Big Ass Tube - Help needed

[Joe-N2YR]

siemens rt 125/2000 model 1101237v006

This thing weighs about 10 pounds, Total length is about 24 inches, 6 in diameter. Heavy glass envelope, Very Big plate cap-heat sink that is cast construction, 24 fins approx. 1/4 inch thick, one inch deep. The base has 2 pins, that look like stove pipe top hats. They are about 2 1/2 inches in total length, the brim of the top hats are about 1 1/4 diameter,  stove pipe is about 1 inch diameter, one pin stove pipe is a composite insulating material same dimensions.The base also has two locking pins.

Extending from the top of the metal base there is a 6 inch sleeved harness that terminates into a big barrier strip. The harnass contains one green wire that is connecte to he harnass chassis mounting stud, two yellow wires and a translucent teflon sleeved wire. All wire sizes appear to be 14-16 stranded. Base pins show 0.9 ohms resistance. I believe they are the heater connections. On the tube label is printed "Heizstrom 11.2A". Ohms law would yield a filament of 10.8 volts

The web so far has yielded no results. Thanks for help anyone can provide.

[W2PFY]

Would you be able to post a picture of that monster?

[Joe-N2YR]

I am working on that now !

[WA3VJB]

I translated "big ass tube" into the German and found it immediately, dumbkoff !


Actually, I dropped an email to Rälf at German Electronics Company in Florida, and he's checking the books for you.  Tentatively,  it's a high voltage regulator tube, a triode, for a "Pandora" system that Siemens made.

 

[Steve - WB3HUZ]

Don't let this happen to you OM!

[K1JJ]

Don't let this happen to you OM!

Nice tube for display, Joe!

I hate to admit it, but at one time [1972] I had SIX working 750TL's. They came out of scrapped Collins TDH-5 Navy transmitters from WWII.  Oh, they were grand looking tubes, about 17" tall if I remember?  Two were in my rig.  Four were in storage.

One by one they all bit the dust. Four died due to the lack of tungstun in the filaments from the War shortage. Filament springs sitting in the bottom.  Another was sitting on a shelf on display and the shelf got rammed. The tube smashed to the ground.

The last one I gave to the Derb, who put it in a museum in W3 land.   

I have just one BW picture of them running in my rig. Classic tubes.  I wish Gary cuda used a pair in his 450TL[H]?  rig.

T

[W2PFY]

Show us the picture JJ. This was my 750TL. Had it to the Hoss traders but no one wanted it. Sold it on epay

[W2VW]

Dr. Terry's labor-atory.

[WA3VJB]

Yeup, that's a Big Ass Tube alright :

Joe says it'll make a great lamp. (He found one with this image on an internet auction site.)



See the specs here:

http://www.netohio.com/wa3vjb/rt125-2000.JPG

[Gary - WA4IAM]

You may wish to email Lud Sibley via the Tube Collectors Association web site. He can spread the inquiry via the TCA reflector for you. Knowing him he may have the stats on the Siemens tube in his very extensive archives.