[Amps] plexiglas isolation in coils

[Peter Voelpel]

Hi Tom,

I always found the micro wave oven test helpful in advance when I had
materials to be crafted by someone else on a lathe or mill.
Is there any material which would pass that test but fail on HF?

73
Peter
 

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Tom W8JI
Sent: Mittwoch, 26. Juli 2006 23:05
To: Dick; amps at contesting.com
Subject: Re: [Amps] plexiglas isolation in coils

> I wonder if this is possible, because there might be high 
> voltage across the coil (several kV's),
> in case of a mismatch. What about the plexiglas? Can it 
> witstand this?

Dick,

There is no way possible to answer your question because it 
depends on the dielectric stress in the material. It would 
depend on electric field strength and how it is distributed 
even more than the material itself.

In almost any case I can think of, Plexiglas would be ok. 
The only problem would be if you had Plexiglas for a 
dielectric in a capacitor.

As for tests, how a material behaves at 2GHz generally has 
little to do with anything at HF. You are not looking for 
absorption at 2GHz. You are looking at LF performance. The 
best thing you can do is try it, and odds are the Plexiglas 
would be the last worry.

73 Tom 


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