Hi Jim and all the LF group,
I've actually used some core of TV EHT transformer for
the output transformer of amplifiers in the 300-500W range
and they performed weel indeed; one of these had the two halves
glued together so there was no way to modify the gap, while
in the others I removed only one of the thin plastic spacers.
I didn't try removing both since the inductance I obtained
was enough 8-).
One of the cores was marked with a code like 3C...something
that resembled a ferrite grade code, but I don't remember
exactly all the numbers.
Anyway, as Andy said, there is no substitute for trying...
73 and GL de
Claudio, IN3OTD
--
http://www.qsl.net/in3otd
The ferrite cores used in TV EHT line output transformers use
similar materials to the SMPSU transformers - they operate at a
lower frequency, so some might be more lossy, you will just have
to try. The type with a metal clip are handy to wind cables round for
RFI supression, but they are a slightly awkward shape for making a
transformer with. Make sure you remove any thin plastic film
spacers from the joining surfaces before using; the 'air gap' is good
for an energy storage inductor, but not a transformer.
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