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From: dwl10@amdahl.UUCP (Dave Lowrey)
Newsgroups: net.audio,net.video
Subject: Re: Video connecting Cables
Message-ID: <897@amdahl.UUCP>
Date: Wed, 9-Jan-85 09:05:52 EST
Article-I.D.: amdahl.897
Posted: Wed Jan  9 09:05:52 1985
Date-Received: Sat, 12-Jan-85 06:35:40 EST
References: <117@lcuxc.UUCP> <1466@ritcv.UUCP>
Organization: Amdahl Corporation, Columbia MD
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Xref: watmath net.audio:3770 net.video:878

> I just had a surprising experience.  I bought a new TV, and saw that there was
> a slight duplicate shadow on each one of my local stations.  (My cable company
> foolishly retransmits all local VHF stations on the identical channel -- does
> ANYone else do that?)
> 
> I then replaced my rather nice-looking 75ohm cable (I got it with my VCR; it
> has quick-disconnect F-connectors) with another shoddy-looking one that my
> cable company had given me, and voila', the problem disappeared!!
> 

Definately, beware of any of the "flexible" 75 ohm cables that you
get with your vcr/disk. The shielding and the dielectric thickness are
marginal at best. I think every cable company that I have ever dealt
with has re-broadcast local channels on the same cable channel.
Shoddy cables will pick up both the cable-tv signal and the regular
broadcast signal, producing the above mentioned ghosts.
I also avoid quick-connect cables. Thew will inevitably work loose.
When the guy from the cable company installed my hookup, I asked him for
some extra cable and connectors. He left me 100 feet of cable and 16
F connectors (being a contractor, he didn't give a shit.). I then
made my own cables (at the exact required length). If worst comes to
worst, go to radio shack. But be carefull, there are two types of F
connectors, one for RG-59, and one for RG-56 (different dielectric
thickness).

The moral of the story is.....If you are having cable-tv interference
problems, suspect your cables!

-- 
-----------------------------------------------------------------------
                               Dave Lowrey

"GORT...Klatu borada niktow"

                                   ...!{nsc,sun,hplabs,ihnp4}!amdahl!dwl10

[ The opinions expressed  be those of the author and not necessarily
  those of his most eminent employer. ]