tube swap candidate? & other tube swap questions...

joemagiera

Thread Manager
Joined
Mar 22, 2003
Messages
6,162
Reaction score
1,073
tube swap candidate? & other tube swap questions...

Will this work for anything (G07, 4900, other)?:

Magnavox TV:
Model: 19C522
Made: May 1986
RF4252 WA04

Tube:
Company: NAP
Model: MV A48AAN01X
on tube itself: 51 19V90

Neck has 9 pins present (not counting key pin)
plus a spacer (non-present) pin on each side of the key pin (so 2 spacers)
plus a 10th key pin

Also, for those that know if it will work, can you explain to us clueless people (i.e.: me), how you know it will work? Can you explain what any of the numbers above mean? About all I can figure is the 19V90 is a 19" tube with a 90 degree deflection (not even sure if that's right).

And if a tube is a candidate, is there anything else to save off the donar TV besides the tube itself? Do you ever need the yoke or rings or neck board or anything else?

Thanks much.
 
Will this work for anything (G07, 4900, other)?:

Magnavox TV:
Model: 19C522
Made: May 1986
RF4252 WA04

Tube:
Company: NAP
Model: MV A48AAN01X
on tube itself: 51 19V90

Neck has 9 pins present (not counting key pin)
plus a spacer (non-present) pin on each side of the key pin (so 2 spacers)
plus a 10th key pin

Also, for those that know if it will work, can you explain to us clueless people (i.e.: me), how you know it will work? Can you explain what any of the numbers above mean? About all I can figure is the 19V90 is a 19" tube with a 90 degree deflection (not even sure if that's right).

And if a tube is a candidate, is there anything else to save off the donar TV besides the tube itself? Do you ever need the yoke or rings or neck board or anything else?

Thanks much.

Yeah, it should work for a G07, 4600 or 4900.

When I'm looking for tubes, I usually check to make sure the tube number starts with A48, and it has 19V90 in raised letters on the tube, and the socket has 10 pins. Sometimes they have 8 or 9 total, but it's the same socket. I think a couple pins aren't used and some manufacturers leave them off. But be careful, because there are some 8-pin tubes out there that won't work. They have thinner necks.

In the tube number, A48AAN01, 48 means 48cm or 19 inches. Sometimes you see A51XXXXX, and they are 20 inches (51cm) but sometimes fit a 19" frame easily. I stay away from the 20 inchers cause I can never get them to converge right.

You are correct about 19V90 meaning 19" tube with 90° deflection angle. MOST tubes (used in our hobby) are 90º, but some like WG 6100 are 100º. I have a 19" tube with 110º deflection angle I got from an old TV, but I can't find a monitor for it. You will get a pincushion or hourglass effect with the wrong deflection angle and it can't be corrected.

I think some people can use the neckboard sockets. Save it and post it for free, 'cause you were just going to throw it out anyway.

In general, in a tube swap, the yoke stays with the chassis, and the rings stay with the tube. You DO NOT want to have to do the convergence, let me tell you it is a bitch. Sometimes you can use the yoke from the donor if the impedence matches the monitor. Using your multimeter set to resistance, check the red & blue, and then the yellow & green on each yoke. If they match very closely, you can swap the tube without taking off the yoke/rings.

Also, discharge that tube every time you handle it, it will keep a residual charge after the initial discharge.

When you're done, put the burnt tube back in the TV case and drop it off at the recycling center :)
 
Back
Top Bottom