[TowerTalk] CM choke using Fair-Rite 52 mix

[Steve Hunt]

Bob,

Fair-Rite refer to it as a "new" material in the September 2009 copy of 
their catalogue. In terms of Initial Permeability it sits between 
#31/#43 and #61. I believe it may have been a replacement for their old 
Type K material.

It doesn't have sufficient permeability for the bottom end of the HF 
range, but looks very useful for 30m thru 10m operation. For example, I 
measure Rs>12kOhms at 14MHz for 17 turns of RG58/RG400 on a single 
FT240-52; that would be ideal for 20m monoband applications.

73,
Steve G3TXQ


On 03/05/2012 16:08, Bob K6UJ wrote:
> Looks pretty good.  Is this a new Fair-Rite mix ?
> I wonder how it compares to their #31 and #43.
>
>
> Bob
> K6UJ
>