ASR33 selector magnet driver card

[Tony Duell]

> 
> djg at pdp8.net wrote:
> > 
> > If you are referring to CR1 and CR2 on the plug in card 181821/181823
> > they both seem to be 1N4383.  One I could read the entire part # and the
> > other all except the last digit.
> 
> ... and the replacement for 1N4383 is 1N4003, going by Moto Semi Data
> Book/1969. :)
> (Vf is a little lower: 1N4383=1.3V at 1A, 1N4003=1.6V at 1A, not likely to matter in
> the appl.)

.... And almost always you can replace a 1N400x with a 1N400y if y>=x. 
The last digit encodes the PIV of the diode, the lower the digit, the 
lower the maximum voltage. I assume that lower PIV versions are a 
fraction of a penny cheaper, which matters if you're doing a production 
run, but not if you're a hobbyist or doing a repair.

-tony