|
Page 1 of 1
|
[ 17 posts ] |
|
Author |
Message |
rebrands
|
Post subject: What is this octal "tube"? Posted: Nov Tue 12, 2019 5:53 pm |
|
Member |
 |
Joined: Jan Wed 11, 2012 5:12 pm Posts: 743 Location: Colorado Springs, CO
|
I got this in a lot of tubes and other radio parts. I can't find any reference to it in any tube site or on Google. The only marking is "VAR A3944". I'm thinking it may not be a vacuum tube at all and maybe is a ballast or the like.
Attachments: |

2019-11-12_10-37-28.JPG [ 259.49 KiB | Viewed 654 times ]
|
_________________ I'd rather be on the ground wishing I was in the air, than in the air wishing I was on the ground.
|
|
Top |
|
 |
Barry H Bennett
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 7:13 pm |
|
Joined: Nov Wed 30, 2016 7:35 pm Posts: 5390 Location: Sunbury, Ohio 43074
|
Could be a relay or crystal too. But most likely a tube
_________________ Preserving the hist. of electronics, one boat anchor at a time! :) https://www.bbtvtestequipment.com
|
|
Top |
|
 |
thunderbird281
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 7:26 pm |
|
Member |
 |
Joined: Feb Sat 06, 2016 1:47 am Posts: 2975 Location: La Mesa Califonia
|
Try and open it up. If the bottom does not come off it's a tube. Could be almost anything.
|
|
Top |
|
 |
azenithnut
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 8:08 pm |
|
Member |
 |
Joined: Jan Mon 18, 2010 2:13 am Posts: 19479 Location: Dayton Ohio
|
Could even be a cold cathode rectifier like an 0Z4.
They usually have a glass bulb inside the aluminum envelope.
-Steve
_________________ Radio Interests -Zenith -Sparton -Pre-War FM Consoles and floor models, the bigger, the better!
|
|
Top |
|
 |
rebrands
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 8:09 pm |
|
Member |
 |
Joined: Jan Wed 11, 2012 5:12 pm Posts: 743 Location: Colorado Springs, CO
|
Quote: Try and open it up. That was my first thought, but then I thought I'd give the forum at try.
_________________ I'd rather be on the ground wishing I was in the air, than in the air wishing I was on the ground.
|
|
Top |
|
 |
35Z5
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 9:31 pm |
|
Member |
 |
Joined: Jan Thu 01, 1970 1:00 am Posts: 13944
|
If it's aluminum, no doubt has something inside that can be removed. I've never seen aluminum used on a sealed tube, too much expansion/contraction.
_________________ Tom
|
|
Top |
|
 |
rebrands
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 9:59 pm |
|
Member |
 |
Joined: Jan Wed 11, 2012 5:12 pm Posts: 743 Location: Colorado Springs, CO
|
Well, curiosity got the best of me. I opened it up and this is what I found. I'm not well versed in diode identification. Would that be a 1n34? Anyway, there are four pairs in there. Still not sure what it was used for though.
Attachments: |

2019-11-12_14-49-09.JPG [ 280.37 KiB | Viewed 597 times ]
|
_________________ I'd rather be on the ground wishing I was in the air, than in the air wishing I was on the ground.
|
|
Top |
|
 |
Barry H Bennett
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 10:06 pm |
|
Joined: Nov Wed 30, 2016 7:35 pm Posts: 5390 Location: Sunbury, Ohio 43074
|
Possibly a plug-in gate for an early computer? Who knows.. maybe even someone used the can for their own experimental doodad.
_________________ Preserving the hist. of electronics, one boat anchor at a time! :) https://www.bbtvtestequipment.com
|
|
Top |
|
 |
n3uvt
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 10:08 pm |
|
Joined: Sep Tue 15, 2015 1:16 am Posts: 695 Location: 18424 PA
|
|
Top |
|
 |
Chas
|
Post subject: Re: What is this octal "tube"? Posted: Nov Tue 12, 2019 10:55 pm |
|
Member |
 |
Joined: Jan Thu 01, 1970 1:00 am Posts: 14396 Location: S. Dartmouth MA 02748-1225 USA
|
Ring modulator module.
_________________ Smith's Ale Gives Strength, Smith Bros. Brewers, New Bedford MA
|
|
Top |
|
 |
Bugman
|
Post subject: Re: What is this octal "tube"? Posted: Nov Wed 13, 2019 1:59 am |
|
Joined: Mar Sat 14, 2009 5:56 pm Posts: 4439 Location: VA 22602
|
Chas wrote: Ring modulator module. Hmmm, nothing like that in my Ring Doorbell.
_________________ I'm not a hoarder, I'm a caretaker of scarce commodities
|
|
Top |
|
 |
Tim Tress
|
Post subject: Re: What is this octal "tube"? Posted: Nov Thu 14, 2019 2:04 am |
|
Member |
 |
Joined: Jan Thu 01, 1970 1:00 am Posts: 9348 Location: Beaver Falls, PA. USA
|
Trace out the circuitry, and post what you have. That sure looks like a 1N34 diode.
_________________ Tim KA3JRT
|
|
Top |
|
 |
wazz
|
Post subject: Re: What is this octal "tube"? Posted: Nov Thu 14, 2019 2:46 am |
|
Member |
 |
Joined: Jun Wed 08, 2011 2:33 am Posts: 9538 Location: Ohio 45177
|
Looks to me like you have, some resistors, some nice crystal diodes for crystal radios and an octal socket for building a tube adapter or something.
_________________ Reddy Kilowatt says; You smell smoke? Sorry about that!
|
|
Top |
|
 |
rebrands
|
Post subject: Re: What is this octal "tube"? Posted: Nov Thu 14, 2019 5:54 am |
|
Member |
 |
Joined: Jan Wed 11, 2012 5:12 pm Posts: 743 Location: Colorado Springs, CO
|
Well, I was hoping there would be a flux capacitor in there. Here's the schematic, a little crude ,but it'll do. That's the bottom view of the "tube".
Aren't diodes used to block the reverse EMF when relay contacts open. I don't recall them being in parallel with resistors when used that way, but could it be?
Attachments: |

tube.jpg [ 83.78 KiB | Viewed 409 times ]
|
_________________ I'd rather be on the ground wishing I was in the air, than in the air wishing I was on the ground.
|
|
Top |
|
 |
fvan
|
Post subject: Re: What is this octal "tube"? Posted: Nov Sun 17, 2019 12:06 am |
|
Member |
 |
Joined: Mar Sat 01, 2008 10:02 pm Posts: 1203 Location: Mission British Columbia
|
|
Top |
|
 |
rebrands
|
Post subject: Re: What is this octal "tube"? Posted: Nov Sun 17, 2019 5:46 am |
|
Member |
 |
Joined: Jan Wed 11, 2012 5:12 pm Posts: 743 Location: Colorado Springs, CO
|
Well, so it wasn't a one-off or homebrew thing.
_________________ I'd rather be on the ground wishing I was in the air, than in the air wishing I was on the ground.
|
|
Top |
|
 |
ampstamp88
|
Post subject: Re: What is this octal "tube"? Posted: Nov Mon 18, 2019 4:39 am |
|
Member |
 |
Joined: Apr Sat 04, 2015 6:15 am Posts: 1339 Location: Dos Rios, CA. region
|
I wonder if it was made for some sort of military compressor or modulator as a plug in device to improve existing equipment Attachment:
Sylvania VECP 3.jpg [ 689.56 KiB | Viewed 227 times ]
? There's this schematic posted EDIT (above, guess my in-line messed up) from a '46 compressor/expander I want to build written by a Sylvania Electric engineer in Radio News that has a similar arrangement.
|
|
Top |
|
 |
|
Page 1 of 1
|
[ 17 posts ] |
|
|
|