24 Feb
2003
24 Feb
'03
12:13 p.m.
I've posted some pictures of the IBM digital demo unit at
<http://home.cfl.rr.com/rigdon14/ibm/>.
Any info on using it would be appreciated.
Also posted is the schematic of the TH-1, "one shot" using the 2D21 tube (SCR
with a pilot light!).
Joe