[Amps] measuring rf colis

[Scott Townley]

Probably at low-frequency...like 1kHz or so.
Remember the RF devices will measure a coil's *apparent* inductance, 
meaning inductance together with distributed capacitance plus any stray 
capacitance to ground.  Typically the apparent inductance will increase as 
one approaches the first self-resonance (which is parallel in a solenoidal 
coil) and then decrease past that, nearing zero at the first series resonance.
Terman (Radio Engineers Handbook) shows how to do lots of fun calculations 
on coils and self-resonance.

At 17:51 2006-01-24, Partain, Chuck wrote:
>probably touched upon 10k times but..
>
>Using my MFJ-259b, measuring some rf coils I have here, sweep the frequency...
>all coils I have, move all over the place. Is there a standard frequency 
>these are rated at?
>
>say a coil is advertised at 10uh. at what frequency? I can pretty much 
>determine the current
>by the size of the wire...??
>
>chuck
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