Model 16 and 17 Q-AVC Adjustment & Operation
The
knurled brass adjusting screw at the left rear of the chassis controls the
inter-station noise-suppression feature. (This applies to the Code 121 and 122 Model 16 only). This screw [variable resistor]
controls the sensitivity of the receiver at which the automatic volume control
begins to function. At the time of adjustment, the screw should be turned
in a counter-clockwise direction until the best average reception is obtained
with a minimum of inter-station background noise for the particular location
in which the receiver is operated.
The
switch on the side of the cabinet should be in the UP position when the
above adjustment is made. When the switch is in the DOWN position, the quiet
automatic volume control [QAVC] feature is eliminated and the maximum sensitivity
is available at all times. It is sometimnes desirable, when tuning in distant
stations, to place the switch in the DOWN position temporarily.
From the Philco Serviceman - August, 1933.
