Author Topic: Cossor 1039M oscillograph - a quick and dirty teardown  (Read 1786 times)

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Offline intabitsTopic starter

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Cossor 1039M oscillograph - a quick and dirty teardown
« on: April 14, 2019, 03:46:31 pm »
A quick look at this Cossor 1039M oscillograph (England, 1952) that I picked up a while ago at a garage sale.









See https://imgur.com/a/B26KJRo for captions to the images above



It's very nicely made, and I think worthy of a restoration effort (including recapping, etc).
I'll try to get onto that in the not too distant future...
 

Offline hexreader

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Re: Cossor 1039M oscillograph - a quick and dirty teardown
« Reply #1 on: April 14, 2019, 04:19:23 pm »
An interesting historical artefact indeed. Looks cool in those pictures. I cannot believe how clean it looks.

Once recapped, I would worry that most of the history will be lost, and you will have gained a truly terrible oscilloscope.

As an oscilloscope it is worth nothing, but as a piece of history it is priceless.

.... unless you can re-cap with genuine vintage replacements?

If it were mine, I would leave the cover off, put it in a glass case and never power it up.

Just my crazy random thoughts - feel free to ignore

I remember playing with one of these at School 43 years ago - and it was old and horrible to use even then. The wax capacitors and white-body 10% resistors bring a tear to my eye though.
« Last Edit: April 14, 2019, 04:31:48 pm by hexreader »
 
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Offline intabitsTopic starter

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Re: Cossor 1039M oscillograph - a quick and dirty teardown
« Reply #2 on: April 14, 2019, 04:56:15 pm »
You make very good points.

I would love to get it going, but as you describe, I'd then have a crap CRO, with much of its appeal lost.
I hadn't considered that, being too eager to just see a trace on the screen.
 
I think I'll probably not ignore your post, and just clean this thing up a bit. (Not sure about a glass case, though.)
And then I also don't have to consider the selenium issues.

Thanks for the reality check!

(There's lots of other junk around here that I could be directing my energies towards instead...)
 


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