No. 4700 (Model 10C)
The Atwater Kent No. 4700 Model 10C Receiving Set was the final and most refined mass-produced version of the three-dial breadboard, introduced on May 29, 1924. This set maintained the established, high-performance five-tube Tuned Radio Frequency (TRF) circuit, featuring two RF amplification stages, one detector, and two AF amplification stages, powered typically by four UV-201A tubes and one UV-200 detector tube. The core design of the 10C was driven by simplifying the internal circuitry for more reliable and cheaper mass production.
The most notable change was the elimination of the separate potentiometer that had been present on the Models 10A and 10B. Instead, they replaced it with a fixed 800 Ohm damper resistor for controlling the RF amplifier grid bias.
Two versions of the No. 4700 were produced with the same part number, a standard board length of 10" x 29", and the compact 10"x 26".
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No. 4700 (Model 10C) Short Board
No. 4700 (Model 10C) Short Board
No. 4700 (Model 10C) Short Board