General Electric K-40A Radio Service Data Sheet
July 1933 Radio-Craft

July 1933 Radio-Craft

July 1933 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.

Here is General Electric Model K-40-A Radio Service Data Sheet as featured in a 1933 edition of Radio-Craft magazine. As mentioned many times in the past, I post these online for the benefit of hobbyists looking for information to assist in repairing or restoring vintage communication equipment.

General Electric K-40A Radio Service Data Sheet

*Impossible to measure on ordinary voltmeter; on 25 cycles the voltages will be lower than those on 60 cycles. Voltages are measured to cathode. These figures are for set adjusted to maximum volume; line potential, 115 V., 60 cycles A.C., or D.C.

Note the use of a voltage doubling connection of rectifier V4; on A.C. the power output is greatly increased. Undistorted power output on A.C., 0.55-W.; on D.C., 0.15-W. Power consumption, 50 W, at 115 V, A.C. Since the frequency range is 540 to 1,710 kc., it is possible to receive police broadcasts on wavelengths below 200 meters.

Check power line characteristics and the position of Sw. 2 before connecting the set to the power line; disconnect the set before touching the chassis.

General Electric K-40A Radio Service Data Sheet, July 1933 Radio-Craft - RF Cafe

General Electric K-40A Radio Service Data Sheet Instructions, July 1933 Radio-Craft - RF Cafe

 

 

Posted December 11, 2015

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.