[AMRadio] Capacitor sources... an idea


Barrie Smith barrie at centric.net
Mon May 3 21:32:50 EDT 2010


A PDP-8, eh?

Good grief, I had a couple of PDP-8Es in around 1970.  Soon went to PDP-11s, 
then a VAX.

My, how time doth fly.

73, Barrie, W7ALW


> Gents, I once had the privilege of touring (part of) the Western Electric 
> facility in
> Cicero, IL courtesy of my electronics instructor, Harry umm 
> somethingorother.
> I don't know whether the setup we all saw was WA's main capacitor 
> production
> device, but it sure was cute.  A PDP 8/I was being used as a 
> process-control computer (someone sells DIY kits for these now...) for a 
> foil+dielectric winding gizmo.
> Set up the foil and plastic rolls, click to the desired value and let 'er 
> rip.
>
>    Man, she was pretty.  [ oh.. it was Harry Wheaton IIRC ]
>
>   This COULD be duplicated by someone with a yen to DIY; hey,
> there's a fellow in France who manufactures his own vacuum tubes
> from start to finish; they DO work, I'm told.
>
>   Just a vagrant thought for your delectation.
>
>     73 all,     Terry KC9KEL
>
>
>
>
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