🚀 go-pugleaf

"Bruce Esquibel" <bje@e4500.ripco.com> wrote in message 
news:g412c3$hcq$1@e250.ripco.com...
> Ian S. Salisbury <isalisb@nospam.gmail.com> wrote:
>
>> And my question from guess #2, is really; could you actually broadcast
>> an analog TV signal from NY to LA with enough juice?  We know that audio
>> can in the AM band, but what about Video in the UHF?
>
>
> If the earth was flat, no problem.
>
> Being it's not, the only way to get from NY to LA would be if the
> atmospheric conditions were right and it bounced up and down to get there.
>
> There are actually a few "world records" for long distance tv veiwing, I'm
> probably mistaken but top honors I beleive was some guy in New Zealand
> picked up some kind of watchable signal from Michigan. Or maybe it was
> Michigan from Chile. I don't run across those much anymore, probably due 
> to
> cable and people not "spinning the dial" anymore.
>
> But the point is, that was all due to weather conditions.
>
> If the curvature of the earth wasn't involved, enough power could get a
> signal from anywhere to anywhere.
>
> -bruce
> bje@ripco.com

Good reply, Bruce.

When I was up north, there were frequent ducts to Ohio and Southern Indiana. 
I could often watch TV out of those areas.

I think that *theoretically*, one could  broadcast from New York to 
California.

If you knew (1) How microvolts you needed at a given spot in California at 
the elevation that you want to recieve (2) How many db of loss you're going 
to encounter at the particular frequency and (3) Height of your transmitting 
antenna, you can figure out how much power you'll need to get a usable 
signal there.

Take into account that @ 150 mhz, RF horizon is 4/3 of actual horizon.

Actual horizon at sea, IIRC, is 14 miles.

At marine freq's, 162 mhz, ships have no problem communicating simplex much 
farther than actual horizon.

That's why we can hear low power airplane transmissions from a *long* way 
away.

Problem being, we'd have this *huge* directional antenna on top of the 
Empire State Building, pumping 2 1/2 million kw into it with enough ERP 
emitted to fry New York, and insure that there wouldn't be another baby made 
until you get on the west end of Oklahoma.

I'm not doing anything this weekend, Bruce, shall we try it?

We'll build a yagi out of 12" reinforced pipe, piggyback some miltary grade 
linear amps, and set off every burglar alarm, garage door opener, and fry 
every pacemaker through central U.S. and southern Canada.

In reality, I welcome the switch from Never The Same Color to Always The 
Same Color, but it is giving me some fits out here in Green Acres.

Ever tune the old analog cell phones on that tubed 19" in the garage?