w3nr@vol.com asks
> Is it really necessary to use silver mica's for a tuned input ? ,
>or will
>disc ceramics suffice ? If silver mica's are needed, does anyone have a
>surplus supplier or is a trip to Mouser in order. Thanks 73...
Depends. SM are usually more forgiving of RF and power and more stable in
value than ceramics. Having said that -- NP0 ceramics change value less
from heating than SM.
So your answer is "it depends," based on a lot of information not in the
original question. If you're not going to destroy thousands of dollars of
stuff if you blow up a cap, I'd start with whatever was in the junk box or
was readily available.
Of course, Mouser ships fast, is relatively inexpensive, and won't kill you
on small orders.
Jim N6OTQ
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