MULLARD LSD-2 and LSD-3 tubes/stroboscopes - UK Vintage Radio Repair and Restoration Discussion Forum

brenellic2000 · 19th May 2011, 2:31 pm

OK, I know these are electronic cathode discharge tubes used in early electronic flash guns but does any ex-Mullard chap (or chapess!) know the history and development of these?

The reason I ask is these were used in Britain's first electric photographic flash-guns, the Mega-Flash, from 1947 (the LSD-3 from 1949) but were these LSDs used in similar high-speed stroboscopic work during the war or pre-war? As I understand it stroboscobes were first developed in American in the 1930s, but were they also developed in the UK in the 1930s/40s and is this the origin of the LSD tube?

Barry

davegsm82 · 19th May 2011, 10:54 pm

http://www.datasheet4u.net/download.php?id=626423

That link is to the datasheet for the LSD-2 tube, gives a little snippet of information in there.

Dave.

brenellic2000 · 20th May 2011, 1:22 pm

Thanks - I've already got that! Its the development and application I am interested in.
Barry

woodchips · 24th May 2011, 9:04 pm

Hi, got a photo? Always makes it easier when youcan see what the questions are all about. Bob

19th May 2011, 2:31 pm	#1
brenellic2000 Octode Join Date: Aug 2006 Location: Rye, East Sussex, UK. Posts: 1,647	MULLARD LSD-2 and LSD-3 tubes/stroboscopes OK, I know these are electronic cathode discharge tubes used in early electronic flash guns but does any ex-Mullard chap (or chapess!) know the history and development of these? The reason I ask is these were used in Britain's first electric photographic flash-guns, the Mega-Flash, from 1947 (the LSD-3 from 1949) but were these LSDs used in similar high-speed stroboscopic work during the war or pre-war? As I understand it stroboscobes were first developed in American in the 1930s, but were they also developed in the UK in the 1930s/40s and is this the origin of the LSD tube? Barry

19th May 2011, 10:54 pm	#2
davegsm82 Heptode Join Date: Jan 2004 Location: Blyth, Northumberland, UK. Posts: 858	Re: MULLARD LSD-2 and LSD-3 tubes/stroboscopes http://www.datasheet4u.net/download.php?id=626423 That link is to the datasheet for the LSD-2 tube, gives a little snippet of information in there. Dave.

20th May 2011, 1:22 pm	#3
brenellic2000 Octode Join Date: Aug 2006 Location: Rye, East Sussex, UK. Posts: 1,647	Re: MULLARD LSD-2 and LSD-3 tubes/stroboscopes Thanks - I've already got that! Its the development and application I am interested in. Barry

24th May 2011, 9:04 pm	#4
woodchips Octode Join Date: May 2010 Location: Grantham, Lincolnshire, UK. Posts: 1,175	Re: MULLARD LSD-2 and LSD-3 tubes/stroboscopes Hi, got a photo? Always makes it easier when youcan see what the questions are all about. Bob