4 Oct
2007
4 Oct
'07
3:10 p.m.
On 4 Oct 2007 at 1:38, Roy J. Tellason wrote:
And in the 60's, logic families were less well-defined. I still have
some Fairchild 8-bit addressable memories (TO-100 can) whose
datasheet claims DTL as the logic family. +6 for Vcc and...+7vdc for
clock.
On Tuesday 02 October 2007 09:56, Allison wrote:
There are many
early families of saturated logic RTL is the oldest,
Which explains why I was seeing it first, and hobby-type projects based on it
back when. I remember one set of 9-pin sockets for which it was
apparent to me
that they were using something like a 12AU7, because of the
center-tapped heater connections. :-)
I used subminiature tube sockets for my first transistor projects--
they were easier to find than transistor sockets. Some transistors,
such as the 2N109 required the use of sockets--they were too
expensive to solder into a circuit.
Cheers,
Chcuk