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Old 2nd January 2008, 04:22 AM   #1
cwujek is offline cwujek  United States
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Default Strange find.. help ID?

I was given this old unit, was in the trash heap outside the science department of Whitman College in Walla Walla. Any idea what it is? Certainly is well built, nice construction all around. Pictures:
http://i72.photobucket.com/albums/i1...k/100_0240.jpg
http://i72.photobucket.com/albums/i1...k/100_0239.jpg
http://i72.photobucket.com/albums/i1...k/100_0238.jpg

Has some decent audio tubes, GE 6V6 and 6L6 power tubes, and a few others. Iron looks good too. It has a lightbulb in the middle (?), and a strange looking transformer and two towers with round disks that I'm clueless about. Lots of connections on the back... Any help with identifying what this is would be great.
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Old 2nd January 2008, 04:41 AM   #2
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Looks like a WWII radar unit.
Round disks are selenium rectifiers, probably unusable. Some transformers may be good, especially power ones for sure.

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Old 2nd January 2008, 06:23 AM   #3
Colt45 is offline Colt45  Serbia
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What's the tube lineup? might help us out a bit.


I'm going with something military... The army loves those $100 circular connectors.
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Old 2nd January 2008, 05:55 PM   #4
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Lets see, found outside the science dept. My guess is that it is some type of servo controller, or possibly the drive unit for a shaker table. Maybe just a big power supply. It doesn't look military since there are none of the usual military markings, lables, etc. Electrolytic caps are rare in military stuff.

I would get the numbers off of all of the transformers and google them, type the UTC numbers into Ebay as well. If they are popular audio items you will find out what they are, and what they are worth. It looks like there is some potential audio application for most of these parts, you just need to find out what they are. The stacked disks are selenium rectifiers. Do not use them, they emit toxic fumes when they fail, and they all eventually fail. The stubby little metal tubes look like 6H6's, dual diodes similar to 6AL5's.
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Old 2nd January 2008, 08:26 PM   #5
cwujek is offline cwujek  United States
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Tube lineup, in reference to this picture, starting at the bottom left going up.
Click the image to open in full size.
0A2
6V6GT
6SJ7
5YEGT
6SL6GT
6H6

Lightbulb

6N7GT/G
6N7GT/G
6SL7GT
6L6GC
6X5GT

6SL7GT
6SL7GT
6SN7GTB
6H6
6H6
6SL7GT

It does seem sort of like a military unit, although my guess is it's just a lab grade piece of some kind. Although there are those four large electrolytic caps, there's about 8 high voltage oil capacitors. The single potentiometer is a 2 watt sealed pot. Four UTC transformers, a matched pair of HA-106s, a single lighter colored HA-106, and a small S-3 transformers. Seems like some rather nice audio transformers. Time to gut it...
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Old 2nd January 2008, 08:53 PM   #6
Apex Jr is offline Apex Jr  United States
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The connectors in your photo are Cannon RK or Wk
series connectors, also known as RCA connectors..

You would probably be better off gutting this unit
and using the UTC transformers...And if you can
check out the unmarked ones you might have found
a goldmine in usable iron and parts...

Also agree with not using the old rectifiers...

Steve @ Apex Jr.
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Old 2nd January 2008, 09:50 PM   #7
60 is offline 60  United States
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could you show us the insides?
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Old 2nd January 2008, 10:30 PM   #8
cwujek is offline cwujek  United States
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Certainly. Here's two shots, let me know if you want more:
Click the image to open in full size.

Click the image to open in full size.
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Old 6th January 2008, 07:55 PM   #9
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Look at the picture of the main amplifier on page 37.

http://ephysics.fileave.com/spectros...950-p36-41.pdf
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Old 15th January 2008, 08:19 PM   #10
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sad that someone would just throw it away... nice find for you though
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