Cecil Moore wrote in news:9pf8i.10153$4Y.6557
@newssvr19.news.prodigy.net:
wrote:
All I
want to know is if the toroids would be any good for HF 1:1 baluns.
An antenna analyzer, like the MFJ-259B, is a very
useful piece of test equipment for all types of
measurements of this kind. Using the MFJ-259B, I
....
The '259B is no doubt a handy device, but very limited for measuring
components. Have you tried to measure at an inductance that has more than
250 ohms of reactance at some frequency of interest? Have you tried to
explore self resonance of a coil..., invariably it runs into the same
problem of inductive reactance going off scale way below the point at
which self resonance bites in.
When talking about ferrite or powdered iron cored inductors of reactance
over 200 ohms, where mu is frequency dependent and flux dependent, I find
the '259B nearly useless.
Owen