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My newest oldest oscilloscope - GEC M861B Miniscope

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dazz1:
And some more photos

TomKatt:
That's really cool  8)

I've got a late 40's Waterman 'Pocket Scope' - similar design but larger 3" crt.  Replaced the dried up 2-prong line cord + a few old paper caps and it still works fine.  I use it for audio signal decoration and some ucontroller vector projects.

Don't have access to photos of my scope, but here is a link to the same model I have (with scan of operating manual)

factory:

--- Quote from: tautech on June 05, 2024, 08:46:04 am ---
--- Quote from: dazz1 on June 05, 2024, 05:44:47 am ---
--- Quote from: ebastler on May 15, 2024, 06:40:09 pm ---Beautiful! But where are the teardown photos?  :)

--- End quote ---

You can follow along here:
[url=https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107]https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107] [url=https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107]https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107]https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107] [url]https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107]https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107]https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107]https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107] [url]https://www.vintage-radio.net/forum/showthread.php?p=1638107#post1638107[/url]

--- End quote ---
Link incorrectly linked.
https://www.vintage-radio.net/forum/showthread.php?t=209669

Seems Dazz has made new friends but none of them seem to have the porcelain valve holder I might have.  :P

--- End quote ---

I'm guessing you didn't read post #71 on the radio forum?

David

dazz1:

--- Quote from: factory on June 05, 2024, 07:12:56 pm ---
--- Quote from: tautech on June 05, 2024, 08:46:04 am ---
Seems Dazz has made new friends but none of them seem to have the porcelain valve holder I might have.  :P

--- End quote ---

I'm guessing you didn't read post #71 on the radio forum?

David

--- End quote ---

He is sending me valve bases and a can all the way from the UK at no charge.  Very generous and helpful.  No chance of me buying valve bases locally.

dazz1:
Hi
Some more photos.

A selenium diode in pieces.  Just disks held together with springs.

Some leaking caps.

Soaking a seized potentiometer in hot kerosene in an egg cup, in a bowl of boiling water.  It worked really well.

A close up reference photo before I cut out and replace mica caps, encased in bakelite, covered in wax.

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