Interchangeability of Classic I And Classic II CRTs

[CC_333]

Hi,

According to Scott Baret's CRT Guide, the two aren't interchangeable. However, he doesn't seem to go into a great amount of detail, other than there are two connector types (A and B) , and that they are incompatible with one another.

What I am wondering is... can one take a Type B connector and simply solder it in place of a Type A, ore is there some PCB-level incompatibility, such as different pin spacing or wiring configuration, which would prevent this?

The reason I'm asking this is because I have recently gotten a new analog board for my Classic II, but it is a rev. A board (which therefore means Type A connector). I'd like to be able to use the existing CRT yoke (with a Type B plug) if I can, so I am going to try attempting modifications to the a/b to make it be compatible, if it's feasible.

Thanks in advance!

c

 

[nvdeynde]

What I am wondering is... can one take a Type B connector and simply solder it in place of a Type A, ore is there some PCB-level incompatibility, such as different pin spacing or wiring configuration, which would prevent this?

The tube is identical and can be used on all Compact Macs.

However the coil of the Yoke has to be identical: just swap the complete Yoke Coil with the connector and you're good.

Definately not swap the connector only.

It's an easy and straight forward job. Carefull not to overtighten then screw that keeps the coil in place, otherwise the bulb will brake.

 

[CC_333]

The tube is identical and can be used on all Compact Macs. However the coil of the Yoke has to be identical: just swap the complete Yoke Coil with the connector and you're good.

Definately not swap the connector only.

I was afraid of that!

Oh, well. I have the correct yoke on its way, so I don't have to make a mess of things.

Thank you!

c

 

[techknight]

swapping black and white yokes are cake. I always enjoyed that.

However, color yokes, not so much.... If you even as shift/move a color yoke, you have to do a full setup proceedure on the CRT again just about. meaning reconverge, adjust purity, etc..