6 Sep
2007
6 Sep
'07
7:52 a.m.
On 9/6/07, Roy J. Tellason <rtellason at verizon.net> wrote:
On Wednesday 05 September 2007 19:31, Ethan Dicks
wrote:
In the case of my PDP-8/L repairs, I've found the two most common ICs
to find dead are the 7474s and 7440s (and there are a lot of them in
there).
-ethan
I should probably find a source of a handful of
7483s since I have a
small stack of dead M220s. I don't know what's wrong with them yet
(probably dead 7474s if the rest of the machine is any indication),
but I'd hate to trace it to the adder and have no spares on hand.
Are 7474s problematic for some reason? I seem to remember having a bunch of
those, but I think in storage...