Look what my buddy found in his attic.

[chongmagic]

I am trying to find out more about it, it seems to be a rebranded Heath Kit.

 

[chongmagic]

I powered it up on a variac and the power bulb comes on and it has a tiny line in the display. Most likely the tube is toast, but I can't find a manual anywhere.

 

[chongmagic]

Anyone know of any place off hand that might tell me more about this little gem?

 

[darwin999]

Do you know which Heathkit model it corresponds to?
There were a lot of models, e.g., https://jefftranter.blogspot.com/2017/07/heathkit-oscilloscopes.html

 

[darwin999]

Heathkit , Heath Co.; Benton Harbor from Multiplex Adapter A | Radiomuseum.org

Heathkit , Heath Co.; Benton Harbor from Multiplex Adapter AC-11 to Service Bench, model, United States of America (USA), 637 pictures, 242 schematics

www.radiomuseum.org

Hmm, looking at these it appears that it's not the 1950s models, and by 1975 they had gone to a square CRT.

And per this link, the Commercial Trades Institute of Chicago may have ended in 1970 (or at least they moved from this building then, but they seem to not be around today). https://collections.carli.illinois.edu/digital/collection/uic_pic/id/27807

So I might suggest looking for pics of the 1960s Heathkit models, to find that model #, then search for manuals for it.
There do seem to be several Heathkit fan clubs out there, they could help you, too.

 

[chongmagic]

Thing is nuts underneath.

 

[chongmagic]

CRT

 

[darwin999]

Holy shit, that looks like it was wired by Dennis the Menace, I wonder if it ever worked...
Just take care around the higher voltage circuitry that drives the CRT!!! Including leftover stored charge on any caps.

 

[Gordo]

Jeebuz, that looks as bad as my first build. For the record it didn’t work either…

 

[jwin615]

Holy shit, that looks like it was wired by Dennis the Menace, I wonder if it ever worked...
Just take care around the higher voltage circuitry that drives the CRT!!! Including leftover stored charge on any caps.

I second this.
Don't poke the Beaver without proper protection!

 

[GAStan]

I powered it up on a variac and the power bulb comes on and it has a tiny line in the display. Most likely the tube is toast, but I can't find a manual anywhere.

Don't write it off yet. All this will have is a line with no input, if that. This scope will have no writing in the display, just the trace. The trace (line) needs a trigger. Adjusting the trigger input and Sync Amp(litude) should get a solid horizontal line. If you'll post a pic showing ALL of the various controls and inputs/outputs labels I can probably help you more.

 

[chongmagic]

Don't write it off yet. All this will have is a line with no input, if that. This scope will have no writing in the display, just the trace. The trace (line) needs a trigger. Adjusting the trigger input and Sync Amp(litude) should get a solid horizontal line. If you'll post a pic showing ALL of the various controls and inputs/outputs labels I can probably help you more.

Here is the actual front panel of the device.

 

[Markus Kersius]

Don't poke the Beaver without proper protection!

 

[GAStan]

Here is the actual front panel of the device.

View attachment 91032

I cannot see the labels on the red & black jacks across the bottom. I need to be able to read them.