12 Feb
2015
12 Feb
'15
6:30 p.m.
On 2015-Feb-12, at 12:49 PM, Chuck Guzis wrote:
On 02/12/2015 11:51 AM, Kyle Owen wrote:
Well, just a data point, but I've never had to replace an IC in my ca-1970 HP2116,
composed of hundreds of SSI chips, 80-90%of which are CerDIP.
They're mostly CT?L, with some TTL, however.
(It's had one quad-pack core driver transistor failure.)
For that age and number of ICs, that's pretty good. Contrast even with other HP
equipment.
Darn! That sounded like a good collection. Alas,
I know I haven't kept
every bad IC either (except that one from the PDP-8/E...not really sure why
until now, I guess). But if you do find them, I could certainly use them.
Just curious--has anyone ever done a life-cycle study on plastic-packaged vs. CerDIP
packaged SSI TTL?