Re: [IRCA] AC twin lead or speaker wire for lead in.

["Chuck Hutton" <charlesh3@xxxxxxx>]

I'm not sure what " directivity of the unwanted signals on the
coax for the most part are a non issue" means. Antennas have directivity,
but signals????

In a well-built system, disconnecting the coax from the matching transformer
ought to leave you with no pickup. "well built" means using coax that
totally shields the conductor, grounding the shield well, and keeping pickup
on the shield from getting to the radio by using "choke baluns".

The easiest part to improve may be the coax: Radio Shack sells about the
poorest grade of coax made with respect to shield coverage, or used to. I
don't see that spec on their web site now.

Chuck

-----Original Message-----
From: irca-bounces@xxxxxxxxxxxxxxxx [mailto:irca-bounces@xxxxxxxxxxxxxxxx]
On Behalf Of Patrick Martin
Sent: Friday, August 17, 2007 5:38 PM
To: Mailing list for the International Radio Club ofAmerica
Subject: Re: [IRCA] AC twin lead or speaker wire for lead in.

Craig,

I was once told that when you hook up the coax to the receiver and the
matching transformer, the directivity of the unwanted signals on the
coax for the most part are a non issue. Once you disconnect the coax
from the matching transformer or even terminate it, the pick up will be
heard. Of course going to double/triple  shield or maybe bigger stuff
(RG213), hardline may solve the issue too. 

73,

Patrick

Patrick Martin
KAVT Reception Manager

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