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Yoke and tube specs for monitors

Lots of controversy around these next measurements at the moment. I'm posting them anyway :thumbsup: :

19" Wells-Gardner K7000

Tube: Phillips A48ABK05X
Neck: EDIT: B8-294 ???? Help here with this @nem. It's 8-pin.
Chassis: K7000 (P447)

Yoke:
LhLvRhRv
1.5930.92.412.7
 

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nem said:
@acblunden2

Argh, it's my nemesis. It's the socket that I can't find a compatible tube for!

B8-294
Click to expand...
I have several spares. Ship you one or two if you are in a pinch.

And here is the controversial monitor's fraternal twin. The prettier one (better image) that has lots of issues (flybacks can't be found anywhere):

19" Zenith K7000

Tube: Unknown/Faded Away
Neck: EDIT: B10-277 ???? 10-pin (more help here @nem)
Chassis: K7000

LhLvRhRv
1.7413.92.26.1
 

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Isn't the Zenith neck just your regular B10-277 that's seemingly on every JPN monitor?

Thanks for the offer, but I'm pretty sure no tube would ever survive the cross over the Atlantic. However, if someone has a spare K7000 neckboard (P448?) that attaches to the Zenith, I'm definitely interested!
 
Think so. Looks the same. I don't know too much about necks. Screwed to a wood frame and packed well, a 19" tube should survive the Atlantic. But it would probably cost hundreds to ship from West Coast, to East Coast, across Atlantic, then into Finland. Too much to risk.

Might have a spare neck off a Zenith K7000 25". If I find it, it is yours. Can't fix it anyway, no FBT.
 
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nem said:
Toshiba PF D29C051 (from Sega New Net City)

Tube: Beijing-Matsushita A68LZU185X
Neck: B10-277
Chassis: PD2367
Yoke:
LhLvRhRv
0.29 mH11.9 mH0.8 ohm8.2 ohm

Toshiba PF D29C051 (from Sega New Net City)
Tube: Toshiba A68LTF356X
Neck: B10-277
Chassis: PD1843
Yoke:
LhLvRhRv
0.30 mH14.8 mH0.9 ohm8.2 ohm
Click to expand...
I've got a PD1843 chassis in my New Net City Toshiba PF and I'm currently looking at buying a spare in case this one ever dies on me.

I found somebody willing to sell me a PD2367 chassis. It looks like most of the numbers here match, but it seems the vertical impedance is off by about 20%. Would it be risky to use this chassis on my NNC?
 
Generally vertical presents very little risk through mismatch. I would just give it a try. The worst is that you replace the common, off the shelf vertical IC, but it would be a big surprise if anything bad happened to it.
 
Yeah, I'm sure it will be fine. I've swapped PF chassis between monitors without ever measuring the yoke, I've never had any issues.
 
nem said:
Yeah, I'm sure it will be fine. I've swapped PF chassis between monitors without ever measuring the yoke, I've never had any issues.
Click to expand...
Is there anything else I should worry about when swapping in a chassis that was originally not paired with my tube?

For instance, on the arcade-otaku wiki it mentions that there's a different value capacitor on the neck board depending on whether it was installed with a Toshiba or Matsushita tube

https://wiki.arcadeotaku.com/w/Toshiba_PF_D29C051
 
Nothing to worry about in advance. Plug it in and see what it looks like.

The cap being different is news to me.
 
I can confirm i have two working 73SX707Y22-DC26 tubes attached to sanwa 29E31 chassis.
Surprisingly, the 29E31S manual from here http://the.nerv.free.fr/docpro/29E31S.pdf states the tube is 73SX701Y22-DC23 which according to your tables should have different specs than both: YS 73SX701Y22-DC22 and YS 73SX707Y22-DC01

Tho i dont have the instrument to measure inductance so I cant confirm values of the two tubes
Also the -DCXX has a role apparently
 
Hatsune Mike said:
I put together a spreadsheet: https://docs.google.com/spreadsheets/d/1gD6laah_JWWT1RZaLfXfDIVsc5_aj74PPxQCatNl6X8/edit#gid=0
Click to expand...

Looking at your spreasheet I can see your readings on a MS-2932 yoke paired with Blast tube (A68KSM696X).
However, I recently adquired a spare A68KJU096X tube paired with the same 31Khz only MS-2932-S chassis:
yoke1.jpg
yoke3.jpg


Some european Naomi universal cabinets use this monitor setup.

Taking a look at the yoke, it is externally similar as a spare MS9-29 yoke I already have:
yoke2.jpg

Then, to ensure if it is the same yoke, my readings of each one are:
ChassisLhLvRhRv
MS-29320.200 mH14.7 mH0.9 Ohm7 Ohm
MS9-290.320 mH14.3 mH1 Ohm6.9 Ohm

Readings are almost the same, except for Lh.

Indeed, looking at the list posted by @'Digital System Design' in Page 2, readings of inductance matches with mines:
Toshiba curved SF A68KJU96X0AF18002A10.20514.66

Label of the yoke also matches with DY designation in that list:
yoke1.png


My question: Is that 0,100 mH difference in horizontal inductance enough to have problems if I use a MS9-29 chassis on it?
or, Do I need to make a yoke swap to ensure it will work propertly with MS9-29?
 
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Nebula said:
My question: Is that 0,100 mH difference in horizontal inductance enough to have problems if I use a MS9-29 chassis on it?
or, Do I need to make a yoke swap to ensure it will work propertly with MS9-29?
Click to expand...
Yes, you will have problems. Yes, you will have to swap yokes.
 
Boys. I have some questions. Have a consumer toshiba tv here. Tube is A68KLF96X02
On the yoke it says
TY-29KC4A
A 4A0(or8)6A
Would like to pair it with a nanao ms9 chassis.
What and how exactly do I have to measure the yoke of this tube?

Thanks
 
hardyhell said:
Boys. I have some questions. Have a consumer toshiba tv here. Tube is A68KLF96X02
On the yoke it says
TY-29KC4A
A 4A0(or8)6A
Would like to pair it with a nanao ms9 chassis.
What and how exactly do I have to measure the yoke of this tube?

Thanks
Click to expand...

You mainly need to read the inductance of both coils in the yoke, vertical and horizontal, and check if measurements are in “range” of the proper ones for MS9
 
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