[Posibly OT?] Tek 321A scope needs help....

[Tony Duell]

> 
> Hello all,
> 
> I recently became the new owner of a Tek 321A scope, but it needs some 
> repairs.  Also, I have no manuals, so if anyone could loan me an operator's 
> manual or service manual so I could make a copy, I'd appreciate it....
> 
> The main issue is the display.  There is what I can only describe as a 
> "cloud" that runs vertically along the center of the display.  Varying the 
> intensity and focus does vary this cloud, but it is still present.  Also, 
> the trace line is visible, but very out of focus.  Wider at the edges, and 
> narrower in the middle.  I can take a picture if this makes no sense...

Well, it _could_ be the CRT (displaced electrodes or interelectrode 
shorts) :-(, but I'd start by checking CRT electrode voltages. On some 
Teks there are various geometery/sheild electrodes, and it may be that 
you've lost the voltage on one of them.

-tony