What was this Seeburg tube used for?

radiowizard · Joined: 15 Jul 2006 Posts: 1103 Location: Zeeland MI

Digging thru a box-o-tubes, I found this: Gas Tetrode Tube Type BR-105050...It's by Raytheon, but the sticker is from Seeburg...is it a type of regulator?
RadioWizard
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tubenutt · Joined: 01 Jan 1970 Posts: 3219 Location: Medford,Or USA

The Raytheon BR was first made in 1932 doing duty as an auto radio rectifier in Motorola sets. A de-rated BH, if you will.
If you have a TV-7, I can give you the test set-up.
It was never a popular tube.
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Steve McDonald

radiowizard · Joined: 15 Jul 2006 Posts: 1103 Location: Zeeland MI

I have a Precision 910 tester, and a B&K 747B. If it was mostly for auto radios, wonder what Seeburg was doing with it? Didn't they only do jukeboxes, or did they do auto radios in the 30s?
RadioWizard
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Alan Douglas · Posted: Nov Wed 04, 2009 1:42 am

Can't be a BR, that's a rectifier not a tetrode. If it's Seeburg it's probably a thyratron controller for one of their juke boxes or wallboxes. Put "Seeburg" in the title and someone will notice it.

Fredfixer · Joined: 21 Sep 2006 Posts: 112 Location: Youngstown, Ohio

radiowizard; If you have the description right--gas tetrode--the jukebox folks may have used it for relay control in one of their wallbox setups. regards, Fred

radiowizard · Joined: 15 Jul 2006 Posts: 1103 Location: Zeeland MI

That is what is on the Seeburg label...Gas Tetrode...wonder what kind of gas is/was in it? Seems like there is a residue on the inside of the envelope. Mercury?
RadioWizard
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Tim Tress · Posted: Nov Wed 04, 2009 3:06 am

The Seeburg jukeboxes which had a core memory used a 2050 thyratron as a relay control tube; a "live" memory location would be picked up by a pulse amplifier and trigger the 2050, which would activate the trip solenoid in the changer mechanism. Wall box models also used a 2050 as a stepping-relay driver.

I don't know if the tube in question is related to the 2050 in any way.
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juke47 · Joined: 05 Sep 2009 Posts: 151 Location: Sun City, Arizona

Seeburg also made at least one type of gun game called "Shoot The Bear". I know it used at least one uncommon tube. Perhaps it is this tube. I believe it was some sort of sensor tube. I have never owned (wish I did) or explored a "Shoot The Bear" so my knowledge is near zero.

David (juke47)

deltysdal · Posted: Nov Wed 04, 2009 2:06 pm

I have the trashcan 1946 model and that is not one of my tubes.
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MouseMaster · Joined: 01 May 2009 Posts: 328 Location: South River, NJ

I own three Seeburg jukes, including one with the core storage unit (1955 V200). I hae not seen the tube you describe in any of my machines. Tim's description of the relay operation with the 2050 is on the mark. This is what my machine has. I can't say exactly what may have been in the wallboxes though, but I didn't think there were any tubes in them.

radiowizard · Joined: 15 Jul 2006 Posts: 1103 Location: Zeeland MI

Maybe the sticker/number is strictly a Seeburg item placed over the Raytheon number. An earlier post here mentioned car radio...wouldn't those have used Loctals?
RadioWizard
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Tim Tress · Posted: Nov Thu 05, 2009 2:11 am

The early Seeburg wireless wall-boxes used with the 146/147/148 "trashcan" and hideaway models did use a pair of 6C4s in each wall box; one as an RF generator, and one diode-connected as a rectifier. When coins were inserted in the box, it enabled a motor-driven pulser, which outputted a stream of RF pulses which corresponded to the number of the record which was selected. A TRF receiver in the jukebox picked up the signal, which was carrier-current coupled to the AC line between the wall boxes and the jukebox. The detected pulses fired a 2050, which drove a stepping relay connected to the selection solenoids.

The whole thing is VERY close in design to the Philco Mystery Control, except that the Philco system used radiated RF pulses.
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Tim KA3JRT

JukeBoxDenny · Posted: Nov Thu 05, 2009 3:47 am

HI- I did some checking, and it does cross over to the 2050 Thyratron application.

http://www.radiomuseum.org/tub ... 05050.html

http://images.google.com/imgre ... N%26um%3D1

Never seen one with that number before.

I do have 2 seeburgs that use the 2050.

Odd numbering system !

Dennis.
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drhydro · Posted: Dec Wed 30, 2009 4:23 am

This tube is a specially tested (and aged) 2050 thyratron that was used in the B-2 and B-3 intervalometers made by Seeburg during WW2.
The bomb release circuitry in most of the medium and heavy bombers used these; they were located in the nose, next to the bombsight.
See these pics: (this is my first post on this site; hope this method is OK!)

I have a couple of these intervalometers; and a complete, working Norden bombsight that I give talks and demonstrations with. Always looking for related hardware!

Best, drhydro- W5GNF

Bob E. · Joined: 13 Feb 2009 Posts: 155 Location: Santa Clara, CA

Very cool, Doc! Thanks for the pictures. I knew that Seeburg was doing work with the Norden bombsights during the war (while Rockola was building carbines...guess which one had more useful technology experience at war's end!), but I'd never seen pics of the hardware.

--Bob

Ken G · Joined: 01 Jan 1970 Posts: 11301 Location: twin falls idaho

Seeburg used 2050 in some of their jukeboxes in the selector circuit

radiowizard · Joined: 15 Jul 2006 Posts: 1103 Location: Zeeland MI

What bird is that shown installed in? Not overly familiar with the forward views of B17, 24, 25, or the Black Widow or P36...
RadioWizard
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drhydro · Posted: Jan Mon 04, 2010 10:03 pm

It's a B-25 Mitchell.

radiowizard · Joined: 15 Jul 2006 Posts: 1103 Location: Zeeland MI

Ah ha! Nice planes. Love someday to get a ride in one of the old bombers.
RadioWizard
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Curt Reed · Posted: Jan Tue 05, 2010 12:33 am

I darn near got to crawl into a Mitchell back on May 18, 1980 at an airshow here in town. It made a couple low passes over the town that morning before the airshow started and the pilot was pulling considerable manifold pressure out of those Wright R-2600 Cyclones, so it caught everybodys attention and woke up the late sleepers.

However, about the time I was going to crawl into it, the airshow came to an immediate halt and it was all over with. Looking to the southwest we could see it coming, and it looked absolutely horrible and is nothing I EVER want to experience as long as I live.

That morning Mount St. Helens blew its cork and the cloud of ash we had here is something I will never forget. All aircraft were immediately grounded at the airshow and the entire airport shut down for two weeks.

That ash is very abrasive and just like pouring valve cleaner compound into the air intake of an engine. That B-25, along with a couple P-51's, SNJ's and such sat where they were parked for over two weeks, meanwhile causing other airshows in the country to be called off because they were on a tour.

That was one of the worst days in the history of mankind in the northwest. I think I would rather survive living thru a nuclear explosion than that again.
Curt
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