[Lowfer] Interesting finding

Bill Ashlock [email protected]
Wed, 08 Oct 2003 12:33:49 -0400


Stewart, John, Dave, Dale, Mike, and all super high-Q capacitor users:

Thanks for the advice on a better cap than mica. I will check these out 
tonight as I have some in my 'overstocked surplus warehouse' (should anyone 
be a 'Bob and Ray' fan from way-back <G>).

I'm going for a capacitor Q  >10x the Q of the actual loop and his puts me 
in the 8000 region (yeah that's 8 thousand!). The latest measurements 
indicate a combined Q for the test loop and cap of 835. The normal goal of 
transmitting mica design is to keep the temperature low enough to prevent 
damage to the capacitor or prevent a large change in capacity - so heat 
sinking appears to be important. This isn't exactly my design goal at .1w. 
<G>

I'm beginning to wonder if any cap using thin aluminum will work in this 
application.

Bill A



x

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