[time-nuts] GPS antenna in silicon/RTV encapsulation

[Jim Lux]

On 4/17/14, 11:09 AM, Lester Veenstra wrote:
> The classic DIY test of material for RF use is give it 60 seconds in a
> microwave oven.
> If it gets warm, it’s not a good candidate.
>

that's fine if you're looking for a gross measure of suitability.

If you're concerned about things like dielectric constant or tenths of a 
dB, that's probably not as good a test.

That is, getting warm in a microwave is a sign of "certainly not 
suitable", but not getting warm is not a sign of suitable.