Insufficient width....

[nasadowsk]

And no, not in THAT way!! It's that Zenith I picked up.

Here's what's going on:

* I popped in the new 6LF6 I got, and set the efficiency.
* The set was fine, but the HV was insane - 25-27kv!
* Fixed that - the tube retainer spring accidently got hooked on a horz tube lead that traced back to the HV adjuster pot. So, it was like the POT was pegged at max. No biggie.
* But, I've still got foldover at the right side. And I need to be about 1/4" to 1/3" wider. I think these two issues are related. Swapping the 6U10 helped a little bit.

I don't know where to look here - I'm guessing the two issues are related. one suspect is the .0015 black timebomb cap in the circuit. Or maybe an electrolytic near there. And the cap on the horz hold control.

Does anyone have a copy of the schematic for this set they can scan in or send me? I want to get this sorted out because then I can get this set 100%

Oh yeah - how the heck do I center the picture? There's no centering strings on the yoke, or centering controls on the chassis that i can find.

Thanks guys!!!

[drh4683]

Check your horiz. out tube (hot) first. Many times NOS tubes can be gassy. If the old hot worked better as far as picture width goes, the hot is the fault.

[nasadowsk]

I swapped HO tubes around until I was totally sick of that silly spring thing on top of the tube. Didn't help.

I purified and converged the set, and put it back. I think I've got a real issue in there - I'll probbably end up putting in new lytics and a few new caps before I'm done. I'm thinking there's either a bad cap or the power supply is just a bit tired. I just can't that foldover out...

I can't get the purity perfect on the set - though I think that might be the CRT, I swear that if the set runs a few hours, after I turn it off, you hear *twang!* every now and then for awhile afterward. I'm almost certain it's the mask doing bad things.

What's the availability of a 15LP22 like, anyway?

I also need to get on the roof and fix the antenna again.

[drh4683]

forgot to mention, check your 6CE3 damper! The damper is a very probable cause of width problems and or foldover.
The damper tube may test ok, however it may be gassy unless your tester can test for grid emission. Change it anyway to be absolutly certian.

[nasadowsk]

The damper's origional to the set! Like the HO tube and practically every other tube was.

I can imagine the poor thing's a bit tired, too.

[andy]

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