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August 13th 11, 07:57 AM
posted to rec.radio.amateur.boatanchors
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Oddball Raytheon Subminiature Tubes QF-721
On Aug 12, 7:25*pm, (Scott Dorsey) wrote:
Robert Seely wrote: I have a bunch of Raytheon Subminiature tubes that I inherited from my Father, who was an electronics bugg (I followed a different path) that have code QF-721. *In searching the internet I have found a bunch of identical looking tubes such as one labeled CK6088. I have done lots of searches on the internet and I cannot find out anything about these and am wondering if you know about these, or if you can point me to a website that might shed some light on these. That's a Raytheon experimental number. *I have a Raytheon document dated 1953 which lists a bunch of the QF numbers but not that one. These were never intended to be sold to the general public and so were not listed in the handbooks. These are apt to be a variant of some relatively standard submini tube but without the original documentation or without a sample tube to put on the curve tracer I am not sure how we'd know precisely what it is a variant of. Almost certainly your father bought a bunch of these from a surplus dealer. *In the fifties and sixties there was a lot of wacky stuff coming loose from manufacturers like this. I am considering the possibility of donating these to someone but if I cannot find out what they are for, I cannot imagine how I can find who to donate them to -- perhaps a school or something. If you send me one I'll put it on the curve tracer and tell you more or less what it is. *Submini tubes in general are not worth very much because the Raytheon plant was still making them well into the late 1980s and they're still coming out of the surplus pipeline even today. *But they are still very, very cool and a lot of fun for small radio and audio projects. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." email me your address and I'll send you one. |
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