Topband: Termination Transformer

[Jim Brown]

On Fri,1/1/2016 5:01 PM, n0tt1 at juno.com wrote:
> Your winding is shorted to the core and there
> could be even a shorted turn.

Yes, BUT -- the conductivity of ferrite cores varies a LOT from one mix 
to another. Some materials are excellent insulators (#61, #44), some are 
pretty good conductors (77, 78, 73, 75). Some are such good insulators 
that bare wires are used to wind coils through them. #31 is sort of in 
the middle -- VOM probes between parts of a #31 core will read in the 
high tens of KOhms.

Pages 4, 5, and 6 the link below show fundamental properties (including 
Resistivity) for each material, one vertical column per material.

http://www.fair-rite.com/newfair/pdf/Fair-Rite_Catalog_17th_Edition.pdf

73, Jim K9YC