Help me ID this computer part from the 1950's *Updated 12/17/2016*

SketchMaster

Diamond Member
Feb 23, 2005
3,100
149
116
Backgound:

My Grandfather worked for MIT as a physicist. He found this along with other parts in the "garbage pile" where they tossed old parts/systems that were no longer being used. It was never confirmed, but my grandfather believed they are parts from the Whirwind computer. Memory modules to be more precise.

I figured after having this sit in a drawer for years, I'd put it on the web to find out if jumps out to anyone. I'd love to know what it does and what it's from.







********Update*********

So I decided to throw this question on a subreddit to try and take another crack at figuring out what this is. That lead me to start googling a bit more, where I found the DUMBKOPF 1 listed on eBay (be sure to scroll down). It had parts that look exactly like the one I have. Getting excited, I started looking around for anything on this unit but only found a light discussion about it with not a lot of useful info. Then I took a closer look at the control panels on the DUMBKOPF and saw "Phone line Demodulator". I googled that with some other keywords, and that lead me to this document from MIT's archives.

Am I on to something here? I'm trying to get in touch with my grandfather to see if any of this rings some bells. This is starting to get exciting!
 
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pcgeek11

Lifer
Jun 12, 2005
21,512
4,607
136
Huh? Pretty sure tubes were all socketed cuz they burn out and have to be replaced.


My post was in response to:

Originally Posted by SKORPI0 View Post
Probably an IBM Computer Pluggable Unit Tube Assembly, pulled and replaced when the tubes burned out.

And you are correct I have never seen a soldered vacuum tube. But even if they were you could still replace them....
 

master_shake_

Diamond Member
May 22, 2012
6,430
291
121
My post was in response to:

Originally Posted by SKORPI0 View Post
Probably an IBM Computer Pluggable Unit Tube Assembly, pulled and replaced when the tubes burned out.

And you are correct I have never seen a soldered vacuum tube. But even if they were you could still replace them....

most people weren't stupid enough to solder them in to place.
 

MongGrel

Lifer
Dec 3, 2013
38,751
3,068
121
Nice old school stuff, believe it or not about 6 or 7 years ago the place I was at set up some old school test equipment that had been hanging around since at least the early 70's in one area, still wasn't sure what the purpose was.

But many things were isolated there as far as why things were done sometimes. The relays sounded like about a 1000 crazed typists on amphetamines when that area was in use.

Used to fabricate a lot of things for Draper Labs out of MIT myself.
 
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WHAMPOM

Diamond Member
Feb 28, 2006
7,628
183
106
Backgound:

My Grandfather worked for MIT as a physicist. He found this along with other parts in the "garbage pile" where they tossed old parts/systems that were no longer being used. It was never confirmed, but my grandfather believed they are parts from the Whirwind computer. Memory modules to be more precise.

I figured after having this sit in a drawer for years, I'd put it on the web to find out if jumps out to anyone. I'd love to know what it does and what it's from.






Don't know, but it is now a beautiful piece of steam-punk art.

edit: should check it at a Tech Museum, if that is an early memory module, it could be worth alot.
 
Last edited:

pcgeek11

Lifer
Jun 12, 2005
21,512
4,607
136
Where in my sentence did I state that the vacuum tubes were soldered/not socketed?


It sounded like what you were saying by your statement below. That the entire card ( unit ) was pulled and replaced when the tubes burned out.

" Originally Posted by SKORPI0 View Post
Probably an IBM Computer Pluggable Unit Tube Assembly, pulled and replaced when the tubes burned out."
 

styrafoam

Platinum Member
Jun 18, 2002
2,684
0
0
If my google image skill is up to snuff my guess is that is part of the famous ENIAC. Specifically it's ballsack.
 

Red Squirrel

No Lifer
May 24, 2003
67,907
12,376
126
www.anyf.ca
Sound Blaster 2.

Actually if I had to guess it's some kind of logic comparator. Two values go in (on or off) and one value comes out (on or off).
 
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