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Don't forget that PC fans are good and bad. If you want something good buy Noctua, or, in a pinch, BeQuiet. <durechenew@...> wrote:

Please forget my above remark. It's wrong. Raymond

That's done to improve focus tracking (making focus less dependent on beam current i.e. screen brightness). Raymond

The links are fine. I just wouldn't add the quotes because they are of no help, at least not to me, neither in Firefox nor in Chrome. Either highlight the whole url, including the trailing digits, and

Hi Dave, Spoiler alert! Don't look any further if you want to think about it a bit more, but here's the giveaway: Brown and red stripes for the wire connected to pin 12 of the CRT, etc. Strictly

Uploaded a couple of new pictures, though I see that the one Raymond uploaded does also show VR1434/C1434. Just didn't realize yesterday those were the pin 12 drivers. This one shows the same diagram

Thank you, Raymond and Siggi, for taking the time to answer to this post. Unfortunately the motor of the blower is beyond repair (back side bushing is completely broken), therefore the whole stuff

Just to clarify, because it seems I might have mislead Stephen to think I was suggesting something needed to be done: I was mystified as to how the "mesh" was being driven at all because I missed that

I don’t know that yet... But I’ll report back when I’ll get to it. I’m working on another restauration project at the moment.

Of course I was! ?

Raymond, Yes, I read that. But I thought maybe it could eventually be modified. Which I was not gonna even try to do, even if it was possible. I’ll just try to make it work the way it is. After all,

Not sure if you were joking. I was dead serious and Tek assumed people working on the 'scope weren't color blind. Have a look at the colors on the other wires going to the CRT. Raymond

You can't do without any voltage on pin 12. See Satbeginner's message. A bias voltage of about 150V is needed or all electrons will just land on the grid and die/charge it. IOW: If the image is fine

Thank you Michael! ?

Because the designer was colorblind?? ??♂?

Stephen, Here is a link to an excellent article on the Vintage TEK site. This is by Peter Keller and explains the mesh and its function.

Time to give away another secret: The wire actually is white, with a brown and a red stripe. Guess why? Raymond

BTW, you’re talking about “mesh” this, and “mesh” that... I don’t even know what that is. Could someone please enlighten me? What does it mean?

So I guess this one is a pretty early model then. In my other thread, I was asking about “missing parts”, referring to those that had been obviously scavenged, not to those that had never been

And the wire is the red striped one in Stephens picture that runs in front of the R1431 resistor over to the bundle, and then up to the CRT. I see now what they did, and I was distracted by the