[TVI-RFI-EMI] I need help here

Sun, 20 Jan 2002 12:35:44 +0000

I would lower the inverted vee temporarily, to see if the
swr/tvi problems are improved. It might be better
if you load the tower with a gamma match for 80.

Dave Hachadorian, K6LL
Yuma, AZ
[email protected]

On Sat, 19 Jan 2002 11:41:32 -0600 "FireBrick" <[email protected]>
writes:
> A little preliminary info.
> I live in an urban small lot area. Most have cable TV.
> Previous to a sudden onset of tvi, I had no problems.
> About a month ago, I suddenly started experiencing SEVERE tvi in my 
> home.
> On 40, 30, 20, and 17.
> 15, 12, 10 seemed clear.
> 
> I've checked all my ground connections and find them all solid.
> I've checked all my cable connections and can find nothing wrong.
> 
> My antennas consist of a Sommer yagi on a crankup, normally about 55 
> feet.
> Just below, about 10 feet hangs the center of a 80 meter inverted 
> vee.
> 
> Cool but no wind so I lowered antenna to check for something wrong 
> there.
> Nada.
> 
> Could find no loose connections, everything look perfect.
> 
> Now here is something I did find.
> On 20 meters, pointed due west, swr about 1.7 which drops to nothing 
> as the
> antenna turns to east. As does the tvi.
> Beaming west, high TV wipeout.
> Beaming east, barely perceptible tvi.
> The odd part is that when beaming to the East, I'm beaming directly 
> down the
> ridgeline of my roof and that's when the tvi is the least.
> You would think if it's overload, harmonics, ac infiltration, it 
> would be
> the opposite.
> 
> Now my 80 meter dipole does run east and west.
> As does my com ed, telephone, and cable lines to the alley where all 
> lines
> are connected and then run north and south.
> 
> 
> As this problem appeared basically overnight I have to assume that 
> something
> broke.
> But I'm just about out of ideas. I've been a ham a while and have 
> read just
> about everything about tvi over the years.
> 
> I sure need someone with a miracle answer here as I'm pretty much 
> off the
> air till I fix this.
> 
> and no....I have NOT checked with my neighbors....I think that would 
> be a
> bad idea. :-))
> But, I haven't had anyone complain either.
> 
> 
> 
> 
> 
> ------------------------------------------------------------
> If God had intended man to smoke, He would have set him on fire.
> ------------------------------------------------------------
> 
> Bill H. in Chicagoland
> [email protected]
> 
> 
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