9 Jun
2009
9 Jun
'09
4:46 p.m.
I don't know where you are physically located (?) but I still think this
will be helpful. First place I check is the NTE Cross Reference Search ;
http://nte01.nteinc.com/nte/NTExRefSemiProd.nsf/$$Search?OpenForm
I've found it to be very helpful finding replacement parts and even
datasheets I couldn't find elsewhere. According to their PDF datasheet an
NTE123A is a replacement. TO18 package, 40 Volt, 0.8 Amp, 300 MHz NPN
bipolar transistor. A 2N2222 would not work well here. Hope this helps.
Best regards, Steven
----- Original Message -----
From: "O. Sharp" <ohh at panix.com>
To: <cctalk at classiccmp.org>
Sent: Monday, June 08, 2009 10:25 PM
Subject: Transistor Substitution
Okay: I admit it, I am sometimes pig-ignorant about basic hardware
questions. :/
I have a couple of DEC machines which I need to replace a few components
on, and also stock up spares of others. With the transistors and diodes,
however, I often can't find a direct replacement - and don't know how to
figure out what a modern substitute is.
For a 2N3009, for example, I can find basic information and a datasheet
online easily enough - but as for choosing a functional, available
substitute for it, I'm honestly not even sure where to begin.
Is there a basic resource for determining modern equivalents for older
transistors and diodes? Can someone helpfully provide me with a clue
here? :)
Thanks!