tv tubes

[alienware32]

are orion tubes any good to use as arcade monitor i have a 25 inch zenith tube that came from a well monitor but the picture is fuzzy and my we ya chassis is new

[qrz]

if it fits , USE it .
the mounting tabs may be reversed,  thus requiring spacers .
pin out should be the same

qrz

[alienware32]

i used the orion tube out of a 27 inch tv that was going bad it is a perfect match it eliminate the blooming problem i was experiencing zenith tubes are crap

[Zebidee]

Did I hear someone say 'yoke impedance'?

You should measure the new tube's yoke impedance  with an ohmmeter first, and try to use a tube that has similar yoke impedances to the original tube's yoke.  Unless are swapping yokes as well?

If you are comfortable about swapping yokes, then I'm sure that I won't have to mention 'convergence' ...

Anyway, it seems that you have been lucky enough that the replacement tube actually works.

Fuzzy picture is usually a symptom of poor convergence and/or or a yoke that isn't spaced properly (ie, the triangular rubber feet near the back of the tube).  Actually, the two things are related. 

Many sensible people avoid convergence adjustments as fiddling with it is very time-consuming, frustrating and not necessarily fruitful.  I wish you good luck and a cool hand if you choose that path.

Sooo, having said all of that, if the tube looks like sh1t on your new chassis then I suggest that you try a different tube.  Zenith tubes are indeed often crap, but Orion tubes aren't necessarily a great improvement.

[alienware32]

the last tube out of the orion tv is a perfect match the picture is perfect

[Zebidee]

The convergence can be wildly different between different tubes.

[alienware32]

your right but i think orion tubes are a good match

[Zebidee]

Yeah, seems to be the case.  Looks like you'll have to toy with the yoke position and maybe the three (or maybe four) convergence rings.  Not for the faint hearted - do some research on CRT convergence theory before you try this.

You might find it easier to find another tube that matches rather than spending many hours attempting to get the convergence 95% right.  It depends upon how much time you have and your tolerance for frustration I think.

[Ummon]

Yeah, this can be frustrating. I did this without a mirror and it's pretty decent, but it took me a couple/few tries and a couple hours I think. I had NO idea what ring did what, though. I just eye-balled it.