>>Any problem using 500 volt ceramic disc caps for the larger values and
>>silver mica for the smaller ones.
>The disc ceramics should be NPO or N750 types, Steve
Why NPO? With Q=2 Bandwidth (-3db) of the tuned circuit
is F/Q = .5*F or 50%
10% change in capacitance would only produce 5% shift in frequency.
One advantage in using higher voltage capacitors is that they are
physically larger and can handle more RF current due to the larger
surface area.
73
Bill wa4lav
William L. Fuqua III P.E. E-mail WLFUQU00@POP.UKY.EDU Phone (606) 257-4155
Department of Physics and Astronomy CP-177 Chem. Phys. Bldg.
University of Kentucky , Lexington, Ky 40506-0055
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