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Transmitting
Operation
position (right), and the
KEYER
slide switch is
in the
MAN
position (left).
0 Press the
VOX
button to turn on the VOX cir-
cuit, which in CW mode provides automatic
transmitter activation when you close the key.
0 Now you can adjust the
RF PWR
control for
the desired power output. Note that if you
select less than maximum power output and
press the
ALC
meter selector button/LED, the
meter reading will deflect beyond the ALC
zone. This is perfectly normal, and does not
degrade your signal.
0 Release the key to return to receive.
Courtesy of the VOX circuitry, you are now
using semi break-in CW, in which the transmit-
ter remains keyed except during pauses in your
sending. You can set the "hang time" during
which the transmitter remains on after you stop
sending, by adjusting the
DELAY
control on the
rear panel. This is the same control used in VOX
operation, and will affect VOX switching too, so
you may need to choose a compromise setting.
If you prefer full break-in (QSK) operation, in
which the receiver is activated between each dot
and dash, simply slide the
BREAK-IN
switch to
FULL
(left).
Using the Internal Electronic Keyer
You will need to connect keyer paddles to the
KEY
jack to use the keyer (see previous page).
0 Once you have set u p CW transmission as just
described, you can activate the keyer with the
KEYER
slide switch on the top panel, by slid-
ing it to the
AUTO
(center) position.
-
Sidetone
&
Button Beeper Volume
The volume of the CW sidetone and that of
the beep that sounds when you press a front
panel button can be adjusted by a single trim-
pot located in the hole just in front of the rear
bumper on the left side of the set. First set the
AF
control for normal volume on a received
signal or noise, then use a small screwdriver
to adjust the trimpot either while closing your
key or while pressing a button (unless you
have disabled the beeper). This volume set-
ting is independent of the receiver volume.
Note that the pitch of the sidetone is fixed at
about 700 to 800 Hz, and cannot be adjusted.
0
Now squeeze the paddles, and adjust the
SPEED
slide potentiometer on the top panel
for the desired speed.
With the
KEYER
switch in the
AUTO
position,
dot:dash weighting is 1:3. If you prefer a heavier
(1:4.5) weighting, slide the
KEYER
switch to the
WT
(rightmost) position.
The keyer works for both semi and full break-
in keying, as described in the previous section.
AM Transmission
Transmitter power output in the AM mode
must be limited to 25 watts (carrier) with the
RF
PWR
control. Setting it for higher levels reduces
readability. After setting the power level, you
need to adjust the
MIC
control to avoid over-
modulating. This setting will be lower than the
optimum SSB setting.
0 VOX and the speech processor can both be
used in the AM mode, but for now, make sure
the
VOX
and
PROC
buttons are off, so as not to
confuse adjustments.
0 With the
AM
mode selected, press the
PO
me-
ter selection button/LED. After listening to
make sure the frequency is clear, close the PTT
switch and, without speaking into the micro-
phone, adjust the
RF PWR
control for 25 watts
(or less) on the meter (the upper markings on
the second scale from the top).
0 Now press the
ALC
button/LED, close the
PTT switch, and speak into the microphone
while adjusting the
MIC
control just to the
point where the meter begins to kick up slightly
at the low end of the ALC scale. Do not set the
MIC
control further clockwise than this, or
your signal will be distorted.
0 Reduce the
RF PWR
control, as necessary, for
the necessary output level.
See also Processor Frequency Shift in the box on
page 18 for details on setting u p the speech proc-
essor for AM.
FM Transmissio n
For FM transmission, the only control to be
concerned about is
RF PWR.
Microphone gain for
FM is preset internally and normally needs no
adjustment after leaving the factory. Just set the
METER
selector to the
PO
position, and adjust the
RF PWR
control for the desired output while
transmitting. To avoid overheating, if you need
full power, keep your transmissions to three min-
utes or less, with the same time for reception.
page
20
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