CHAMPION

manuals below are in the members area here

840
841
1954 range of radios 784 – 820 – 825 – 830
881 – 878

CIVILIAN RECEIVER

wartime AC model
wartime Battery model
Modifications sheet

COLUMBIA

manuals below are in the members area here

Servicing Columbia radios. This booklet includes circuit diagrams for the following models.
250 302 303 304 306 307 308 309320 333 350 351 352 500 602 603

COSSOR

50
385
469
494 – Melody Maker
494U – Melody Maker
500
501
501U – Melody Maker
512 – Melody Minor
522A
523A
584
3952