TO RECEIVE 1. Move receiver box switch from OFF to MCW (for voice) or CW (for code). 2. Place channel selector switch in A or B to correspond with the jack used for the headset plug. It is usually A. 3. Set filter box switch control to RANGE, VOICE or BOTH, whichever is desired. 4 .Tune to frequency desired with the tuning knob. 5. Adjust volume with the volume control.

TO TRANSMIT 1. Move the transmitter selector switch to the transmitting frequency desired. 2. Set the battery switch ON. (Allow about 15 seconds to warm up the tubes.) 3. Place the emission switch on TONE, CW, or VOICE, as desired. 4. Press down the press-to-talk button on the stick and talk.

MICROPHONE The VBF set and 274-N both employ a throat mike which fits over your vocal chords just below your chin. Adjust the mike by lengthening or shortening the elastic band which goes around the back. of your neck. Keep the mike fitting snugly-about as tight as a necktie. For best results when transmitting, press the mike firmly against your throat with your hand. EMERGENCY PROCEDURE If your radio is out, rock your wings upon approaching a landing field. At night blink your landing lights. The tower flashes your landing instructions: green light means come in; red light means wait.

Caution : Do not lower your landing light if your airspeed is higher than 140 mph.