Baird T5 garage find - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

Studio263 · 4th Jul 2018, 4:49 pm

Quote:

Originally Posted by FERNSEH

I believe development of the T5 started in sometime in 1935, possibly some input from Fernseh AG.

So why bother with the 240 line option (as fitted to early HMV 900s etc) if Baird already had 405 line sets in development as early as 1935?

FERNSEH · 4th Jul 2018, 5:16 pm

The characteristics of both systems was announced to the industry in 1935 and manufactures had to get on with it and design timebases that work on both standards. Obviously, Baird Television Limited were hoping the BBC would adopt their 240lines 25fps standard instead of the superior 405 line system. That didn't happen of course because of all the problems they had with the 240 line system.

I've never seen a Baird T5 with the standards switch but I notice the timebase chassis in my T23 has had provision for the extra controls.

DFWB.

peter_scott · 4th Jul 2018, 5:24 pm

There wasn't a problem making receivers. I think Baird got Bush to make the T5. The problem for Baird was that he had no viable camera and mechanical scanning used in the intermediate film process and the spotlight studio was struggling even with 240 lines. He also had the Farnsworth electronic camera but it had poor sensitivity and image distortion problems.

Peter

Heatercathodeshort · 4th Jul 2018, 8:14 pm

The 'Baird' T5 was built by Bush Radio in it's entirety. It is listed as the Baird/Bush T5 in some 1936 books. John.

FERNSEH · 4th Jul 2018, 8:54 pm

Weren't the Baird Cathodevisor cathode ray tubes made at the Crystal Palace works? J.L.Baird experimented with the production of large CRTs.

DFWB.

ianm · 4th Jul 2018, 11:16 pm

Quote:

Originally Posted by peter_scott

the owner claimed copyright so I didn't use them.

Isn't the individual in question no longer with us? That might sound a little 'enigmatic', so to speak.

4th Jul 2018, 5:16 pm	#22
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: Baird T5 garage find The characteristics of both systems was announced to the industry in 1935 and manufactures had to get on with it and design timebases that work on both standards. Obviously, Baird Television Limited were hoping the BBC would adopt their 240lines 25fps standard instead of the superior 405 line system. That didn't happen of course because of all the problems they had with the 240 line system. I've never seen a Baird T5 with the standards switch but I notice the timebase chassis in my T23 has had provision for the extra controls. DFWB.

4th Jul 2018, 5:24 pm	#23
peter_scott Dekatron Join Date: May 2003 Location: Edinburgh, UK. Posts: 3,274	Re: Baird T5 garage find There wasn't a problem making receivers. I think Baird got Bush to make the T5. The problem for Baird was that he had no viable camera and mechanical scanning used in the intermediate film process and the spotlight studio was struggling even with 240 lines. He also had the Farnsworth electronic camera but it had poor sensitivity and image distortion problems. Peter __________________ http://www.nostalgiatech.co.uk https://www.youtube.com/c/PeterScott/videos

4th Jul 2018, 8:14 pm	#24
Heatercathodeshort Dekatron Join Date: Jun 2005 Location: Warnham, West Sussex. 10 miles south of DORKING. Posts: 9,147	Re: Baird T5 garage find The 'Baird' T5 was built by Bush Radio in it's entirety. It is listed as the Baird/Bush T5 in some 1936 books. John.

4th Jul 2018, 8:54 pm	#25
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: Baird T5 garage find Weren't the Baird Cathodevisor cathode ray tubes made at the Crystal Palace works? J.L.Baird experimented with the production of large CRTs. DFWB.