, Richard (Rick) Karlquist wrote:
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
After consulting the experts at work, what they use for this kind of
thing (HVPS, high power RF, etc.) is:
https://www.elantas.com/pdg/products/tooling-composites-materials/gel-encapsulants-sealants.html
Elantas EN-11 (Conap) Casting, Potting and Molding Compound.
epsilon of 2.9 @ 1 MHz
610 V/mil breakdown
tan d of 0.009 at 1 MHz
8 hour cure at 80C, more than a week at 25C. 50 min pot life
your challenge may be finding it in small quantities - a casual search
shows gallon cans at just under $200, and I'm not sure that you don't
need to buy a part a and a part b.
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