[Lowfer] O-scope Bad

Fri, 9 Jan 2004 11:20:26 -0500

Peter:

Your scope *may* be broken but I doubt it. Several times in my career I have
had scopes that I though were broken but were really fine. The fact that the
"dim glow changes with focus" indicates it is generating an electron beam.
And it is doubtful that both deflection systems broke at the same time. If
one did then we would expect to see a horizontal or vertical line or a spot.

So, in summary, I suspect that the spot is off-screen. Perhaps one of the
horizontal or vertical adjustment controls or tubes is dirty/broken so the
beam is sweeping but on the edge of the tube.

Some Tek scopes have a button called "spot finder" or something like that.
If you push it you should see the spot somewhere on the screen.

Mike
wm1ke

> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Peter Barick
> Sent: Friday, January 09, 2004 11:02 AM
> To: [email protected]
> Subject: [Lowfer] O-scope Bad
>
>
>
> Anyone provide some direction ?
>
> Just got an o-scope off ebay and the only thing that lights up is the
> pilot light. The tube has a dim glow that changes w/ Focus, the PS has
> voltage, the Cal port works, but no trace.
>
> Seems there's no recourse on the deal but what about repairing the
> scope? Anyone w/ experience here ... worth having a NON high-end scope
> sent in for repair -- and where to send? (Oh, Bill, this was the scope
> that filled in for the Tek 465 scope I didn't bid high enuf on.)
>
> The Web showed some tech repair services w/ Chinese script and another
> in San Fran. Shipping could be a limiting factor too. What to do?
>
> Not kidding, but the urge to tap ebay one more time is building <GG>
>
> Peter
> _______________________________________________
> From the Lowfer mailing list
> Send messages to: [email protected]
> To sub/unsub visit: http://mailman.qth.net/mailman/listinfo/lowfer