Icom IC-R71A Instruction Manual page 12

(for example; 14.999.9MHz), and further turning of the
control brings the frequency to the next upper MHz range
(15.000.0MHz) and continues up the frequency from there.
By turning the control counterclockwise, the operating fre-
quency changes in like manner to the next lower MHz range.
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Brake Adjustment
If the control is too loose or too stiff for comfortable use,
you can adjust the torque by tightening or loosening the
brake adjustment screw accessible from underneath the set.
—f-
wa ES, >
Brake adjustment screw
(It is unnecessary to remove the bottom cover
for adjustment.)
The following instructions should be used to adjust the
tension of the Tuning control.
1. The Tuning control tension will become tighter by
turning the brake adjustment screw clockwise, and will
become looser by turning the screw counterclockwise.
2. While performing this adjustment, the Tuning control
must be turned continuously as the screw is adjusted in
order to set the tension for a comfortable touch.
5-1-5 DIAL LOCK SWITCH
After the IC-R71 is set at a certain frequency by pushing
the Dial Lock switch, the VFO is locked at the displayed
frequency, thus inactivating the operation of the tuning
control. To change the frequency, the Dial Lock must first
be disengaged by pushing and releasing the Dial Lock
switch again.
5-1-6 VFO SWITCH
NOTE: When the letters "VFO A" or "VFO B" are
displayed on the frequency display, we call this
condition as '""VFO MODE", when the letters
"M ch" are displayed above the memory channel
number, we call as "MEMORY CHANNEL MODE".
These can be changed by pushing the VFO/
MEMORY switch alternately.
The 1C-R71 contains twa VFO's. The VFO's are labeled
"VFO A" and "VFO B", and are selectable by pushing the
VFO switch alternately in the VFO MODE. The dual VFO
system gives the IC-R71 many very convenient features.
Please read this section very carefully and perform the
Operation several times until! you are comfortable with the
system. Try the example for practice!
~10—
1. VFO "A" is selected by placing the VFO switch in the
"A" position. The receive frequency will be controlled
by VFO "A", displayed on the frequency readout, and
stored in ""A'' memory.
2. VFO "B" is selected by placing the VFO switch in the
"B" position. The receive frequency will be controlled
by VFO "'B", displayed on the frequency readout, and
stored in ''B'' memory.
Switching from one VFO to the other VFO does not clear
the first VFO. The frequency and operating mode are
retained in the VFO's memory.
FOR EXAMPLE:
If 14.252MHz and USB are set with the "VFO A", then
the VFO switch is pushed to select the "VFO B", the
frequency display will show VFO B's frequency and mode,
but 14.257MHz and USB are still stored in the VFO A's
memory.
Pushing the VFO switch again to return to the VFO A,
""14.257.0" and "USB" will be displayed on the frequency
display.
Accordingly, if the VFO switch is pushed again to the VFO
B, the frequency and mode that were set with the VFO B
will appear.
Pushing the
VFO switch to
select the VFO B.
Pushing the
VFO switch again to
return the VFO A.
This allows you to set a certain frequency with one VFO,
work up and down the band with the other VFO, and
periodically check the set frequency simply by switching
between VFO "'A" and "'B".
5-1-7 TRANSFERRING VFO FREQUENCY
The VFO EQUALIZING switch allows either VFO's to
be brought to the exact frequency and operating mode of
the other VFO without turning the tuning control and
pushing the mode select switch. .