inger K2AV [mailto:k2av@gmail.com]
Sent: Sunday, February 03, 2019 07:17 AM
To: MU 4CX250B
Cc: Jim Brown; Mike Waters; topband@contesting.com
Subject: Re: Topband: Updated K9YC common-mode choke PDF now available
I would not repeatedly bend any coax with a solid center conductor. Which
le
are vastly superior to RG58 and
its variants in almost any application.
73.
Jim W8ZR
From: Guy Olinger K2AV [mailto:k2av@gmail.com]
Sent: Sunday, February 03, 2019 07:17 AM
To: MU 4CX250B
Cc: Jim Brown; Mike Waters; topband@contesting.com
Subject: Re: Topband: Updated K9YC common-mode choke
I would not repeatedly bend any coax with a solid center conductor. Which
leaves RG142 for permanent routing. Jumpers to and from back of TXR and
amps etc are always RG400. Windings on cores are always RG400. RG400 shield
weave and center conductor made of very fine strands of silver coated
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
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.
Mike and Jim
Thanks for posting this good info..
Timely for me anyway.
Fred KB4QZH
Mike Waters wrote:
> -- Forwarded message -
> From: Jim Brown
> Date: Mon, Jan 21, 2019, 11:36 PM
> Subject: Re: Topband: Inverted L improvements - Part 3 (now with data)
> To: Mike Waters
-- Forwarded message -
From: Jim Brown
Date: Mon, Jan 21, 2019, 11:36 PM
Subject: Re: Topband: Inverted L improvements - Part 3 (now with data)
To: Mike Waters
After nearly a year of work, I published a new "cookbook" last month.
For reasons that are detailed in the accompanying
