[Elecraft] AADE LC meter for ham radio

[Vic K2VCO]

Stephanie Maks wrote:

>  I  used 
> it quite a bit while building my K1 and K2, to verify the values  of 
> some of the hard-to-read caps, and verify the values of the  toroids I 
> was winding.

This comes up once in a while, and for the benefit of those (like 
Stephanie) who may not have seen it before:

The measured inductance of a toroid depends on the frequency at which 
it's measured because of the characteristics of the toroid material.  I 
don't know the frequency used by the AADE unit, but if it's far from the 
operating frequency of a particular toroid, the results might be misleading.

Elecraft has said that they do *not* recommend meauring toroid 
inductance, just winding the specified number of turns.

If you must measure the inductance of a toroid, it would be better to 
use something like an antenna analyzer which will allow you to select 
the frequency at which the measurement is made.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco