NO. 3955 & 3960 (model 3)

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

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".