Yoke and tube specs for monitors

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    • Yoke and tube specs for monitors

      Let's start one of these as there seems to be interest in one. Hopefully everyone will contribute so we'll get a comprehensive list at some point.

      For measuring the yoke, the tool that I use is the BSIDE ESR02 PRO. It seems accurate enough.

      BSIDE ESR02 PRO- cheap tool recommendation

      It's a really nice for this job, because it shows both resistance and inductance at the same time and keeps the values on the screen fixed for 15 seconds, which is enough time to jot them down or to snap a pic.

      You can pick one up for around 20 USD. Remember to get meter leads for it.

      ---

      Some specs can already be found here:

      wiki.arcadeotaku.com/w/Yoke_Specifications

      However, I would like to see additional info added to these.

      ---

      The list will follow this format:

      Monitor name (usually on a sticker on the frame somewhere)
      Tube brand and model (sticker on the tube)
      CRT base / neck connector (see here)
      Chassis model (found on the PCB somewhere)
      Yoke specs:
      LhLvRhRv
      for horizontal inductance in mHfor vertical inductance in mHfor horizontal resistance in ohmfor vertical resistance in ohm



      ---


      Hitachi GMK-29 (from Jaleco Pony IV)
      Tube:
      Neck: B10-277
      Chassis: GMK-29
      Yoke:
      LhLvRhRv
      0.25 mH19.0 mH----



      Hitachi GMK-29FS2 (from SNK Neo 29)
      Tube: A68KSA30X
      Neck: B10-277
      Chassis: GML MAIN P.W.B (?)
      Yoke:
      LhLvRhRv
      0.36 mH19.0 mH0.8 ohm7.9 ohm



      Nanao MS8-29 (from Sega Astro City)
      Tube: Toshiba A68KJU96X
      Neck: B10-277
      Chassis: MS8-29
      Yoke:
      LhLvRhRv
      0.39 mH17.5 mH----



      Nanao MS9-29 (from Sega New Astro City, Taito Egret II, + others)
      Tube: Toshiba A68KJU96X
      Neck: B10-277
      Chassis: MS9-29
      Yoke:
      LhLvRhRv
      0.33 mH14.0 mH----



      Nanao MS-2930 (from Sega Blast City)
      Tube: Toshiba A68KSM696X
      Neck: B10-277
      Chassis: MS-2930
      Yoke:
      LhLvRhRv
      0.20 mH16.0 mH----



      Nanao MS-2932 (from Sega Naomi Universal)
      Tube: Toshiba A68K**696X
      Neck: B10-277
      Chassis: MS-2932
      Yoke:
      LhLvRhRv
      0.20 mH16.3 mH----



      Nanao MS-2933 (from Sega Blast City, Sega New Net City)
      Tube: Toshiba A68KSM696X
      Neck: B10-277
      Chassis: 05B20196E1
      Yoke:
      LhLvRhRv
      0.19 mH15.1 mH0.5 ohm6.8 ohm



      Sanwa 29e31s (from Sega Naomi Universal)
      Tube:
      Neck: B10-277
      Chassis: 29e31s
      Yoke:
      LhLvRhRv
      0.31 mH11.8 mH----



      Sanwa PFX (from Sega New Net City)
      Tube: Beijing-Matsushita A68MAU085X90
      Neck: B10-277
      Chassis: SXD60910A
      Yoke:
      LhLvRhRv
      0.28 mH10.1 mH0.8 ohm7.6 ohm



      Sanwa PFX (from Sega New Net City)
      Tube: Toshiba A68LTF356X
      Neck: B10-277
      Chassis: KW0606A
      Yoke:
      LhLvRhRv
      0.28 mH7.47 mH0.7 ohm6.1 ohm



      Toei TC-L292
      Tube:
      Neck: B10-277 (?)
      Chassis: TC-L292
      Yoke:
      LhLvRhRv
      0.98 mH20.0 mH----



      Toshiba D29CR55
      Tube: Toshiba A68KJU96X
      Neck: B10-277
      Chassis: D29CR55
      Yoke:
      LhLvRhRv
      0.34 mH14.4 mH----



      Toshiba PB7574-1 (from Konami Windy II)
      Tube: Toshiba A68KZN696X
      Neck: B10-277
      Chassis: PB7574-1
      Yoke:
      LhLvRhRv
      0.22 mH10.6 mH0.6 ohm5.9 ohm



      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



      Toshiba PF D29C051 (from Sega New Net City)
      Tube: Toshiba A68LTF356X
      Neck: B10-277
      Chassis: PB9929
      Yoke:
      LhLvRhRv
      0.30 mH15.2 mH0.9 ohm8.3 ohm



      Wells-Gardner K7000 25"
      Tube: Label absent/unreadable
      Neck: B10-277
      Chassis: K7000
      Yoke:
      LhLvRhRv
      1.48 mH22.0 mH----



      Wells-Gardner D9200 29"
      Tube:
      Neck: B10-277
      Chassis: D9200
      Yoke:
      LhLvRhRv
      0.248 mH5.89 mH----

      The post was edited 3 times, last by nem ().

    • So I have three "100% working" Toshiba PF's (PD1843's) coming from yaton. Will test them on NNC's that already have Toshiba PF's when they get here to validate "100% working" status. Then will install them on my Sanwa PFX-based NNC's to confirm compatibility. If I would have known this sooner, would not have spent any effort trying to assemble Martin Jones's Sync Pulse generator.

      Also have one of those meters on the way.
    • I took a bunch of measurements a while back. I did not bother with DC resistance, only impedance.

      Nanao MS9 (Sega New Astro City, Taito Egret II, many others)

      Tube: Toshiba A68KJU96X
      Neck: B10-277
      Chassis: MS9-29

      Yoke:

      LhLvRhRv
      0.33 mH14.0mH----




      I've measured another with 14.6mH on the vertical.

      Nanao MS8-29

      Tube: Toshiba A68KJU96X
      Neck: B10-277
      Chassis: MS8-29 what a piece of shit


      Yoke:

      LhLvRhRv
      0.39 mH17.5mH----





      Toshiba Perfect Flat (New Net City)

      Tube: A68LTF356X
      Neck: B10-277
      Chassis: Toshiba PF

      Yoke:

      LhLvRhRv
      0.30 mH11.0mH----





      Toshiba D29CR55

      Tube: Toshiba A68KJU96X
      Neck: B10-277
      Chassis: Toshiba D29CR55

      Yoke:

      LhLvRhRv
      0.34 mH14.4mH----





      Sanwa E31s

      Tube:
      Neck: B10-277
      Chassis: Sanwa E31s

      Yoke:

      LhLvRhRv
      0.31 mH11.8mH----





      Nanao MS-2930

      Tube: Toshiba A68KSM696X
      Neck: B10-277
      Chassis: Nanao MS-2930

      Yoke:

      LhLvRhRv
      0.20 mH16.0mH----





      Hitachi GMK 29 (Pony Mk IV)

      Tube:
      Neck: B10-277
      Chassis: Hitachi GMK 29

      Yoke:

      LhLvRhRv
      0.25 mH19.0mH----





      Toei TC-L292

      Tube:
      Neck: B10-277?
      Chassis: Toei TC-L292

      Yoke:

      LhLvRhRv
      0.98 mH20.0mH----




      Rodotron 666A

      Tube:
      Neck:
      Chassis: Rodotron 666A

      Yoke:

      LhLvRhRv
      0.30 mH8.2mH----





      Unknown Korean Samsung Monitor (GuitarFreaks)

      Tube: Some Samsung
      Neck:
      Chassis:

      Yoke:

      LhLvRhRv
      0.87 mH18.2mH----




      25" Wells-Gardner K7000

      Tube: Label absent/unreadable
      Neck: B10-277
      Chassis: K7000

      Yoke:

      LhLvRhRv
      1.48 mH22.0mH----




      Sony KV-27V42 Television

      Tube: Some Sony Trinitron
      Neck:
      Chassis: KV-27V42


      Yoke:

      LhLvRhRv
      1.21 mH22.6mH----





      Nanao MS-2932

      Tube: Toshiba A68K**696X (Blast tube)
      Neck: B10-277
      Chassis: MS-2932


      Yoke:


      LhLvRhRv
      0.20mH16.3mH----



      Wells-Gardner D9200

      Tube:
      Neck: B10-277
      Chassis: D9200


      Yoke:

      LhLvRhRv
      0.248mH5.89mH----

      The post was edited 2 times, last by Hatsune Mike ().

    • I am looking at picking up a New Net City cab with some slight burn-in. The chassis is unknown because I don't yet have it in my possession, but I see that the following four tubes are used across all the NNC cabs listed here:

      Toshiba A68KSM696X
      Toshiba A68LTF356X
      Beijing-Matsushita A68MAU085X90
      Beijing-Matsushita A68LZU185X


      Unless one of these was a Net City or Naomi Universal "converted" into NNC and not labeled properly (the A68KSM696X was a Nanao MS-2933 so I'm suspicious), I presume the NNC bezel will fit any of these tubes, correct?

      All of these would have the same dimensions and the same neck pinout (B10-277 board), so would it be safe to say that any of these A68*** monitors is suitable for a tube-swap so long as I keep the yoke, neck-board, and chassis that came with the NNC?

      From my limited research into tube-swapping that seems to be all that is needed, but all the videos and explanations I've seen were dealing with 15khz monitors only.

      Does a tri-sync monitor have anything special within the tube itself that requires additional consideration here? Or is the difference between a 15khz and 31khz display merely in the yoke and the chassis that drives it?

      Lastly, are there any known Toshiba PF consumer sets with tubes that would be a suitable replacement in a NNC?

      I see there are still a few sources where one can buy a "A68LZU185X" tube, though curiously it appears to be branded as Phillips . Is this common for different manufacturers to use the exact same model number like this, and would I need to worry about differences in mounting brackets, etc?

      Sorry for the barrage of questions
    • I hope most chassis will have some self protection, but that's my rough rule of thumb. It's worth a shot if the specs aren't totally out of wack.

      I've had some situations where it seems like it should be perfect, and yet still something is off. One example is that the Toshiba chassis from the New Net City won't be able to properly focus an MS8/MS9-29 tube. Maxed out, the focus is just okay. It needs a higher focus voltage, and that's not something that can be trivially changed.