udinmduro.com

A regenerative radio works by feeding back a small amount of amplified output of the detector back into the input. Thus it achieves sensitivity far beyond what only a detector could alone. This simple regen radio uses a single tube as it’s detector and amplifier; the “Audion”. It’s a great first project for those wishing to bring back some nostalgia by building one of the first amplified radio sets. Built on a board using point to point wiring and a set of period headphones, it can be a great functional conversation piece

R1150K Linear Taper Pot R212.2 Meg 1/4W Resistor R3110K 1/4W Resistor C11250pF 100V Ceramic Disc Capacitor C21365pF Air Variable Tuning Capacitor C3, C42120pF 100V Ceramic Disc Capacitor C510.1uF 100V Ceramic Disc Capacitor V113A4 Audion Tube3S4, 3Q4 (See Notes) L1130 Turns 26 AWG Magnet Wire (See Notes) L2180 Turns 26 AWG Magnet Wire (See Notes) L3120 Turns 26 AWG Magnet Wire (See Notes) S11SPST Switch HEADPHONE1High Impedance Headphones (2K or Greater) ANT1, ANT22See Notes MISC1Board, Wire, Sockets For V1, Case, Knob for R1, Clips for Antenna and Batteries