FREE - Game: CRT Tubes - may be junk, may be useful

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I have started the daunting task of rounding up free 19" and 20" CRT TV's off of craigslist in my area, to replace my DK sanyo 20EZ tube. I know it's a crap shoot and could turn into a long drawn out process, but hey, patience is what this hobby is about right?

As I am picking up TV's and determining they won't work, I will post up a picture of the yoke, a picture of the tube and the resistance measurements, in the hope that I will have found something that someone else will need.

If you come across one that I've posted and can say definitively "hey, that tube is a perfect swap for game x", then please chime in.

Alternatively, if you look at it, and can say "that tube will never work for any game ever", then that would also be helpful information.

I will be purging TV's as local free electronics recycling events come around (which seems to be pretty often), or re-craigslisting them.
 
:edit: This TV was picked up by a fellow KLOV'er and is no longer available.

Here is the first TV I've picked up.
20" magnavox
vertical resistance: 4.1ohms
horizontal resistance: 14.6ohms
Picture looks good, as far as I can tell with a PS1 hooked up via RF. Colors all seem right on.
 
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The first one you posted is a 19" a48 is 19". Its also a match for a k7000 chassis.... yoke should probably work too.

I would avoid RCA black plastic tv's 95'-05'..... the neck matches a 20ez, but the G1 voltage is wrong and you wont get the blacks black enough. Definitely shoot for all 80's models.... wood grain or black plastic. That's your best shot.
 
The first one you posted is a 19" a48 is 19". Its also a match for a k7000 chassis.... yoke should probably work too.

I would avoid RCA black plastic tv's 95'-05'..... the neck matches a 20ez, but the G1 voltage is wrong and you wont get the blacks black enough. Definitely shoot for all 80's models.... wood grain or black plastic. That's your best shot.

Thanks mate, good info.

Well, if anyone in the San Diego area would find this TV useful, for the tube, PM me. It's yours if you want it.
 
It will be hard to find a tube to swap with the Sanyo 20EZ, measurements are very close to a G07 on that tube and those are nearly impossible to find also. Also, it's a 19 inch tube, not a 20 inch on the Sanyo.
 
It will be hard to find a tube to swap with the Sanyo 20EZ, measurements are very close to a G07 on that tube and those are nearly impossible to find also. Also, it's a 19 inch tube, not a 20 inch on the Sanyo.
I've read that 19" and 20" are basically the same, with regard to finding a TV donor. Is that not true?
 
They are not the same, 20 inch is obviously a little bigger. I have seen a few 20 inch tubes squeezed into 19 inch frames but it was never real pretty. Bezels have to be cut to fit, cabs need to be slightly modded to fit the larger screen, etc. Last one I saw was in a Blasteroids. Nintendo frames are pretty rigid so I doubt one could easily be fit into that frame. Most of the 20 inch tubes will run fine on a regular K7000 chassis.
 
Ok, good to know, thanks. It seems most people that advertise 20" TV's on craigslist are actually giving away a 19" TV (like the one above).
 
Sometimes the model numbers on the TV's show they are a 20 inch but they have a 19 inch tube and vice-versa. I've been fooled a few times. Almost forgot, the 20 inch tubes seem to have a different curvature to them, they almost seem flatter than the 19's. Thats what made fitting the original plastic bezels so hard.
 
Sometimes the model numbers on the TV's show they are a 20 inch but they have a 19 inch tube and vice-versa. I've been fooled a few times. Almost forgot, the 20 inch tubes seem to have a different curvature to them, they almost seem flatter than the 19's. Thats what made fitting the original plastic bezels so hard.

Ok, well looks like I'm back where I started. :p Probably have to pick up a potential candidate, open it up to see what's inside, then go from there. And if it won't work for my needs, then post up the pertinent info and hopefully someone will find it useful.
 
Don't get discouraged..... they are out there for sure..... but yes you will find alot that are going to be k7000 matches over anything else.

I just picked one up last week thats a match for 20ez/4900 with a yoke swap. I rarely look
For tv's...... so if your actively looking you have a good shot. Just be patient. Also see if you have a local recycling place..... ive heard of some people being able to swap out tvs some times..... take in 5 and walk back out with 5. I asked locally by me and they said I couldn't touch the tv's once they had them. But results may differ.
 
Don't get discouraged..... they are out there for sure..... but yes you will find alot that are going to be k7000 matches over anything else.

I just picked one up last week thats a match for 20ez/4900 with a yoke swap. I rarely look
For tv's...... so if your actively looking you have a good shot. Just be patient. Also see if you have a local recycling place..... ive heard of some people being able to swap out tvs some times..... take in 5 and walk back out with 5. I asked locally by me and they said I couldn't touch the tv's once they had them. But results may differ.

What would constitute a match for a yoke swap? Simply fitting in the frame 20ez frame? Or are there other electrical/electronic specs that the tube also needs to meet?

I ask cuz there's a local guy who is supposed to be amazing with TV repairs (according to yelp), and if it's a matter of simply finding a tube that physically fits, I will reach out to him to see if he can do a yoke swap.
 
Typically you use the yoke off the old tube you are replacing. Any decent tv repair shop should have no problem swapping the yoke and doing the convergence. Your biggest concern is just finding a tube with the correct neck socket. The chances of it having a matching yoke are extremely slim.
 
@joe3693 - I want to be sure I'm understanding it correctly. I am currently looking for a TV that has a yoke matching the sanyo 20 ez (CR-23), and vertical and horizontal resistance matching the sanyo 20ez, and fits in the sanyo 20 ez frame. This would be an ideal candidate, which would swap in place of the current tube, and the neck board should plug right in. However, a yoke swap would circumvent the need for this, in which case, a tube that physically fits in the 20ez frame would be swapped into the 20ez yoke. Do I have that correct? Than you also for the link to the "tube info generator.

@arcadenut - thank you, I just finished reading through that. Very good info, but unfortunately the "yoke swap" section is still coming soon. I think that's where a gap in my current understanding could be closed a little better.

Thanks for all for helping me out of my noobish state in this area, with possibly an extremely lofty goal. :)
 
The CR-23 is the neck type. Where the neck board plugs in.
The first tv you posted as a CR-31 which is not a match.
Once you have a tube that is a CR-23 with the matching 6.3v heater and 50v G1, which is the information you will find from the tube number look up link, then I would worry about yoke reading and them matchin after that.
The CR-23/6.3v/50v is the only part to be concerned about right now.
 
The CR-23 is the neck type. Where the neck board plugs in.
The first tv you posted as a CR-31 which is not a match.
Once you have a tube that is a CR-23 with the matching 6.3v heater and 50v G1, which is the information you will find from the tube number look up link, then I would worry about yoke reading and them matchin after that.
The CR-23/6.3v/50v is the only part to be concerned about right now.

What is the yoke reading?
 
Run it by Ian (ieure on here), tubular is his site and he's something of a monitor wizard. Well versed in swaps.
 
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