DeForest and Atlantic-Pacific joined forces to produce and market this rectifier.
Joe comments that this design had dubious results.
Thanks to Joe Gruber for sending the images.
The balloon envelope is 50 mm in diameter and, excluding the UV base pins, is 92 mm tall.
Reference: Joe Gruber.
Updated August 04, 2020. shape:balloon construction:pinch type:rectifier.hw age:pre.1920 base:uv pins:4 pin:1.g1 pin:2.f pin:3.f pin:4.a