28 Oct
2025
28 Oct
'25
1:28 p.m.
On Tue, 2025-10-28 at 14:58 -0500, Jon Elson via cctalk wrote:
On 10/28/25 14:03, Martin Bishop via cctalk wrote:
IBM 1401 SMS circuits used an inductor, typically 56µh but sometimes as
small as 1.5µh, which I was told was to reduce either the switching or
storage time (I don't remember which). See for example
http://vandyke.mynetgear.com/1401/docs/ALD/SMS/370143/370143.pdf or http://vandyke.mynetgear.com/1401/docs/ALD/IBM-StandardModularSystem-Neff7.…
or http://vandyke.mynetgear.com/1401/docs/ALD/223-6875-1_IBM-SMS.pdf
Is there a name for that?
Schotky diode the keep the base out of saturation
?
As used in 74S 74LS, appreciate it's an extra component to bodge in
see eg
https://electronics.stackexchange.com/questions/242715/using-a-schottky-dio…
That's called a Baker clamp, was commonly used back in the
mid '60s.