Topband: Topband]Updated K9YC common-mode choke PDF now available

[john at kk9a.com]

I have been using RG400 to make jumpers for years. It is a nice easy to
work with coax that has excellent shielding. RG400 is available surplus
for much less than $5/ft.

John KK9A

W8ZR wrote:

Very interesting, Jim. I wasn't familiar with RG-400, but I've used
RG-142B for years. I compared the specs and found they're virtually
identical, the only significant difference being that RG-400 has a
stranded center conductor, while RG-142B has a solid steel
(silver-plated) center conductor. They both have a 1 inch minimum
bending radius (for repeated bending), but I imagine the RG-400 Is
slightly more flexible and the RG142B is slightly stronger. At GHz
frequencies, the RG142B has slightly lower loss. They both have
excellent high temperature properties. If you buy it new from a
distributor, either will cost about $5 a foot.
73,
Jim w8zr