Re: It had to happen

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From: charles copeland (charles1@netcom.com)
Date: Sun Dec 31 1995 - 11:55:48 EST


> Well...After two years in this apartment complex (and only a bit longer
> as a ham), I have received my first TVI complaint....and I was at
> qrp (ish) levels (ssb at less than 10 watts...need to calibrate the
> meter). 15m is the big problem...the only other thing that causes
> problems is 40, and I keep that below 5w which alleviates that
> problem.
>
> I guess it's time to gather up the interference pamphlets and offer
> to help solve the filtering probs...but this is not going to be fun...
> this lady hates us. OUr fault I spose...They are in the apartment
> below us so whenever our three year old is on the balcony and manages to
> knock over a plant or something, the spillover hits their patio. (She
> isn't actually allowed out there anymore, of course, but the lady
> downstairs has a long memory...the glass of water brittany spilled
> on her patio (bare concrete mind you...within a couple hours of it
> raining anyway) seems to have ticked her off)...ah well this should
> be fun...anyone have any particular recommendations for approaching
> the tvi problem?

I've got the same problem living in an apartment and attempting to
run a TS-820. I have a 64 foot folded dipole running along wall/roof
almost circling L shaped living/dining rooms.

I can get away with 10w on 40m CW. 5w pm 80m CW. 2w on 15m CW. And
forget about voice on 10m. (I'm tech+)

I've been looking into how to reduce TVI. Here are some fixes:

My TS820 rates harmonics reduced 40db, but books say for TVI it should
be more like 80db. Gonna get a low pass filter rated at least at 40db.

RF getting back into the AC line can be fixed with a AC filter.
I've got a "transient voltage protector" power strip made for my
computer. It also happens to filter 10mhz to 30db down.

I think a 1:1 balun will help keep RF off chassis and outside of coax,
but not sure ... got one anyway.

Gonna try to get a good ground, but have yet to get up courage
to beat a rod in the ground on apartment grounds.

Any other suggestions?


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