K2 - T3 FT50-43

[Bob Mallory]

Just getting to the Toroid Building section of the base K2.  I've noticed that I don't have a FT50-43 (.5" gray Ferrite Core), but I have two of the T50-6's, the Yellow Iron-powder core.  

Does anyone know or have tried the Yellow Iron-powder core for the T3 winding?  Or should I contact Elecraft to get the correct one?

Thanks...
Bob K8TOB

[Don Wilhelm-4]

Bob,

Don't even think about using that yellow core at T3 - that core must
have a high permeability (as do all the other transformers except T5).  
T5 is really a tapped inductor rather than a true transformer.

email [hidden email] and ask for the correct core.

73,
Don W3FPR

On 2/21/2012 10:09 AM, Bob Mallory wrote:

> Just getting to the Toroid Building section of the base K2.  I've noticed
> that I don't have a FT50-43 (.5" gray Ferrite Core), but I have two of the
> T50-6's, the Yellow Iron-powder core.
>
> Does anyone know or have tried the Yellow Iron-powder core for the T3
> winding?  Or should I contact Elecraft to get the correct one?
>
> Thanks...
> Bob K8TOB
>

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