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   From: peterw_no-spam_@freenet.co.uk   
      
   "Andrew Morrison"  wrote in   
   news:befekv$1c6$1@hercules.btinternet.com:   
      
   >   
   > "Stephen Neal"  wrote in message   
   > news:befebk$8gl$1$830fa7b3@news.demon.co.uk...   
   >> Andrew Morrison wrote:   
   >> [snip]   
   >> > So, if the french secam system had 819 lines over the UK's 405 - over   
   >> > double - then wouldn't have the quality been great ?   
   >>   
   >> This wasn't SECAM - AIUI SECAM was/is the line sequential FM based   
   >> subcarrier colour system. (Sequential Couleur Avec Memoire - Sequential   
   >> colour with memory)   
   >>   
   >> I expect the 819 system could have been good in picture quality terms   
   > live -   
   >> it had a wide vision bandwith? - but I suspect any Quad VTR designed to   
   >> operate on it must have softened it a bit?   
   >>   
   >> Steve   
   >>   
   >>   
   >   
   > Of course SECAM wasn't in use then - your right.  SECAM was developed for   
   > colour.  D'oh !   
   >   
   >   
      
   I remember seeing 819 back in the '70s in France. It was a very fine   
   quality picture but I think rather prone to interference as everything   
   (sound & vision) was AM (perhaps even double-sideband I think!) and IIRC it   
   was positive modulation like 405-line in the UK, so car-ignition   
   interference was white spots unlike System-I 625 where the vision   
   modulation is negative (black interference) with FM sound.   
      
   The TV had a big changeover switch for 625, like the dual-standard 625/405   
   Bush sets in Ireland in the 60's.   
      
   Peter   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)