[Tig] DTV assignments antenna work may be good business

[Rob Lingelbach]

On Feb 12, 2008, at 12:01 AM, DCFWTX at aol.com wrote:
>
> distant station can totally take out a local channel 2, as is the case
> regularly in Houston. Even one time here in the San Fernando Valley
> of Los Angeles, KPRC completely took out KNXT channel 2 to a point
> that they had to tell their Los Angeles viewers what the problem was,
> one afternoon in the 80's! So it appears that low band VHF will not
> support any DTV, in my opinion.

At one point I lived in a box canyon just east of the Hollywood
Reservoir, facing south. Mt. Wilson was impossible, but San Diego TV
was fairly receivable; I didn't mind an analog signal that wasn't
fully quieting the snow. I believe though that with ASTC the San Diego
signals wouldn't make it over the digital cliff. BTW I think another
term for what you're describing David is tropospheric ducting; ducting
events as you know occur when there's an inversion layer - warm air
below cool - that often happens in L.A. But there's also troposcatter.
Add meteor scatter, moonbounce, knife-edging, long-path and E skip,
and it's a paradise for RF freaks. (digression complete)

will we one day bemoan the loss of analog TV transmission? I suppose
there's always ATV (Amateur TV: fast-scan) and SSTV (Slow Scan Amateur
TV). In 1986 it was fun to cover The Angeles Crest 100 race with ATV
and packet radio (with a Heath/Zenith laptop running Unix).

(motto for NAB 2009: "Into the Future with Digalog, the Best of  
Yesterday and Tomorrow!!")



-- Rob Lingelbach rob at colorist.org
http://www.colorist.org