GD-1B Grid Dip Meter.

Sensitivity control

Usable as oscillator or absorption wavemeter

Extra low-frequency coils available

Frequency Range: 2-250mc using 5 plug-in coils supplied with kit (350 kc-2000 kc with additional coil set)

Meter Movement: 500 microamperes

Circuit: 6AF4 or 6T4 high frequency triode in a Colpitts oscillator circuit

Power Supply: Transformer operated with selenium rectifier

Physical Specifications: Length 7", Width 2½", Depth 3¼"

Power Requirements: 117 volts, 50/60 cycles at 5 watts

4 lbs.  
1954:  $19.50.