Oh yeah forgot to thank Rich for his how-to. Very useful!
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Those look like CLIFF 3.5mm sockets:
https://www.farnell.com/datasheets/2720356.pdf (page 3)
Available in UK from:
https://cpc.farnell.com/cliff-electronic-components/cl13845g/jack-socket-3-5mm-mono-pcb-mount/dp/AV28091
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Yes they do, but it was the bargain price I got them for that was my issue, I think they cost around 25p each from the seller.
I also bought 100 from eBay in 2018 for £25, because I liked the chunky 1970ness.
Then some of the contacts turned out to be a bit dodgy, but I found this cure:
https://modwiggler.com/forum/viewtopic.php?start=10&t=27101
Nowadays I’m mostly Thonkiconned.
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I think we had a few of these in the physics department at high school, That was in the late 80’s and they were being replaced by newer technology.
Nice find.
I also remember them having these cool counter/timers that used decatron tubes for the least significant difits and an electromechanical counter for the most significant (and slower) digits.
Probably from the same place
TFW you order something and two weeks later you write to tell them it still hasn’t shown up and a few hours later it’s in your mailbox
(Barton FM Drum and JFET Phaser.)
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Now the big question is…
Is it NON-MACHINABLE (in red)
or is it NON-MACHINEABLE (on the stamp) ?
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You pay extra to avoid robots?
so it doesn’t go through sorting machines at post office the results can be quite horrible when the letter envelopes have stiff items like pcb’s in them .
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I was just making fun of the two ways they write it…
The word “machineable” doesn’t exist, and they use it on a stamp, an official item. Poor America…
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That must be a collector 
If they correct the mistake in subsequent printings, it will make this stamp mildly collectable.
Of course it exists, it’s right there in your post.
It may not be in the dictionary you like to use, but whose fault is that?
I just got this in the mail. I was hoping to use this for testing prototypes and whatnot, since its useful to have voltages other than +/-12 sometimes (9V, -6V or whatever). I was hoping to use a regular AC wallwart to keep mains voltages out of reach and off my desk, but I see that it expects a centre tap transformer at the input instead. Further down, however, there is a footprint for a bridge rectifier which, as far as I know, works without the need of a centre tap transformer. I guess this means that I just ignore that GND connection at the input? 
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I bought a used Tascam recorder on ebay. Device was in a not so good condition when it arrives, but it is doing what I need it to.
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Looks like a fairly quick build but I am away for a couple of days and my Synth Mojo has not been around for a few Months.
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