View Single Post
Old 24th Nov 2020, 2:53 pm   #19
Panrock
Nonode
 
Panrock's Avatar
 
Join Date: Feb 2005
Location: Worcestershire, UK.
Posts: 2,532
Default Re: 3” screen 405 line portable Tv

Quote:
Originally Posted by rambo1152 View Post

Both in System I, VHF
Both unlatched System A, UHF

Two nice undocumented features!
A story I've told before. At Network Control 2 (for BBC2) at Television Centre, where all the various sources were linked into one service, we used a Sony 9-90 for our off-air monitor. It showed the output from Crystal Palace Ch.33.

At the time I had noticed the feature Rambo mentions. (Actually I think you'll find it works the other way round.) During one idle moment during a Trade Test Transmission I wondered if the complete 625-line UHF chain would handle a 405-line signal. So I pushed both buttons in on the Sony, which now was primed to display a 405-line picture on UHF, and went back to the Mixer Desk, where I selected 405-line Test Card D as a source. Then I 'punched it up' through the mixer.

It all worked perfectly! 405 on Ch 33 UHF from CP (and all the other national transmitters). I only risked leaving it for a couple of seconds though, otherwise alarm calls would have started coming in. Possibly also 'calls' on my job!

Steve
__________________
https://www.radiocraft.co.uk
Panrock is offline