[78-L] end of 525-line television ^

[simmonssomer]

Yup. I saw those sets at the 1939 Worlds Fair. The tube was mounted 
vertcally and the lid was a mirror that opened ,perhaps, 60 or 70 degrees so 
that you actually watched a reflection of the tube's image in it.


Al S.

----- Original Message ----- 
From: "Michael Biel" <mbiel at mbiel.com>
To: "78-L Mail List" <78-l at klickitat.78online.com>
Sent: Wednesday, January 07, 2009 6:28 PM
Subject: Re: [78-L] end of 525-line television ^


>
>
> -------- Original Message --------
> Subject: Re: [78-L] end of 525-line television ^
> From: Bertrand CHAUMELLE <chaumelle at orange.fr>
> Date: Wed, January 07, 2009 3:28 pm
> To: 78-L Mail List <78-l at klickitat.78online.com>
>
>> I'm no expert, but I would say that:
> -there was no standard in 1939. NTSC *recommended* 525-line to FCC in
> March 1941. FCC announced that standard in May 1941 (black and white,
> with FM sound).
>
>
> I'm far away from my reference books, but yes, the 1939 Worlds Fair
> broadcasts were in the 440 line system under the FCC's "experimental"
> mode.  The commercial standard of 525 lines came in on the same day
> commercial TV broadcasting was authorized, the call letters changed, and
> that first B-U-L-0-V-A commercial was aired, July 1, 1941.
>
>
>> But then there was the was the FCC freeze from Feb. 1942 to Oct.
> '44.regarding transmitters and TV-sets.
>
> Stations could stay on the air -- and schedules became comparatively
> short --  but it became tougher to keep transmitters and receivers
> operating as the war continued.
>
>
>> In May 1944, James L. Fly (FCC) agreed with CBS: "If we begin to make
> 525-line equipment now, we'll never upgrade to a higher definition".
> Almost all of the sets in use then were 440-line.
>
>
> Not true.  They were very easily convertible to 525, and RCA had their
> repair crews go to all the homes and convert the sets in time for the
> July 1941 changeover.  In 1939 thru 41 RCA knew where every one of their
> sets were, and each week every owner got a business reply card with the
> program schedule asking them to check off what they watched and how they
> liked it.  It was joked that their ratings used a 100% sample.
>
>
>> CBS was working hard
> on a color system, they said they were ready but wanted to use UHF
> instead of VHF and a 735-line definition.
> The first post-war TV-sets were sold to the public beginning Nov. 3,
> 1946.
>
> -As for mechanical television, the CBS color system which went
> commercial from June 25, 1951 to Oct. 20, 1951, WAS mechanical, at
> least on the receiving side.
>
> BC
>
> Also at the camera end.  Some of the early experimental programs got
> good reviews.  The Early TV Museum outside of Columbus Ohio has several
> mechanical color sets working and they look pretty good.  THere are
> electronic converters to turn the NTSC signal into the CBS color system.
> They also have several 1953 and 54 RCA and RCA-Type sets operating that
> can feed off of the same source.  Usually they show color bars, the
> original CBS color test pattern, and The Wizard of Oz.  They also have
> mechanical TVs from the 1920s and 30s in operation.  They have an annual
> convention each spring.
>
> As for Vince's question, I have no news of any plans for special
> progrms.  I recorded Channel 5 New York's special program surrounding
> the test in November when they dropped NTSC for two minutes on all the
> stations.  NTSC is not ending entirely like when France dropped 819 and
> the UK dropped 405.  The rest of the hemishpere is still using NTSC and
> perhaps only Canada is in a financial condition to even consider a
> changeover.  I think there are going to be BIG problems when the change
> comes.  I'm testing my Digital TV down in Birmingham and find it hard to
> maintain a digital signal, and when I was in Brooklyn it was hard to get
> all the stations at all.  In Kentucky I'm om range of only one station,
> our local PBS.  What fringe I can get will be GONE!!!!!
>
> Mike Biel  mbiel at mbiel.com
>
>>
>>
>> Fitzpatrick Vincent wrote:
>>>
>>>
>>> This question is especially for Dr. Biel, Elizabeth, and other
>>> broadcasting
>>> experts:
>>>
>>> Is any special programming planned by the old networks marking the
>>> end of 70
>>> years of 525-line broadcasting. I know, or think I know, that this
>>> was the
>>> standard by the time of the New York World's Fair. Was there any
>>> other
>>> standard for electronic scanning in "wide" use between the definitive
>>> death
>>> of mechanical scanning and 1939?
>>>
>
>
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