Double Diode ~ Detector
The G-2-S / G2S Vacuum tube is a frosted shield
double diode detector. It was first manufactured in April
1927.
Grigsby-Grunow Co. used its Majestic branded tubes which
often had a G as prefix to the normal tube designation -
often separated by a hyphen. Some of these tubes are
metallized and then carry a suffix S (for shielded) -
with or without hyphen.
Electrical Data:
Heater Voltage ................................ 2.5 V
Heater Current ............................... 1.35 A
Substitute ....................G2