11 Apr
2012
11 Apr
'12
1:44 p.m.
On 2012 Apr 11, at 12:48 PM, David Riley wrote:
I think the 2N2907 part is basically aimed at the same application
area
as the older A55, but it benefits from newer processes. You'll find
that in a lot of transistors; I'm still a little baffled as to what
the
quantitative difference between a 3904 and a 4401 is aside from
slightly
better current capabilities on the 4401. Typically I can swap one for
the other with no problem unless I'm blowing up 3904s.
Probably something like Motorola vs Fairchild. I'm just guessing, but
in preponderance of personal observation of equipment made back when
they were new, I think 440x has been more Fairchild and 390x more
Moto or TI. Everyone cross-supplies of course, but it would be nice
if there were a resource available to look back at which manufacturer
a particular type originated with.
(Why is there a 40 min. delay for messages getting through
distribution?)