NO. 3955 & 3960 (model 3)
The Atwater Kent No. 3955 (Model 3) Receiving Set was introduced shortly after the Model 2, appearing in late 1922, with an original price of $37.50. This battery-powered "breadboard" radio was a three-tube set, featuring a detector-two stage amplifier circuit (a Tuned Radio Frequency or TRF design) and typically using one UV-200 detector tube and two UV-201 amplifier tubes. The key technical advancement in the Model 3 was an improvement to signal clarity: Atwater Kent engineers intentionally separated the detector tube from the audio amplifier stage on the wooden base . Also available was a variant set (No. 3960) without the Variometer and the Two-stage amplifier, which was a more cost effective solution for those who may have already owned a suitable amplifier. This variant is illustrated below. Board dimensions are 24-1/2" x 8-1/2".
No. 3955 - Image Courtesy of Grant Kornberg, Technogallerie
No. 3955 - Image Courtesy of Grant Kornberg, Technogallerie
No. 3955 - Image Courtesy of Grant Kornberg, Technogallerie
No. 3955 - Image Courtesy of Grant Kornberg, Technogallerie
No. 3955 - Image Courtesy of John Jenkins | Visit the SparkMuseum!
No. 3955
No. 3955
No. 3955
No. 3960 - Based on Image Courtesy of Grant Kornberg, Technogallerie
No. 3960