You should be able to see where the filament leads are. On most Tek CRT
tubes that would be pin 1 and 14. Confirm with the cathode to pin 2 and the 1st
grid to pin 3. Please verify this by looking at the CRT schematic. Also, check
the filament with an ohm meter. When you know where pins 1 &14 are, you can
see if the key fits back where it broke off. A dab of super glue may fix it for
good.
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Regards,
Tom
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----- Original Message -----
Sent: Friday, February 22, 2013 10:40
PM
Subject: [TekScopes] Oh No, I need the
T912 CRT pin out?
?
I have a T912 that had heavy use and was not working that I was given.
I fixed a number of transistors and got a trace working but still had
some intermittent problems.
For practice, I decided to give it a bath
(simple green, distilled water, blow dry and dehydrate) before proceeding with
additional work.
All was going well, lots of pictures taken for
reassembly, found a number of problems that could be the intermittent focus
and trigger problems.
In the cleaning process I took out the CRT and
removed the back connector.
The Problem: The black plastic Key pulled
off the CRT and pins with the socket.
I took lots of pictures but all
the wire looks black and not quite in enough focus to get it back right for
sure.
I know which way is up because of the front of the crt, and the
numbers go from 1 to 14 clockwise on the socket, if looking from the back side
of the tube.
But I don't know for sure where pin one is.
I have
downloaded the parts of the T912 manual from the web and looked at the
T921-922 manual and can not find a indication of pin 1.
The scope will
come out of the home made dehydrator this weekend and I would like to put it
back together.
Question where is the physical location of pin one on
the CRT in a T912 or where can one find out
Thanks for any help
John
Snyder
