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Re: [TenTec] 95% Shield

To: tentec@contesting.com
Subject: Re: [TenTec] 95% Shield
From: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Reply-to: geraldj@storm.weather.net, Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 15 May 2008 22:06:09 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
On Thu, 2008-05-15 at 18:10 -0400, Ron Notarius W3WN wrote:
> Boy... there are a lot of unknowns and variables there.
> 
> First, be proactive.  Make sure you have a low-pass filter on your rig, your
> coax is intact, and connectors are tight.
> 
> Next, if you're allowed, carefully examine the neighbor(s) TV(s) in
> question.  What type of coax are they using?  How is their cable system
> wired up?  Did anyone hack into a cable to add a splice?  Do they have a set
> of "rabbit ears" anywhere?  (I've seen people leave their rabbit ears on, or
> their whip antennas on the TV attached, thinking it would "improve"
> reception; I know, but sometimes, you just can't convince 'em)  Is the TV
> case plastic (probable)?  How about their converter box?

And while you check out their TV, notice the jumps, shakes, bars and
other interference that are present while you for sure aren't
transmitting because you are at their TV.
> 
> Do you have a friend with an HF mobile setup?  If so, ask them to sit in
> your driveway and make some test transmissions on various HF bands.  If your
> neighbors still have RFI, that's a clear indication that the problem may NOT
> in your rig, but in their sets; OTOH, if there is no RFI, that's a clear
> indication that the problem may NOT be in their sets, but in your rig.
> 
> It's not a question of power; it's a question of how the RF is getting into
> their set.  If (unlikely) your rig is malfunctioning and putting out spurs
> where it shouldn't, then your rig needs repaired.  But if (much more likely)
> there's a leak or break in their cable system, which is letting RF into the
> allegedly (hah!) "closed" system, the break has to be fixed.
> 
> Been there, done that.
> 
> GL.
> 
> 73, ron w3wn
> 
73, Jerry, K0CQ

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