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Re: [TowerTalk] Ferrite choke thermal situation

Subject: Re: [TowerTalk] Ferrite choke thermal situation
From: Jim Brown <>
Date: Sat, 14 Apr 2012 21:56:25 -0700
List-post: <">>
On 4/14/2012 6:18 PM, Dan Hearn wrote:
> Re the Balun Designs chokes I am only concerned with the coax jobs. They
> seem to use the W1JR design on the 2.4 cores with the crossover for half of
> the turns.

The most important characteristic of the W1JR design is his choice of 
#61 material, which makes it a very poor choke,  No one has been able to 
observe any measurable effect of the crossover winding.

If the choke in question is effective in the HF bands, it is not #61 

73, Jim K9YC

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