JLB speaking in Australia in 1938

[Viewmaster]

If you register with Movietone at...
http://www.movietone.com/
You will find Baird actually seen interviewed for 1 minute when in Australia in 1938.
Just search for 'Baird' etc etc. or enter Story No 33229

Also many other TV goodies as Steve (Panrock) has mentioned...(was it here or that other TV forum place?).

Old newsreels on many subjects are available to see if you register.

Albert.

[NutmegCT]

Albert - thanks for the link. Never used that site before.

I also checked the 1928 Popular Science pages posted here. Was surprised to read that JLB used a human eye in his early work as an improvement over the first photocell.

Tom

[Stephen]

Thanks, Albert! I have never seen this clip before.

[Panrock]

Yes I noticed this while searching back to 1935. I have yet to search back to 1926 when there may be still more treats in store!

Steve O

[Panrock]

Done the above now and discovered a description of mechanical television in 1931 from the USA. The title to look for: "TELEVISION MAKES PROGRESS IN THE U.S.A. - COMB". Is one of the two gentlemen we see Jenkins perhaps?

First we are told that "Pioneered in this country, (the) American experiment is based on the methods of British scientists', heh heh...

It's all explained in detail, and use giant photo-electric 'tubes' and a 48-hole scanning disc at the camera end revolving at 20 times a second.

Then, at the receiving end, after a 'public-address-type' amplifier, we have a 'light valve'. Here, a lens disc is used. The picture is projected onto a screen.

The results shown are very good and it looks like horizontal scanning was used. Just a little smeariness in the picture. The whole thing looks very impressively constructed, as we would expect of American engineering.

Steve

[Stephen]

Thanks, Steve! This is a very interesting newsreel. It is story number 6627.

Actually, the 48 line, 20 fps system indicates that it is the American General Electric System. There is a listing of the American and Canadian television stations and their broadcasting standards at http://www.earlytelevision.org/mechanical_stations.html .

[Panrock]

Wonderful stuff Stephen!

Would the 'light valve' have been a Kerr cell? I never managed to get this working myself, but then my courage ran out when there I got up to 1000 volts across the narrow gaps of a tuning capacitor submerged in Nitrobenzene!

[Stephen]

Would the 'light valve' have been a Kerr cell?

Yes, by 1930 I believe that various organisations were using the Kerr cell as a display light valve for projection purposes.

[Telehor]

Sadly the Movietone site had no matches for "pre 1929 television"
Indeed the cell with liquid must be a Kerr cell.
The whole report was from General Electric at Schenectady and about the GE 48 lines/20 fields system.
My replica of the Octagon is also on that system.
The latest information received form the Schenectady Museum about the neon used in the Octagon is on my pages : it is a "Moore lamp" http://users.skynet.be/telehor/octagon%20descrip.htm