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Old 07-02-2010, 05:46 AM
Aussie Bloke's Avatar
Aussie Bloke Aussie Bloke is offline
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Join Date: May 2004
Location: NSW, Australia
Posts: 560
My image orthicon camera tubes

G'day all.

I've lately started up a collection of image orthicon camera tubes as I am interested in building a working camera out of them using modern solid state electronics or using original valves going by a Marconi MK3 circuit design I have. I have sort of talked about this in my previous thread http://videokarma.org/showthread.php?t=246979 .

I have obtained two 3 inch IO tubes from the 50s won in Ebay auctions, one a RCA 5820 and the other a General Electric GL-5820.

Anyways I would like to be able to get an exact year of manufacture on these tubes and I was wondering if anyone knows how I can date these camera tubes going by the printed/engraved numbers on them. Here are the given numbers:
RCA 5820: V3711 (also there's another number which is 4001)
General Electric GL-5820: 66781

Here are some pics of the two tubes below.
Attached Images
File Type: jpg 02072010745.jpg (66.0 KB, 10 views)
File Type: jpg 02072010748.jpg (75.8 KB, 8 views)
File Type: jpg 02072010749.jpg (89.9 KB, 7 views)
File Type: jpg 12042010240.jpg (83.6 KB, 5 views)
File Type: jpg 12042010247.jpg (78.1 KB, 8 views)
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