RadioBanter - View Single Post - Trying to find out what Ferrite material this is.

Cecil Moore[_2_] · June 2nd 07, 03:46 PM posted to rec.radio.amateur.antenna

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
discovered that the Amidon brochure, "showing typical
'Z' in ohms for one turn at 25 MHz", is misleading.
Their "one turn" goes through the core twice which
I consider as being two turns. That's bad news for
w2du baluns.

If you could gain access to an MFJ-259B, you could
run the same kind of measurement on your toroids.
Heck, if you send one to me, I will run the experiment
and send it back to you.
--
73, Cecil http://www.w5dxp.com