[time-nuts] T'bolt antenna lead-in running near HF RF transmitting coax
J. Forster
jfor at quikus.com
Fri Jan 20 19:27:22 UTC 2012
I thought of that, but I know where Jim lives and copper pipes stiking
through a wall would gather condensation and ice on the inside because
it'd conduct the sub-freezing temps inside and maske a real mess. The
situation would be reversed in summer.
He could use PVC pipe wrapped with a layer of adhesive copper foil with
the seams soldered.
-John
============
> In the past when I had that problem I used copper pipes as feed through
> the
> wall and bend the pipes with a pipe bender one on each side. Never had a
> problem, do not know if I would have other wise.
> Bert Kehren
>
>
> In a message dated 1/20/2012 1:46:32 P.M. Eastern Standard Time,
> mspencer12345 at yahoo.ca writes:
>
> I've run my GPS antenna lead along with coax carrying 100 Watts on HF and
> 50 watts on VHF / UHF with no known issues.
>
> I do have ferrite chokes on all my feed lines.
>
> I also use the Symmetrciom 53532 antenna.
>
> --- On Fri, 1/20/12, James Robbins <jsrobbins at earthlink.net> wrote:
>
>> From: James Robbins <jsrobbins at earthlink.net>
>> Subject: [time-nuts] T'bolt antenna lead-in running near HF RF
> transmitting coax
>> To: time-nuts at febo.com
>> Received: Friday, January 20, 2012, 1:41 PM
>> Can I run the coax feed-in from a
>> Symmetricom 58532A GPS antenna (feeding my T'Bolt) adjacent
>> to coax which is carrying HF RF of 500 watts? I have a
>> 1.5" hole through an outside wall in my house through
>> which my HF ham antenna coax passes (LMR400 coax). Can
>> I safely run the GPS antenna coax through the same hole
>> which would put the coax parallel with and touching the
>> other coax for about 8 inches. If not, how much
>> separation would be advisable? Many thanks. Jim
>> Robbins N1JR
>>
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