No. 4333 (Model 5)

The Atwater Kent No. 4333 (Model 5) Breadboard Radio, introduced in 1923, the Model 5 was an example of the manufacturer’s early "compact" design, yet it was reportedly discontinued shortly after its introduction due to performance issues, which contributes greatly to its extreme scarcity today. Collectors widely regard it as one of the most beautiful and sought-after breadboard models, with rare, all-original examples commanding high prices. Technically, the receiver used a circuit described as "virtually identical electrically" to the Model 4066, employing two stages of Radio Frequency (RF) amplification. Its distinctive components included a Type 11 Tuner and a five-tube TA unit (Type 4330), a component specific to the Model 5 in commercial production. Board dimensions are 18" x 10".

No. 4333 Model 5 | Phil's Collection

Image Courtesy of Dave Slusarczyk // Check out his YouTube Channel!

Image Courtesy of John Jenkins | Visit the SparkMuseum!