Quote:
Originally Posted by jr_tech
Aluminized 19AP4?19AP4; clear glass, single magnet ion trap.
Poor/complicated layout?
To me, it really looks like a "factory kludge"... The chassis still has the punch outs for the (5) 25Z6 rectifier tubes used in the 10 inch models plus other unused punch outs. 
jr |
The early chassis, you're referring to, used in the 10" model with the 25Z6's was a totally different layout.
This chassis was used in the slightly newer models, with CRT's from 10" to 19", some with AM-FM radios. The front right corner, looking from the rear, had all kinds of knockouts for the radio IF transformers and tubes. It was cheaper to use the the same tooling, than to make up new.