What was this Seeburg tube used for?

radiowizard · Member Joined: 15 Jul 2006 Posts: 785 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 · Posted: Nov Wed 04, 2009 12:41 am

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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radiowizard · Member Joined: 15 Jul 2006 Posts: 785 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?
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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 · Posted: Nov Wed 04, 2009 1:45 am

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 · Member Joined: 15 Jul 2006 Posts: 785 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?
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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 · Member Joined: 05 Sep 2009 Posts: 28 Location: 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 · Posted: Nov Wed 04, 2009 9:53 pm

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 · Member Joined: 15 Jul 2006 Posts: 785 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?
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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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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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