The Very Definition of "Screwed"

[FrizzleFried]

I think it speaks for itself.   The only difference between the tests of the two Amplifone tubes is that the 25" tube's picture was taken with the screen pot turned all the way down and the 19" Amplifone tube's picture was taken with the screen pot turned up a bit as all the way down was black (as it's supposed to be).

Can anyone give me any hope that the 25" tube is fixable or should I just come to grips with the reality that I am screwed,  pull the damn 25" tube and mount the 19" in the cockpit?

I sure as hell can't spend the $400+ it would take for a new tube (if one ever was found!).

Opinions?

[qrz]

vector display and didn't use the 19" yoke  ?? 

crt pin outs/ bias voltages different ......

just a geuss, with limited info provided

qrz

[MonMotha]

Given that you say the 25" picture was with the screen control all the way down, it looks like (assuming that is a proper CRT and yoke for the vector chassis) that CRT may have some sort of internal short - perhaps a green H-K?  I'm far from a CRT expert, though.

[northerngames]

are you using the same chassis to run both tubes?

[FrizzleFried]

are you using the same chassis to run both tubes?

Same chassis.  Pictures taken 5 minutes apart.  Only thing different between the two shots is the tube (and attached yoke).  The general consensus I've gotten from folks is the green is shorted to the heater.   I'm trying to locate a local rejuvinator to use...the a local guy who let me use his once isn't responding to my emails thus far.

Grrrr...

[ChadTower]

Frizz, any decent tv repair shop will have one.  If you were closer I'd let you use mine.

[SirPeale]

Frizz, any decent tv repair shop will have one.  If you were closer I'd let you use mine.

The TV shop in my town doesn't have one any more.  Apparently there just isn't much call to use them these days.  He said his broke about seven years ago and he packed it away somewhere.

Which was really disappointing to me because I have a 25K7181 that needs the guns cleaned (Zenith tube, really dim). 

And of course I know no one with a rejuvenator within 50 miles.

[ChadTower]

The TV shop in my town doesn't have one any more. 

Might not qualify as a decent shop anymore, then. 

Next time you head up here load it up... we'll slap it on mine.  If I don't have the adaptor a friend of mine that isn't too far away probably does.  And if neither of us does I guarantee you Layman does.

[Ummon]

Recently, I saw what appeared to be a perhaps older but excellent-condition one go on ebay for I think twenty bucks. Definitely under $50.

[Kevin Mullins]

If you disconnect the video input completely from the monitor does it still look greenish ?
(might have to turn the SCREEN back up a bit to see)

Question someone else may be able to clarify-
Can't you use any A63 100 degree tube if all else fails?
(like doing a tube swap from a television set)

[FrizzleFried]

The local guy with the rejuvinator emailed me.  I will be picking it up tomorrow.  If it works,  great!  If it don't...that sucks,  but a 19" Amp is better than a 19" WG6100...

[MonMotha]

Even without a rejunvinator, you can check for shorts.  Just yank everything (of course discharge the anode!) and use a multimeter on the pins.  Combined with a pinout, you can see any shorts (use continuity/resistance test).  Note that some paths will normally be low-Z and may not indicate a fault.