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Old 20th Feb 2009, 9:28 am   #12
John M0GLN
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Join Date: Jan 2004
Location: Southport, Merseyside, UK.
Posts: 1,156
Default Re: Measuring Resonant Frequency

Quote:
Originally Posted by Skywave View Post
Here's the germ of an idea that you might like to investigate to develop your work into a useful piece of test gear.
That's an interesting little project and something I might do Al, I've already found the circuit very useful, in addition to its initial purpose, which was to check that the var' cap' I had would resonate at the right frequency with the coil I had just wound, I've been using it to check out the value of a couple of chokes, I've got a few 1% silver mica's and using a 100pf and 390pf in turn across the chokes to double check, I measured the two resonant frequencies, putting these values into the site that Sean listed http://www.deephaven.co.uk/lc.html gave me the inductance, but doing it with a calibrated var' cap' as you suggest would make it easier.

John
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