[RFI] Common Mode In-Shack Choke

[Jim Brown]

On 4/7/2021 3:01 PM, David Eckhardt wrote:
> I have used RG-142 for the purpose.  It is high-power Teflon center
> insulated with double shield.  All conductors are silver plated.  It will
> take a kW at HF.

The shortcoming of all of these coaxes in this application is bend 
radius, which when wound on 2.4-in o.d. toroids is significantly less 
than they are specified. With a lot of consultation with other engineers 
whose judgement I trust, I settled on RG400, because the center is 
stranded silver on copper, making it less likely to migrate with the 
tight wind.

73, Jim K9YC