Sylvania R1131C octal tube ?

[Henry Kolesnik]

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

 

[Richard Knoppow]

message

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

Google is your friend. See:
http://www.radiomuseum.org/tubes/tube_r1131c.html for a
little information. Unfortunately they require a membership
fee to download the datasheet illustrated.
Evidently these tubes were orginally used for early
facsimile machines (the sort used to send newspaper wire
photos) but the search shows it was also used extensively in
vision research.
Perhaps someone knows of a better source for the
datasheet.

 

[Robert Baer]

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

I have a Sylania Technical Manual of tube data sheets dated 1959 and
have the blue add-ons to 1960, and that tube is not listed anywhere in it.
Sorry.

 

[Mike Schultz]

Google "crater lamp"

 

[K3HVG]

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.

 

[Scott Dorsey]

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

 

[Henry Kolesnik]

I just posted a pic of them to alt.binaries.pictures.radio
Hank

 

[Jim Menning]

I just posted a pic of them to alt.binaries.pictures.radio
Hank

It's also got a very interesting mounting collar on it. Is that part of the tube
socket, or completely separate from it?

 

[Henry Kolesnik]

The octal socket and mounting bracket are separate items.

 

[Martin Riddle]

I have a Sylania Technical Manual of tube data sheets dated 1959 and have the blue add-ons to 1960, and that tube is not
listed anywhere in it.
Sorry.

Hi Robert,

I have some PDF's of scanned tube manuals(Eimac, Taylor RCA), I would love to trade a few for a pdf of the Sylvania Manuals.
If interested email me.

Cheers

 

[Richard Knoppow]

Hi Robert,

I have some PDF's of scanned tube manuals(Eimac, Taylor
RCA), I would love to trade a few for a pdf of the
Sylvania Manuals. If interested email me.

Cheers

There is a Sylvania tube manual on-line at:
http://www.pmillett.com/sylvania_tube_manuals_online.htm

However, it does not cover the R1131C

Lots of other good stuff on this site including several
RCA tube manuals and many books. All in PDF form but _very_
large files.

 

[gudmundur]

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

Everyone replies, and yet you get no answers,

R-1131C,D
Max dcv 150
ma. 3-25
peak ma. 55
starting voltage 225
crater dia. .093
candelpower .2@25 ma.
light color white

 

[JosephKK]

There is a Sylvania tube manual on-line at:
http://www.pmillett.com/sylvania_tube_manuals_online.htm

However, it does not cover the R1131C

Lots of other good stuff on this site including several
RCA tube manuals and many books. All in PDF form but _very_
large files.

Pretty good, but not my idea of big files. That starts with very full
CD images and up. I do not bat an eye at downloading full multiple
DVD distributions of Linux. I have dual layer rewriters and media as
well.

 

[Richard Knoppow]

Everyone replies, and yet you get no answers,

R-1131C,D
Max dcv 150
ma. 3-25
peak ma. 55
starting voltage 225
crater dia. .093
candelpower .2@25 ma.
light color white

What is the pin arrangement?

 

[Richard Knoppow]

Everyone replies, and yet you get no answers,

R-1131C,D
Max dcv 150
ma. 3-25
peak ma. 55
starting voltage 225
crater dia. .093
candelpower .2@25 ma.
light color white

What is the pin arrangement?

 

[gudmundur]

What is the pin arrangement?

This Sylvania industrial tube catalog has ratings only, and
sadly no pinouts. It does say the light beam can be modulated
up to 1 mhz. Pretty good bandwidth for old technology.

 

[Henry Kolesnik]

Thanks for all the help..
I also found this on an old schematic where they show a 1 meg resistor
across the 3 & 7.
pin 3 cathode
pin 7 anode