Zenith Roundie HV Question - Help Please

[compucat]

I replaced the horizontal efficiency coil in my '65 Zenith (chassis 25MC33) and the horizontal output tube. The trouble was no Horiz. output, raster etc. I now have horiz. output (neon lamp test glows) but no HV and damper tube arcs and when damper arcs I see purple glow in CRT neck. The neon glows at the plate cap to the HV rectifier so I believe the flyback is alright. I feared a shorted CRT but the tester reveales full emisson on all guns with no shorts. When I disconnect HV rect. there is no purple glow in CRT. I have not replaced the damper, HV rect, HV regulator or focus rectifier. Could any or all of these account to no HV and purple CRT glow? The CRT neck only glows/flashes purple when damper is arcing. I have yet to see a raster or any kind of light on the screen.

Any advice would be appreciated as I am now ready to finally get this old set going. Thanks as always.