Building NNC Without a Cab

Slypty

Student
Joined
Sep 7, 2023
Messages
63
Reaction score
8
Location
Toronto
As the title says, I don't play on importing a Cabinet for my NNC Build, instead I'm just relying on the following things:

- KW0606A Sanwa Chassis (on the way from Japan)
- A Yoke I just bought from Yaton, that is for the NNC Toshiba PF Tube
- And either my A68KZN969X Tube from my Grundig CRT (Blast City Tube).. this Tube can be used with the NNC Chassis, but b/c it's curved I understand it might not be worth the effort, as making the adjustments to the tube will probably be difficult.

The Yoke from Yaton arrived, can anyone confirm it's for NNC?
I've discovered the tube from a local Facebook Ad (Toshiba Blackstripe) has a tube that has the same neck pin out, and is considered a Flat Tube even though it's late 80's.
The only mild difference is the size is a 66cm vs 68cm of the NNC, and the anode voltage is 7000V vs. 9000V from the Blast KZN Tube.

I'm thinking about building the Sanwa Chassis into this CRT using the older Toshiba Flat Tube, I have an Isolation Transformer and of course the Yoke now. I'd probably paint it in a NNC Style and just enjoy it as it is. I don't really have room for a full Cab at the moment, so enjoying a multisync CRT would be a fun project until I can make room in the future.
All in all, I"m hoping that I'm not overlooking some basic functionality of the Chassis, for instance are the adjustments done on a separate board that I need to purchase, or is most of that on the chassis already?

Yaton Yoke left, CRT BlackStripe with Flat Tube Right. Sure the Tube isn't totally flat, but it's considered a lot flatter than most curved tubes.
 

Attachments

  • Screenshot 2026-07-01 7.08.17 PM.png
    Screenshot 2026-07-01 7.08.17 PM.png
    833 KB · Views: 54
  • Screenshot 2026-07-01 7.07.51 PM.png
    Screenshot 2026-07-01 7.07.51 PM.png
    942.9 KB · Views: 56
Yes, the yoke is for the PFX. It is one of the yokes that came with the Matsushita A68MAU085X tube.

I would strongly suggest you find a TV with a Matsushita flat tube to use the yoke with. They are not horribly uncommon and will bolt up with little trouble. I have this pairing with a couple A68LZU185X which we did get in some North American TVs. Mating a yoke made for a flat tube to a curved tube is not going to give you good purity or convergence no matter how hard you try.

Also, the PFX chassis does not need an isolation transformer.
 
  • Like
Reactions: nem
Thanks for the advice, there's definitely some Panasonic consumer sets with Matsu tubes, early GAOO's seemed to carry them. It's impossible to find a Toshiba PF Tube so I'd be happy with a good quality (flat) Matsushita.
Well I guess I'll leave the isolation tx. for another project, or just for hobbyist repair.

If I get it going I'll post some pics here, sooner or later I'll need to know how to make adjustments with the chassis.
 
I got a few cabs I’m willing to let go of and I’m in Toronto if you want to come by and take a look
 
Back
Top