The Macintosh CRT is a 9" B&W tube I think we are all familiar with. I have spares and not much to do with them. They are the same dimensions as a 9" green screen CRT from an Apple IIc monitor. Can I swap in a black and white CRT to replace a blown green CRT? Im talking a yoke swap OR putting new ends on the MAC yoke for the vert. and horiz. Has anyone done this?
If the CRT's you propose to swap have essentially the same part number, but say P31 for green and P4 white, or their part numbers indicate they are simply the same tube with a different phosphor, depending on the phosphor coding system, the swap is easy. You do not need to swap the yokes for a monochrome CRT swap (It is often easier in a color set to swap the CRT & yoke together because of the multiple adjustments required).
If the CRT's are differently numbered a range of things needs checking for a match:
1) Physical geometry, face curvature, length, deflection angle, neck diameter
2) heater voltage
3) guns structure, number of elements and typical focus voltage.
4) pin array at the base.
I have successfully replaced number of CRT's with different part number and different gun connections and phosphors and it usually works if you pay attention to the gun wiring and the heater voltage is correct.
If the two tubes are identical, just aside from the phosphor, it makes life very easy. I have never been too fond of green phosphor, probably because it has a fairly unimpressive grey scale on a picture, my favorites are white & Amber. I fitted a white CRT to an Apple II monitor in place of the green CRT it originally had.