Amplifying Receiving Set. (With Vacuum Tube Detector and Two Step
Amplifier Tubes)

(A) Fig. 47.--Six Step Amplifier with Loop Aerial

(B) Fig. 47.--Efficient Regenerative Receiving Set (With Three Coil
Loose Coupler Tuner)

Fig. 48.--Simple Regenerative Receiving Set (With Loose Coupler Tuner)

(A) Fig. 49.--Diagram of Three Coil Loose Coupler

(B) Fig. 49.--Three Coil Loose Coupler Tuner

Fig. 50.--Honeycomb Inductance Coil

Fig. 51.--The Use of the Potentiometer

Fig. 52.--Regenerative Audio Frequency Amplifier Receiving Set

Fig. 53.--How the Vario Coupler is Made and Works

Fig. 54.--How the Variometer is Made and Works

Fig. 55.--Short Wave Regenerative Receiving Set (One Variometer
and Three Variable Condensers)

Fig. 56.--Short Wave Regenerative Receiving Set (Two Variometer
and Two Variable Condensers)