[Antennas] L & C Calculator
Mike J Maloney
[email protected]
2002年4月21日 11:41:57 -0500
Tom, The best was the "ARRL Lightning Calculator", a circular calculator,
that not only did F, L, and C, but also did coil calculations. Other
than from a vintage radio list, or ebay, I wouldnt know how to come up
with one. The one I have is a laminated XEROX version, sent me by
someone years ago as a request. I would give 15ドル-20 for an original in
clean working condition. If it is just L, C and Freq you are
interested in, you can memorize the constant 25330.
Divide this constant by Freq (MHz) squared and you have the LC product
for that freq. Divide by known L or C to get unknown. If you know
the L and C, divide the LC product into 25330 and the square root of the
answer is the Freq. in MegaHertz.
73, Mike, ac5p
(the above constant works for L in uH, and C in pF).
On 2002年4月19日 17:50:09 -0400 "Tom Bates" <[email protected]> writes:
> Greetings...
> Anyone know where I can find one of those old cardboard slide
> rule calculator
> gadgets which was used to find L, C, or Res Freq when 2 of the 3
> variables were
> known ? I think Allied used to sell them years ago.
> Thanks es 73, Tom AA1NZ
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