Model B Radiophone

Humble Manufacturing Co. Ltd.  Model B Radiophone
British Columbia, Canada Forest Service  Radio #  27 

This unit has a wooden case with the Transmit / Receive chassis and controls in the top half of the case and the batteries located in the bottom half, the microphone hangs on the inside of the door. When the door is closed and latched it is then classed as portable. That is as portable as they get in the 1930's 40's & early 50's.

There are no external jacks for earphones or code key.

There are two unidentified two pin sockets mounted on the chassis which are not identified. They are not available for users use. 

Dimensions: 
Wooden cabinet Lid closed:                 W:  8.25 " X  H: 12.5" X  D: 8.25"
                                                             Weight Without Batteries:   9.5 lbs
Metal Chassis:   Including Knobs         W: 7.625 " X H: 5.25" X D: 5.5" 
                                                             Weight   5.25  lbs
Frequency Range: 2952 to 3445 kc Crystal Controlled

Tubes: 
Transmitter:  3V4 3V4 3V4 3A4
Receiver:      1T4 1R5 1T4 1U4 3A4 3A5
                                           
Power Requirements:
Power for the entire Radiophone is supplied from dry batteries. There are two groups of "A" and "B" Batteries which are described as "Normal Duty Batteries" and "Light weight batteries".  Two cables are provided, one for the normal-duty and one for the light weight batteries. Either set of batteries may be connected to the Radiophone by plugging the cable into the cable socket on the front of the radio. The later model variant’s of this radio have the battery cable(s) directly wired into the chassis.

Batteries:
Normal Use;
Quantity:  Voltage:       Use:            Mfg:            Type: 
   8              3                A                General       #6  Ignition Cells                                          
   4             45               B                General        V-30-B
Lightweight (Portable)

Lightweight (Portable)
   1              3                   A            General        4H2
   4             45                  B            General        P-96-AA

Credits:    
Geoff Fors
Jerry Proc

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