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Post by juke46 on Sept 15, 2019 11:47:18 GMT
 I got these somewhere. It has been suggested they were used in some sort of coin op game like a shooting gallery. I haven't any idea. I have a number of the black tubes but only the one clear tube. IP39 is listed as "photo cell detector" . Maybe part of an electric eye that opened doors in "the old days"? |
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Post by Ron Rich on Sept 15, 2019 12:50:03 GMT
Hi David,
Just a guess ?? Seeburg "RayOlite" guns ? (Shoot the bear,etc.) If so, and GOOD, they may be worth big $$ ?? Contact Bob at sales@tubesound.com He's a nice guy, nd wll tell you-- Ron Rich
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Post by juke46 on Sept 16, 2019 10:16:09 GMT
RayOlite - That is really interesting. I'll check and see what we find out! It seems like that technology was really advanced for its day. Your wealth of knowledge is always appreciated.
Thank You Ron!
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Post by Ken Layton on Sept 30, 2019 1:53:55 GMT
Type 1P39 is typically used in colorimetry (color comparison).
Pin 4 is plate and pin 8 is photocathode. Operating voltage is 250 volts DC.
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Post by spetersen on Oct 27, 2019 23:54:19 GMT
Maybe street lights? I have 1 somewhere?
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Post by Startgroove on Feb 6, 2020 16:38:02 GMT
High-vacuum phototube with high sensitivity to light sources predominating in blue radiation, and negligible sensitivity to infrared radiation. It is useful in light-operated relay, measurement, and color-control applications.
The RCA JAN-CRC-1P39 was the light sensing element used in the AN/ASH-4 Light & Time Recording Set, a device used to determine the yield of a nuclear explosion.
Cheers, Russie
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