Hi Tom,
Your screen shots of the 21CT55 are stunning! I will be doing one of these this winter. I'm excited now after seeing yours. THe one I have has a very good kine, and RCA Colorama that was rebuilt at the factory.
The cross reference for these coils can be found in the Sams Photofact for the CTC-2, this info was given to them by RCA. I will post it here.
- RCA # 74214 (180uh) = Merit TV-184 = Miller 6180
- RCA 71526/98482 (250uh) = Merit TV-185 = Miller 6181
- RCA# 71793 (36uh) = Merit TV-180 = Miller 6176
- RCA# 72523 (120uh) = Miller 6153 (No Merit)
- RCA# 79185 (1 mh) = Miller 4652 (No Merit)
- RCA# 78902 (6.7mh) = Miller 4670 (no Merit)
- RCA# 78903 (1.9mh) = Miller 4664 (no Merit)
Take care,
Kirk