[Amps] 160M PI network Toroidal Coil

[Manfred Mornhinweg]

Paul,

> I'm going to convert a SB221 to a single band 160M amp. It seems most 
> of the amps these days use a toroidal coil for the 160M Output PI 
> network. Does anybody know what cores are typically used for the 160M toroid?

A large toroid made from type 2 powdered iron material, which has a 
permeability of 8 and is coded red, should be fine.

Manfred

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