Procedural Steps (Cont):
Set the MODE SELECTOR SWITCH (3) to the receive only (right) Position.
q. Depress and hold the TONE CALL BUTTON (25). A tone should be heard in
the earphones. Rotate the FREQUENCY TUNING KNOB (27) until a zero beat is
obtained. While rotating the FREQUENCY TUNING KNOB (27) the tone should be
heard to progress from a high pitch to a low pitch then to a high pitch again. The
proper setting of the FREQUENCY TUNING KNOB (27) is the point at which the tone is
at its lowest pitch or totally absent.
Note the relative positions of the index line and the frequency graduation line
through the FREQUENCY DIAL VIEWING WINDOW (5). If the index line is within 1/5
of a frequency graduation (5 KHZ), no adjustment of the index line is necessary
Proceed after releasing the TONE CALL BUTTON (25). if the index line is not within
1/5 of a graduation (5 KHZ) the following adjustments must be made:
(1) Release the TONE CALL BUTTON (25). Using a screwdriver, remove the
INDEX LINE ADJUSTMENT (4) plug.
This adjustment is quite stiff. Care should be exercised to
not change the frequency setting while adjusting the index
(2) Insert the screwdriver into the hole disclosed and contact the index line
adjustment. Rotate the adjustment right or left until the index line exactly corresponds
to the selected frequency graduation line.
(3) Replace the INDEX LINE ADJUSTMENT (4) plug.
(4) Check the setting by repeating steps (q) and (r). When no adjustment is
required, proceed to the next step.
Return the MODE SELECTOR SWITCH (3) to the Simplex position (left).
t . Set the PRESET CHANNEL/CONTINUOUS TUNE SELECTOR SWITCH (18) to
the preset #1 position.
u. Set the PRESET CHANNEL BAND SELECTOR (11) to correspond with the
desired band. Frequencies between 20.0 and 35.75 MHZ are set on Band I (switch up);
frequencies between 35.8 and 51.5 HMZ are set on Band II (switch down). Band
selections are indicated by the BAND INDICATOR lights (13).
v. Open the PRESET LOCKING SCREW ACCESS COVER (19) on the front panel
and loosen the PRESET LOCKING SCREW (6) marked "1" by turning the locking screw
counterclockwsie until the slot is at right angles with the red circle. To release the
preset locking screw, use the special key (not shown) attached to the case of the radio.