20" tube swap - possible?

Vongoosewink

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OK, so I picked up a weird TV/VCR combo unit the other day with what looked to be a really nice tube. Finally had a look inside, hopefully you guys can help me figure out if this is useful for anything.

It has fat neck and what looks like a CR23 socket (9 pins and a ground pin).

I measured the ohms, it reads right about 3 horizontal and 16 vertical.

However, it looks like this is a 20" tube. I have heard that Sanyo EZ20 monitors use 20 inch tubes, is that correct? I had planned on using this for a K7000, but the 20 inch tube probably rules that out. Do you guys think this could be a donor for an EZ20?

I don't actually own an EZ, both my Nintendo monitors are Sharps.

Any thoughts appreciated.
 
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OK, so I picked up a weird TV/VCR combo unit the other day with what looked to be a really nice tube. Finally had a look inside, hopefully you guys can help me figure out if this is useful for anything.

It has fat neck and what looks like a CR23 socket (9 pins and a ground pin).

I measured the ohms, it reads right about 3 horizontal and 16 vertical.

However, it looks like this is a 20" tube. I have heard that Sanyo EZ20 monitors use 20 inch tubes, is that correct? I had planned on using this for a K7000, but the 20 inch tube probably rules that out. Do you guys think this could be a donor for an EZ20?

I don't actually own an EZ, both my Nintendo monitors are Sharps.

Any thoughts appreciated.

what is the number on the tube?
 
Here you go. I haven't seen any that have codes quite like this.

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That's Samsung's own designation:
Your tube is a 21" (54cm) with 20" (51cm) viewable diagonal. It's the same as an A51 tube. Not good for classic arcade monitors.

OK, thanks for the info, that's helpful.

So has anyone actually tried it? Are 20" tubes simply not used because they don't fit standard monitor frames (they don't), or are there incompatibility issues with the actual electronics? Would it be worth hooking this tube up to a K7000 to see what happens? The ohm readings look basically the same. Or are the 20" tubes a proven incompatibility?

I'm wondering, as I have a couple converted games with simple wood-mount monitor housings, where the original frame was removed when an Op swapped it from vertical to horizontal. It would be super simple to mount a 20" tube and chassis directly in the existing hole.
 
I hooked a 10 pin 20 inch to my 19 inch 4600 chassis and it worked fine just had to dial it in. The problem is the frame, plastic shroud, and bezel are for 19. I just did it to see if I could.
 
The Sanyo 20EZ is actually a 19 inch tube. I have a 20 inch tube running on a standard K7000 19 inch chassis, picture fills the screen with no mods to the chassis. It's stuffed in a Blasteroids right now. The measurements on your tube are a little off to work right on a K7000 chassis though.
 
The Sanyo 20EZ is actually a 19 inch tube. I have a 20 inch tube running on a standard K7000 19 inch chassis, picture fills the screen with no mods to the chassis. It's stuffed in a Blasteroids right now. The measurements on your tube are a little off to work right on a K7000 chassis though.

Yeah, the measurements are not exact, the vertical is off a little but it may still work.

Thanks guys, I'll give this a try this weekend!
 
I have performed a tube swap with a 20" tube without any problems. I secured the bottom to the frame with mounting hardware and the top with industrial zip ties. I used a k7000 chassis.
 

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Thanks! Actually that was the first time that tube/tv had ever been turned on. I bought it off craigslist from a lady that won it in a raffle many years ago and never used it. It was stored until I bought it. I have never seen such a great picture. My pic doesn't do it justice. So don't throw yours away.
 
20" tubes can be made to fit depending on the frame and how the chassis mounts. Sometimes you need to fiddle a little with the chassis so it clears the tube. Sometimes you may need to file the mounting ears on the tube out so they will fit in the chassis. Why not try? If it doesn't work, then ditch it.
 
I hooked a 10 pin 20 inch to my 19 inch 4600 chassis and it worked fine just had to dial it in. The problem is the frame, plastic shroud, and bezel are for 19. I just did it to see if I could.

yeah same here,, works good.. doesnt fit.
 
I have performed a tube swap with a 20" tube without any problems. I secured the bottom to the frame with mounting hardware and the top with industrial zip ties. I used a k7000 chassis.

I've done exactly the same on 2 tube swaps using g07's. Fills the screen perfectly, just didn't fit the frame.
 
Then make a new frame. Not that hard, 2 pieces of 1 1/2" angle iron Thin as you can find 1/8" is fine. then grab some 1" flat stock to bend to make the back of it.
You may have to get "creative" so it fits the cab properly as it is a larger tube but....

I have resorted to doing that for some of the 25" monitors I have built. No way am I going to pay someone 50.00 plus shipping for a couple straps of metal, that you can buy for 15.00 tops.

And if you have a sheet metal shop handy and a Chassis base as a template you can have them build as many as you want for next to nothing. Or use a piece of flat Sheet metal and use some PCB standoffs to hold the chassis.

Just takes time and a willingness to do what needs to be done.
And I don't want to hear OH that's not original to the cab.... If your trying to stuff a 20" tube in it your not worried about having the correct frame.
 
YES! Where there is a will there is a way

Then make a new frame. Not that hard, 2 pieces of 1 1/2" angle iron Thin as you can find 1/8" is fine. then grab some 1" flat stock to bend to make the back of it.
You may have to get "creative" so it fits the cab properly as it is a larger tube but....

I have resorted to doing that for some of the 25" monitors I have built. No way am I going to pay someone 50.00 plus shipping for a couple straps of metal, that you can buy for 15.00 tops.

And if you have a sheet metal shop handy and a Chassis base as a template you can have them build as many as you want for next to nothing. Or use a piece of flat Sheet metal and use some PCB standoffs to hold the chassis.

Just takes time and a willingness to do what needs to be done.
And I don't want to hear OH that's not original to the cab.... If your trying to stuff a 20" tube in it your not worried about having the correct frame.
 
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