28 Nov
2017
28 Nov
'17
3:47 p.m.
On 26 Nov 2017, at 21:06, Adrian Graham
<binarydinosaurs at gmail.com> wrote:
I replied to this thread a while back but managed to only reply to Tony and not the list,
oops! Rather than using my multi-transistor tester for TR103 I tested it with a DMM in
diode mode and it?s almost a dead short from B-E, I get the same reading in both
directions so I?m going to order a new one in a bit.
Replying to myself here but to my surprise the replacement 2SC2228 arrived today and the
machine is running nicely now, albeit with some screen wobble. I also tested the
replacement in my transistor tester and it was correctly identified as a BJT NPN so I
should?ve questioned it at the beginning but hey. Live and learn.
It?s currently running the built-in RAM test which is a lot more than it?s done for the
last 15 years :)
Cheers folks!
?
Adrian/Witchy
Binary Dinosaurs - Celebrating Computing History from 1972 onwards