Yoke and tube specs for monitors

[nem]

PFX and PF will have compatible yokes.

 

[dewmansnk]

Well, PFX and PF have near compatible yokes. The horizontal inductance is pretty close between the 2 so no issues there. The vertical inductance on the PF yokes is in the neighborhood of 12-14mH, whereas the PFX is around 7-8mH.

If you put the Tosh PF chassis on the PFX tube, you will likely not get full vertical size. The fix is pretty easy, see my mod thread here:
https://www.arcade-projects.com/threads/toshiba-tri-sync-pbxx-pdxx-pexx-notes-mods.21081/

Check out the 'Vertical Deflection' modification. You will need to change R323 from a ~1.0Ohm down to something around 0.750Ohm and that should give you more current in the vertical deflection and allow for full vertical size.

 

[chriszhxi]

If you put the Tosh PF chassis on the PFX tube, you will likely not get full vertical size.

That's exactly what happened when I put Toshiba PB9929 on it, can't get full vertical size.

About the tube, it has vertical lines besides horizontal scanlines, the whole screen looks like formed by tiny cells or grids.

It has label says made by Samsung China, anyone knows about this tube?

 

[Hedonism Bot 2.0]

AFAIK, the only source for suitable MS9 tube swaps are from other arcade monitors. I haven't found a suitable donor for an MS9 from a consumer TV. And I have done lots and lots of searching.

That tube you have might work for a Blast City however.

Nope. My NNC tubes are beautiful. Plus I have two spares from racing cabs .

I know you can find the tubes from Wangnam racing cabs. Wagnam 1 comes with Sanwa 2931ES monitors. Wangnam 2 comes with Sanwa PFX tubes with Novell tubes.

But yeah, there should be more 27" flat panel 4x3 TV's out there. But no idea what your chances of success are going to be. @Hedonism Bot 2.0 has put some effort into the same endeavor for the NNC without luck.

Yes, the Flat tubes I’ve found have a different depth and they won’t work.

 

[wwse]

Hi. I found 3x Toshiba 100 Hz HD CRT with:
1. PICTURE TUBE, A68LTF356X, 27VPFV2, 104° deflection DEFLECTION YOKE TDY-629SA.
2. PICTURE TUBE, A68LTF356X, 27VPFV2, 106° deflection DEFLECTION YOKE TDY-629SA.
3. PICTURE TUBE, M68LWM356X, 27VPFRACSEMIFINE, 104° deflection, DEFLECTION YOKE, TDY8296A

My friend has Toshiba D29CQ51, PB9929 Chassis with burn-in A68LTF356X:
Сan he swap his crt tube to another from HD CRT? His crt tube has no problems other than burn-in.
Is it necessary to replace yoke?
Crt tube with what deflection to choose? Сan anyone tell me what is the value of the original crt tube?

I also found a lot of HD CRT with A68LZU185X - will they fit?

Thanks

so. my friend bought a TV with PICTURE TUBE, A68LTF356X, 27VPFV2, 104° deflection DEFLECTION YOKE TDY-629SA.

he swapped crt tube and ended up with this - see attachments.

any idea why the image is not full screen?
he connected mister fpga and pc 640x480.

P.S.: sorry for bad quality.

 

[nem]

Horizontal and vertical sizes maxed? You're using the original TV yoke?

 

[wwse]

Horizontal and vertical sizes maxed? You're using the original TV yoke?

So: horizontally this is the maximum setting, vertically - can be stretched to fit the screen, but it was set up to make picture 4x3.
yoke is originally from TV - friend says it's looks very similar to the one on from arcade cabinet tube.

 

[nem]

You would need to measure the yoke. I guess the TV yoke has a higher horizontal impedance than the original PF one.

 

[wwse]

You would need to measure the yoke. I guess the TV yoke has a higher horizontal impedance than the original PF one.

Thanks! he will try to measure the values next weekend.

 

[wwse]

You would need to measure the yoke. I guess the TV yoke has a higher horizontal impedance than the original PF one.

sorry, can you tell me how to measure the impedance. impedance is inductance? I found how to measure resistance in ohm but I don't understand how to measure what you are asking. the first time we encounter this. I'm not exactly sure yet, but the tools on hand will be an ordinary multimeter.

I also found a similar problem (hw) with the replacement of the tube with a solution. do you think it will help us?

Link: http://forum.arcadecontrols.com/index.php?topic=161239.0

 

[nem]

Right, inductance.

You cannot read inductance with a regular meter. You can compare resistance.

As for modifying the chassis, there's likely a resistor you could replace to give you more width.

 

[wwse]

You cannot read inductance with a regular meter. You can compare resistance.

As for modifying the chassis, there's likely a resistor you could replace to give you more width.

Thanks!

 

[nonosto]

how to check the valu about Lh lv rh rv from yoke?

 

[Kidkaos]

Can I use an ms9 chassis on this Hitachi tube?
It's from a Pony Mark IV.
A68KFS60X

 

[JohnRambo'sKnife]

A68MAU085X. It's my understanding that this tube and its yoke should be fully compatible with either a PB1843 and PB9299 chassis.

Can anyone confirm?

 

[daskrabs]

Anyone have yoke readings for Toei TC-A292? I see the L292 readings. I'm sure they're close if not exact, but just wanted to make sure. This is the MV-U4/29 chassis.

 

[nem]

IIRC L292 is way off.

I can check tomorrow.

EDIT: nevermind, they're on the spreadsheet. 0.55mH vs. 0.99mH for horizontal.

 

[kikaso]

Question for the CRT pros;

What is the allowance for impedance on a yoke?

I checked my supposed MS8-29 yoke on a Toshiba A68KJU96X tube (in a NAC) and got numbers that didn’t match the chart in the first post of this thread. I was told that this is an MS8 yoke when I got the cab but it didn’t come with a chassis so wanted to make sure before getting the chassis as I know these cabinets and tubes often have MS9 yokes and chassis. (Pardon the crappy photo angles).

Thanks!

 

[nem]

I think that's indeed a MS8 yoke based on those values.

 

[Mrhide]

Y.FUKUI

giggles.
I think I'm getting tired on this friday afternoon