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Hi All
Another anomaly about these ferrite transformers. I
wound a 3c type core with a Sec of 24 turns and measured it to be 1.38
mh then over wound this with the prim of 8 turns, this reduced the Sec to 982 uh
with a prim of 110 uh. The ratio is about right x9 for a 1:3 ratio. I suppose
meaurements should only be made when the transformer is complete with all
windings, but it does show the effects of multiple windings over a single layer.
Except one has a lot of test equipment it seems
most dabblers are working in the dark especially at LF, no wonder there are so
many BANGS especially the FETS!!!!!!!1
To guarantee a robust no bang amplifier maybe TUBES
are still the best bet.
From messages received it appears to be that as
long as the ratio Prim /Sec is correct the ferrite material is not important but
then why such a variety of different core material, although I do realise that
certain other ccts at HF work better with a particular core mix.
I could do with some design literature written by
others that have experience in the ferrite transformer research
field.
73 de Mal/G3KEV
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