Reducing Width beyond pot value?

srarcade80

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I built a monitor from a 25" Phillips tube and a wei-ya 825HR. Yoke resistances were close enough to try so I went for it. Ended up working near perfect, colors are fantasitc, clean signal, great geometry except the width is a tiny bit too wide, even with the width pot turned all the way down. I would love to keep using this tube, how can i get the width to come down a tad more? It's probably stretched about 1 inch or so wider than needed. Of course, I have no schematic for the wei-ya. (And please, lets not recite the whole 'get another chassis aka wei-ya sucks' non productive nonsense)

Can I -
1) Insert a worthy resister inline with the H yoke wires? (i know these can flow 40V+)
2) Insert a resistor inline with the width trim pot?
3) Swap the width coil? (need to know the original width coil inductance i suppose)
4) Change the capacitor tied to the width coil with something smaller?

Thanks
 
Thanks for the link Ken. Thats a great write up, this looks easy enough to do. I should be able to find this cap and try some other values.
 
Just make sure you change the proper one. Don't just go changing caps.

As Dave said, if we had a schematic, we could probably ID which one it is...
 
What is the marking of the width coil on the chassis? Does it say L902, L903, or L905? This is important to me.

I now have schematics of the Wei-ya 825HR and 826HR.

I'm thinking capacitor C908 which is supposed to be a .24 uf @ 400 volt PolyPropylene type is your width range cap in the 825HR.

C908 is .39 uf @ 400 volt PolyPropylene in the model 826HR.

Both Wei-ya models have a (N) narrower and (W) wider width range jumper on them too.
 
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What is the marking of the width coil on the chassis? Does it say L902, L903, or L905? This is important to me.

I now have schematics of the Wei-ya 825HR and 826HR.

I'm thinking capacitor C908 which is supposed to be a .24 uf @ 400 volt PolyPropylene type is your width range cap in the 825HR.

C908 is .39 uf @ 400 volt PolyPropylene in the model 826HR.

Both Wei-ya models have a (N) narrower and (W) wider width range jumper on them too.

You always manage to find the good "Dope".;)
 
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