A short video about 405 line TV - UK Vintage Radio Repair and Restoration Discussion Forum

AC/HL · 15th Oct 2023, 12:59 pm

https://www.youtube.com/watch?v=ApqzTVuhFG8

Vintage Engr · 15th Oct 2023, 5:26 pm

Really interesting, my career in a nutshell! Thanks for the link.

It all seems such a long while ago now, when we thought the CRT would be with us forever...

David.

MeerKat · 18th Oct 2023, 9:16 pm

Well worth a watch, thanks for the link.

McMurdo · 19th Oct 2023, 2:13 pm

Mildly surprised when the narrator described the 405 line switch off as an 'untimely demise'. Surely a triumph of longevity.

linescan87 · 19th Oct 2023, 2:21 pm

I thought that too Kev, given the fact it was kept on so long after they had decided to go 625.

peter_scott · 22nd Oct 2023, 12:00 pm

It's a great pity that he chose to use the BBC's stupid and ignorant display of the supposed transmission systems of BTL and EMI in November 1936. The one on the left being 30 line instead of 240 line and the one on the right being something like a 100 line image instead of 405 lines.

Peter

PaulM · 22nd Oct 2023, 5:30 pm

Yes, an unfortunate juxtaposition of the <<wrong>> representative images!

Also, the company name is wrong. Formally, it was Marconi-EMI Television Ltd., not 'EMI Marconi'.
https://collection.sciencemuseumgrou...ompany-limited
Ignore the statement on the Science Museum website about largely being owned by RCA, it's bunk, although partially correct in that there was a large RCA share ownership of EMI, albeit not a controlling one. Marconi's was still fiercely independent!

Marconi's Wireless Telegraph Co. Ltd. not only had the wideband transmission and aerial technology, it had the legal rights to the RCA patents and tacit knowledge behind the EMI camera (including - controversially - interlace). EMI only had rights (via HMV) to television receiving patents. This area is very complex and little appreciated, so no wonder they don't explain! This all came about from the 1919 creation of RCA which essentially nationalised American Marconi with no agreement from the UK parent company. The 'deal' was rights to all RCA patents in perpetuity.

There's always things wrong with presentations like these, but it's quite watchable, even though there's a number of cringe moments!

Best regards,

Paul M

15th Oct 2023, 12:59 pm	#1
AC/HL Dekatron Join Date: Nov 2003 Location: Heckmondwike, West Yorkshire, UK. Posts: 9,632	A short video about 405 line TV https://www.youtube.com/watch?v=ApqzTVuhFG8 __________________ Bill, BVWS member

15th Oct 2023, 5:26 pm	#2
Vintage Engr Heptode Join Date: Jan 2008 Location: Shrewsbury, Shropshire, UK. Posts: 734	Re: A short video about 405 line TV Really interesting, my career in a nutshell! Thanks for the link. It all seems such a long while ago now, when we thought the CRT would be with us forever... David.

18th Oct 2023, 9:16 pm	#3
MeerKat Hexode Join Date: Jan 2016 Location: Ramsgate, Kent, UK. Posts: 293	Re: A short video about 405 line TV Well worth a watch, thanks for the link. __________________ Andrew Illegitimi non carborundum

19th Oct 2023, 2:13 pm	#4
McMurdo Dekatron Join Date: Jun 2009 Location: Staffordshire Moorlands, UK. Posts: 5,178	Re: A short video about 405 line TV Mildly surprised when the narrator described the 405 line switch off as an 'untimely demise'. Surely a triumph of longevity. __________________ Kevin

19th Oct 2023, 2:21 pm	#5
linescan87 Heptode Join Date: Mar 2014 Location: Meath, Ireland Posts: 539	Re: A short video about 405 line TV I thought that too Kev, given the fact it was kept on so long after they had decided to go 625. __________________ All the best, John Joe www.youtube.com/c/ojnojirishvintagetvandradio

22nd Oct 2023, 12:00 pm	#6
peter_scott Dekatron Join Date: May 2003 Location: Edinburgh, UK. Posts: 3,259	Re: A short video about 405 line TV It's a great pity that he chose to use the BBC's stupid and ignorant display of the supposed transmission systems of BTL and EMI in November 1936. The one on the left being 30 line instead of 240 line and the one on the right being something like a 100 line image instead of 405 lines. Peter Attached Thumbnails __________________ http://www.nostalgiatech.co.uk https://www.youtube.com/c/PeterScott/videos

22nd Oct 2023, 5:30 pm	#7
PaulM Hexode Join Date: Nov 2006 Location: Near Lincoln, UK. Posts: 465	Re: A short video about 405 line TV Yes, an unfortunate juxtaposition of the <<wrong>> representative images! Also, the company name is wrong. Formally, it was Marconi-EMI Television Ltd., not 'EMI Marconi'. https://collection.sciencemuseumgrou...ompany-limited Ignore the statement on the Science Museum website about largely being owned by RCA, it's bunk, although partially correct in that there was a large RCA share ownership of EMI, albeit not a controlling one. Marconi's was still fiercely independent! Marconi's Wireless Telegraph Co. Ltd. not only had the wideband transmission and aerial technology, it had the legal rights to the RCA patents and tacit knowledge behind the EMI camera (including - controversially - interlace). EMI only had rights (via HMV) to television receiving patents. This area is very complex and little appreciated, so no wonder they don't explain! This all came about from the 1919 creation of RCA which essentially nationalised American Marconi with no agreement from the UK parent company. The 'deal' was rights to all RCA patents in perpetuity. There's always things wrong with presentations like these, but it's quite watchable, even though there's a number of cringe moments! Best regards, Paul M Last edited by PaulM; 22nd Oct 2023 at 5:36 pm.