Icom IC-471H Instruction Manual page 12

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.
Brake adjustment screw
(It is unnecessary to remove the bottom cover for
the brake 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.
5-1-4 DIAL LOCK SWITCH
After the (С-471Н is set at a certain frequency for гад
chewing, mobile operation, etc., 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.
NOTE: When the letters "МЕО A" or "МЕО В" are dis-
played on the frequency display, we call this
condition "VFO МОРЕ", when the letters
"МЕМО" are displayed above the memory channel
number, we call "MEMORY CHANNEL МОРЕ".
These can be changed by pushing the VFO/
MEMORY switch alternately.
5-1-5 VFO SWITCH
The !C-471H contains two VFO's for both receiving and
transmitting. The VFO's are labeled "VFO A" and "VFO
B", and are selectable by pushing the VFO switch alter-
nately in the VFO MODE. The dual VFO system gives the
1C-471H 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!
1. "VFO A" is for both receiving and transmitting, and
selected by pushing the VFO switch. The receive and
transmit frequency will be controlled by "VFO A",
displayed on the frequency display, and stored in the
"A" memory.
2. "VFO B" is for both receiving and transmitting, and
selected by pushing the VFO switch. The receive and
transmit frequency will be controlled by the "VFO B",
displayed on the frequency display, and stored in the
"В" memory.
Switching from one VFO to the other VFO does not clear
the first VFO. The frequency and operating mode (and
duplex mode if any) are retained in the VFO's memory.
FOR EXAMPLE:
If 432.125MHz and USB are set with "VFO A", then the
VFO switch is pushed to select "VFO B", the frequency
display will show VFO B's frequency and mode, but
432.125MHz and USB are still stored in VFO A's memory.
Pushing the VFO switch again to return to VFO A,
"432.125.0" and "USB" will be displayed on the frequency
display.
Accordingly, if the VFO switch is pushed again to select
VFO B, the frequency and mode that were set with VFO B
will appear.
Pushing the VFO
switch to select
VFO B.
Pushing the VFO
switch again to
return to 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 "А" and "B".
It also allows you to search for a clear frequency with one
VFO, while keeping your operating frequency on the other
VFO. When you have found a clear frequency, switch back
to your operating frequency, inform the station you are in
contact with of the new frequency, and switch back. It's
that simple!
5-1-6 SPLIT SWITCH
The SPLIT switch changes the relationship of the two
VFO's. In the OFF (out) position, one VFO is for both
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