Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Television Broadcast Theory

Notices

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 08-22-2012, 02:57 AM
cbenham's Avatar
cbenham cbenham is offline
VideoKarma Member
 
Join Date: May 2006
Posts: 471
Quote:
Originally Posted by Jeffhs View Post
The short answer to this question, without going into a lot of history and details, is that the frequencies once known as television channel one in the U. S. were reassigned by the FCC in the late 1940s-early fifties, but not necessarily to land-mobile radio services. These frequencies, again without going into details, eventually were reassigned to the Amateur Radio Service as the six-meter amateur band.
Oh, c'mon, lets get into some very interesting details about Channel One.

Channel 1 was allocated at 44-50 MHz between 1937 and 1940. Visual and aural carrier frequencies within the channel fluctuated with changes in overall TV broadcast standards prior to the establishment of permanent standards by the National Television Systems Committee.

In 1940, the FCC reassigned 44–50 MHz to the FM broadcast band. Television's channel 1 frequency range was moved to 50–56 MHz (see table below). Experimental television stations in New York, Chicago, and Los Angeles were affected.[1]

Commercial TV allocations were made by the Federal Communications Commission (FCC) under the NTSC system on July 1, 1941. Channel 1 was located at 50-56 MHz, with visual carrier at 51.25 MHz and aural carrier at 55.75 MHz. At the same time, the spectrum from 42 to 50 MHz was allocated to FM radio. Several commercial and experimental television stations operated on the 50-56 MHz Channel 1 between 1941 and 1946, including one station, WNBT in New York, which had a full commercial operating license.

In the first postwar allocation in the spring of 1946, Channel 1 was moved back to 44–50 MHz, with visual at 45.25 MHz and aural at 49.75 MHz. FM was moved to its current 88-108 MHz band. But WNBT and all other existing stations were moved to other channels, because the final Channel 1 was reserved for low power community stations covering a limited area. While a handful of construction permits were issued for this final version of Channel 1, no station ever actually broadcast on it before it was removed from use in 1948.

There's MUCH more about channel one where this came from:
http://en.wikipedia.org/wiki/Channel...American_TV%29

Read it all and you'll understand!

Cliff
Reply With Quote
  #2  
Old 08-23-2012, 05:57 PM
W3XWT W3XWT is offline
3 Phase 480VAC is QRP
 
Join Date: Feb 2010
Location: California
Posts: 213
Wikipedia

Cliff, my good friend,

I found some possible errors with the Wikipedia article on channel 1... or, "Channel One" as WNBT always called it, IIRC.

If W9XZV was the first "all-electric TV station", were the others steam powered? Perhaps using disused locomotives as a joke promo I saw years ago out of the U.K.?

Also, K2XBS was really KS2XBS and KS2XBR, the latter of which was still on-air into the 1970's on channel 38 testing systems later used in Zenith's OTA and cable scrambling systems. I'm sure our friend Wayne ("the flicker kicker") can provide more info on those stations.

Ahhh Zenith... where the parts went in before the name went on!
__________________
Reception Reports for Channel 37 TVDX Can Not Only Get You a QSL Card, but a One-Way Trip to the Planet Davanna is a Real Possibility...
Reply With Quote
  #3  
Old 08-25-2012, 02:07 AM
cbenham's Avatar
cbenham cbenham is offline
VideoKarma Member
 
Join Date: May 2006
Posts: 471
Quote:
Originally Posted by W3XWT View Post
If W9XZV was the first "all-electric TV station", were the others steam powered? Perhaps using disused locomotives as a joke promo I saw years ago out of the U.K.?
Once in a TV studio being readied for a show with a very famous TV star, the
director wandered in and asked an engineer if he could straighten up all the camera and mic cables. He wanted it to look nice that day.

The engineer, a good friend of mine who was deep into a broken camera that was needed in less than an hour turned and said, "Be glad were not doing all this with steam!"

Cliff
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:37 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.