Zenith A1512J restoration

[bandersen]

I finally got my hands on the rest of the set. The CRT turned out to be a headscratcher.

It's been rebuilt and the label indicated 14R/XP4. The 14RP4 is 600mA while the XP4 is 450mA so how could this CRT sub for both ?


I hooked it up to a CRT tester and it does draw 600mA which made me wonder how well it would work in this 450mA series set. Only one way to find out.

So it does work, but I have the brightness control nearly maxed out.


Now for a bigger issue. Serious lack of width. It's only about 50%. The schematic showing something called a "width sleeve" but gives no indication how to adjust it.


This is the first time I've encountered one of these. I assume it's this grounded ring around the neck Moving it around has little if any effect.

Any ideas ?