[RFI] Choke questions

[Jim Brown]

On 1/21/2020 9:32 AM, EDWARDS, EDDIE J via RFI wrote:
> Use coaxial cable when making RF chokes for antenna systems.

Parallel wires work fine for winding chokes. There's no need for 
shielding -- the field from the choke is confined to the core.

At least half of the chokes in my station are wound with a pair of 
Teflon insulated #12 stranded silver-coated copper wire. The rest are 
wound with RG400. The Cookbook includes data for #12 THHN as a lower 
cost alternative.

http://k9yc.com/2018Cookbook.pdf

73, Jim K9YC