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#10
March 16th 08, 04:02 PM
posted to rec.radio.amateur.boatanchors,rec.antiques.radio+phono,rec.radio.amateur.homebrew,sci.electronics.design
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Sylvania R1131C octal tube ?
I just posted a pic of them to alt.binaries.pictures.radio
Hank "Scott Dorsey" wrote in message ... K3HVG wrote: Henry Kolesnik wrote: I got a couple of the subject tubes which are supposed to be "glow modulator tubes". Best I can determine is that the light output will vary with current but I can't find data sheet googling. If anyone has pinout and/or data I'd sure like to see it. I think it might be a mid 1960s item as my 1957 Sylvania manual doesn't show it. thanks Sounds like what we used to call "crater" (sp?) tubes and were used in NOAA weather satellite optical printers for APT data in the 80's. Muirhead (UK) was the mfgr. of the receiver/printer units. I simply don't recall who mfg the tubes, though. They were octal based, however. Yes, it's definitely a crater tube. I don't have a data sheet on that one, but I have the phototube volume of the RCA HB-3 which has some other more or less similar crater tubes listed. The data sheet has a chart of light output vs. current and it's not very linear, but it tries to be. They were used in some early computer plotters and in a bunch of chart recorders as well. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
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