[R-390] Silver Mica versus C0G/NPO ceramic ?

[bill kirkland]

The C0G ceramics cost quite a bit less than silver mica and from
 A quick review of the specs appear to be as good or better than silver mica
	- temp comp equivalent or better
	- voltage stable, ie. Value doesn't vary with voltage (only C0G)

So if a silver mica was used in the old gear why not replace it with a C0G
ceramic?
 -e.g. oscillators, tuned circuits, IF transformers.



-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of Charles P. Steinmetz
Sent: January-09-12 5:56 PM
To: R-390 at mailman.qth.net
Subject: Re: [R-390] Silver Mica versus C0G/NPO ceramic ?


>Any thoughts on silver Mica versus C0G/NPO ceramic ?

For what?  (As you noted, C0G has a better tempco than 
silver-mica.  What other characteristics are important in your application?)

Best regards,

Charles





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