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Old 26th February 2011, 09:27 PM   #1
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Default Has anyone seen one of these before?

Hi everybody

I thought it would be fun to have a tube driven oscilloscope to use when I build my tube amps. I got this one from eBay. It is in really good shape and has all of its pieces. For some reason though, all of the manufacturers plates have been removed. Have any of ever seen one like this, or know who made it, I'd like to try to find a manual for it.

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Old 26th February 2011, 10:15 PM   #2
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Could be a Waterman or perhaps one of the ones sold by correspondence course people.

It goes back to the 1940s or so, maybe a bit later. What tubes does it use? I suspect very limited bandwidth, maybe 100 kHz.
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Old 27th February 2011, 01:32 AM   #3
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Originally Posted by bob91343 View Post
Could be a Waterman or perhaps one of the ones sold by correspondence course people.

It goes back to the 1940s or so, maybe a bit later. What tubes does it use? I suspect very limited bandwidth, maybe 100 kHz.
I saw a 6L6 and a 12ax7 in there, there were also three other tubes that I can't remember now.
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Old 28th February 2011, 03:34 AM   #4
Enzo is offline Enzo  United States
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I don't know what it is, but it looks just like the little scopes we built in high school electronics lab. That was for me back in about 1962. We were still learning tubes, transistors had not taken over yet. The teacher gave each pair of us at our bench the chassis and main parts, plus the schematic, and we had a parts room for resistors etc. And we built them.

Geez that looks just as I remember them. Of course 50 years can cloud the memory.

Is the power transformer sealed in a rectangular container?
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Old 28th February 2011, 03:43 AM   #5
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Originally Posted by Enzo View Post
I don't know what it is, but it looks just like the little scopes we built in high school electronics lab. That was for me back in about 1962. We were still learning tubes, transistors had not taken over yet. The teacher gave each pair of us at our bench the chassis and main parts, plus the schematic, and we had a parts room for resistors etc. And we built them.

Geez that looks just as I remember them. Of course 50 years can cloud the memory.

Is the power transformer sealed in a rectangular container?
Yeah, it's a square sealed transformer. I opened it up again today. It has a total of nine tubes in it. I was able to figure out that it was made by the Hickok company for the navy signal corps possibly as early as the forties. I made a new power cord for it today, and it works perfectly.
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Old 1st March 2011, 12:10 AM   #6
Enzo is offline Enzo  United States
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Very cool.
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Old 1st March 2011, 01:28 AM   #7
Pano is offline Pano  United States
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Modern art, that thing is! Love it.
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