[Antennas] L & C Calculator
Dave Fouchey
[email protected]
2002年4月21日 16:30:26 -0400
Mike the ARRL actually had two versions that I know of, have them both and
no neither is for sale!<G>, one was the large circular one you refer to and
the other was a more classic "slide rule" type. Not sure WHY they stopped
making them but I sure wish they would return them to production.
Ed, I hate to drag you into a discussion from another list but any
comments on these?
73's
Dave
WA4EMR
Sterling Heights, MI
At 11:41 AM 4/21/2002 -0500, Mike J Maloney wrote:
>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
>>>> - - -
>>>> Your moderator for this list is:
>> Larry Wilson KE1HZ [email protected]
>> _______________________________________________
>> Antennas mailing list
>> [email protected]
>> http://mailman.qth.net/mailman/listinfo/antennas
>>- - -
>>Your moderator for this list is:
>Larry Wilson KE1HZ [email protected]
>_______________________________________________
>Antennas mailing list
>[email protected]
>http://mailman.qth.net/mailman/listinfo/antennas