[Dave A]

Attached are two pix from my Col-R-Tel from about 2 years ago attached to a Philco also. Brave attempts were made to use a RCA, but it narrowed the bandwidth in the video amp section which would not pass NTSC information. Philco does much better at that.

Looking at the pix, you can see the obvious degredation of the pix with this Rube Goldberg contraption, but it does work. Forget resolution in the final viewing. You can see the shift of the color in mine because there is no delay line to line up the color processing with the luminance like a color set of the day would use. So it goes for fake color. And then there is the debate of adding delay in the set which would make it not factory original. I opted for original as viewed in 1956, errors and all. And the blue information is more to the turquoise side due to the filters used.

Changing the CRT to an aluminized version helps with the brightness to get through those filters. I did this as it was a 1956 possibility

Steve K...you note about the commutators inducing noise is spot on. I found that if I pulled the wheel and buffed up the circuit traces the bent wire brushes ride on, things cleaned up right away.

The aluminum band around the shell is one of the most important parts of the assembly. It keeps the spinning disc from interacting with atmosphere outside the shell. The Bernoulli effect kicks in here. The wheel is a soft plastic and will compress against the inside of the wheel shell if unprotected and drag it down. Think old Bernoulli drives where the disc was forced down to a head as it spins.

And there is a small secondary chassis to attach to the yoke of larger CRT (more than 12") size sets to shrink the pix to a useable size for the shell opening.

A broken brush has mine sitting on the sidelines until I send the assembly to a genius for rebuilding when I find the time. Pete Y, I have not forgotten you.

Dave A