Crosley Model 120 Senior Superheterodyne (Pliodynatron) Chassis Radio Service Data Sheet
June 1931 Radio-Craft

June 1931 Radio-Craft

June 1931 Radio Craft Cover - RF Cafe[Table of Contents]

Wax nostalgic about and learn from the history of early electronics. See articles from Radio-Craft, published 1929 - 1953. All copyrights are hereby acknowledged.

In the diagram below is shown the foundation chassis incorporated in a number of superheterodyne receiver-s manufactured by the Crosley Radio Corp., Cincinnati, Ohio Standard consoles are the models Super-Administrator and Super-Rondeau; while the Super-Sondo console is a radio and phonograph combination. Available constants for the components will be the first consideration.

Crosley Model 120 Senior Superheterodyne (Pliodynatron) Chassis

If, when the receiver is carefully turned to the middle of the band, the dial reading does not correspond to the frequency of the signal, but is not more than two channels off, set the dial at the correct frequency, and adjust the trimming condenser C3A (the control farthest toward the rear of the chassis) until the signal is loudest. Check the tuning by readjusting the station selector. It may be impossible to regulate the oscillator trimming condenser C3 so that the oscillator condenser is properly aligned with the exact dial setting; in which case align the trimming condenser with a dial setting as close to the actual frequency as. practicable.

Crosley Model 120 Senior Superheterodyne (Pliodynatron) Chassis Radio Service Data Sheet, June 1931 Radio-Craft - RF Cafe



Posted August 31, 2016

Radio Service Data Sheets

These schematics, tuning instructions, and other data are reproduced from my collection of vintage radio and electronics magazines. As back in the era, similar schematic and service info was available for purchase from sources such as SAMS Photofacts, but these printings were a no-cost bonus for readers. There are 220 Radio Service Data Sheets as of February 2, 2018.