Iconoscope - UK Vintage Radio Repair and Restoration Discussion Forum

peter_scott · 22nd Jun 2005, 12:03 pm

Every wondered about how the iconoscope was constructed....

http://www.davidsarnoff.org/gallery-iams/cover.htm

ppppenguin · 22nd Jun 2005, 12:19 pm

What a wonderful archive! Thansk for pointing it out.

peter_scott · 22nd Jun 2005, 1:11 pm

I've wondered for some time how they inserted the mosaic into the envelope.
The article is comprehensive and very readable but unfortunately still didn't
really answer my question.

Peter

ppppenguin · 22nd Jun 2005, 1:47 pm

AFAIK, they rolled it up to get it in. Not easy, even though it was thin and flexible.

peter_scott · 22nd Jun 2005, 4:19 pm

Hi Jeffrey,

I suspected that was probably how it was done, but as you say it must have been difficult to avoid damage to the mica and its surfaces. I guess it was
inserted through the hole that takes the front optical glass. The "Television
comes to London" film shows some of the glass work but not this aspect.

Thanks,

Peter.

ppppenguin · 22nd Jun 2005, 4:37 pm

I believe that EMI kept it a closely guarded secret. I don't know about RCA.

peter_scott · 23rd Jun 2005, 10:49 am

Just found some nice old pictures here http://framemaster.tripod.com/oldindex.html

ppppenguin · 23rd Jun 2005, 1:59 pm

Inevitably we in the UK tend to know the history of British TV rather better than American TV. This site gives a useful time line for the USA. Typical American hype:

Quote:

New York City, Where Electronic Television Broadcasting Began!

22nd Jun 2005, 12:03 pm	#1
peter_scott Dekatron Join Date: May 2003 Location: Edinburgh, UK. Posts: 3,274	Iconoscope Every wondered about how the iconoscope was constructed.... http://www.davidsarnoff.org/gallery-iams/cover.htm

22nd Jun 2005, 12:19 pm	#2
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Iconoscope What a wonderful archive! Thansk for pointing it out.

22nd Jun 2005, 1:11 pm	#3
peter_scott Dekatron Join Date: May 2003 Location: Edinburgh, UK. Posts: 3,274	Re: Iconoscope I've wondered for some time how they inserted the mosaic into the envelope. The article is comprehensive and very readable but unfortunately still didn't really answer my question. Peter Last edited by peter_scott; 22nd Jun 2005 at 1:24 pm.

22nd Jun 2005, 1:47 pm	#4
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Iconoscope AFAIK, they rolled it up to get it in. Not easy, even though it was thin and flexible.

22nd Jun 2005, 4:19 pm	#5
peter_scott Dekatron Join Date: May 2003 Location: Edinburgh, UK. Posts: 3,274	Re: Iconoscope Hi Jeffrey, I suspected that was probably how it was done, but as you say it must have been difficult to avoid damage to the mica and its surfaces. I guess it was inserted through the hole that takes the front optical glass. The "Television comes to London" film shows some of the glass work but not this aspect. Thanks, Peter.

22nd Jun 2005, 4:37 pm	#6
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: Iconoscope I believe that EMI kept it a closely guarded secret. I don't know about RCA.

23rd Jun 2005, 10:49 am	#7
peter_scott Dekatron Join Date: May 2003 Location: Edinburgh, UK. Posts: 3,274	Re: Iconoscope Just found some nice old pictures here http://framemaster.tripod.com/oldindex.html