8 Apr
2012
8 Apr
'12
1:34 p.m.
-----Original Message-----
From: cctalk-bounces at classiccmp.org [mailto:cctalk-
bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: 08 April 2012 20:00
To: cctalk at classiccmp.org
Subject: Re: RD53 Disk Not Rotating
eiter. If
AFAIK, TIP125s are still pretty common (at least
in America). I have
a bunch in my toolbox. Presumably there is a good European equivalent
that is easily sourced in the UK (much like there are easy European
equivalents to 2N3904/3906, etc). Just look for pretty generic power
Darlingtons and narrow your search down from there with the Hfe and Ic
parameters (and perhaps cutoff frequency).
FWIW, most ocmmon US (and Japanese) transistors are not hard to get
here.
Certianly 2N3904s and 2N3906s are very common (I tend to buy they 50 at a
time..). I don't think you'll have any probkesm getting a TIP125 here
you can't find oen, let me know and I'll see
if I can find a supplier.
-tony
I hope I haven't made a mistake here. Rather than go to Farnell where I need
a minimum order amount, I looked on Ebay and found someone with some TIP125s
there.
I had assumed they were all the same and just chose this one:
http://www.ebay.co.uk/itm/TIP125-Transistor-/290672643190?pt=LH_DefaultDomai
n_3&hash=item43ad708c76.
I haven't spent a lot, so if I have bought the wrong thing it is no big deal
to go and find the right ones instead. On the original the only other
marking (apart from a TI logo) is "8702", but my web searches don't seem to
indicate that this means anything. The Ebay one has no other markings to
help me distinguish anything either. So, I don't know if I have bought the
wrong thing or not.
Are they all likely to be similar enough not to matter? Or should I be
looking for a closer match? Not that I know what a closer match would be.
Regards
Rob