[BC] Air-Dielectric Sections

[Gary Glaenzer]

oh, yeah

good point

G


----- Original Message ----- 
From: "Mike McCarthy" <Towers at mre.com>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Sent: Friday, March 09, 2007 7:30 PM
Subject: Re: [BC] Air-Dielectric Sections


> In today's age of absolute phase rotation presented to the transmitter
> being important for best broadband operation, treat the cable as you would
> in a DA and factor it in the design of the whole plant....DA or N-DA.
>
> MM
>
> At 08:14 AM 3/9/2007 -0600, Gary Glaenzer wrote
> >Andrew;
> >
> >If it's a non-DA, there will be no 'phasor' as such, just an ATU at the
> >antenna end.
> >
> >So 'velocity factor'  would not be a problem; even if it was different
from
> >3" to 4", which I'm not sure it would be.
> >
> >I'd bury it deeper than 3', unless you are in the South, and pulling 3"
> >Heliax thru 6" conduit over 750 feet will be a cast-iron SOB.
> >
> >The advice on fiber duct has been educational, and I'd look into it if I
> >were you.
> >
> >Gary
>
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