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A fixed channel is available for common
use on all bands by
installing a crystal in the socket on the AF-GAN unit (X49-
1110-01).
The crystal frequency can be computed by the
following formula:
Crystal Frequency (MHz)
=
5.5 MHz
—
X + Operating
Frequency (MHz).
X =
Band Switch frequency (1.5, 3.5, etc.)
Crystal specifications:
See Fig. 4-7
NOTE:
TRIO-KENWOOD
does not supply crystals.
The shift stet circuit CW frequency between transmit and
receive,
and the RIT circuit are not effective
in FIXED
CHANNEL OPERATION.
To use the fixed frequency oscillator, depress the FIX push
switch.
Q1, Q2 :2SC1815(Y)
'
150
100P
* 0022
100 150
p
I
-
CRISTAL SPECIFICATIONS
Type of holder: HC-25/u
Frequency:
5.5 ~ 6.0 MHz
Multiplication:
Fundamental
Fig. 4-7
Crystal Oscillator Circuit
4.7
CW OPERATION
(Fig. 4-8)
For
CW
operation,
your
transmit
frequency
should
be
"zeroed" to the transmit frequency of your contact station.
Receive frequency is 800 Hz lower than the transmit fre-
quency of your contact station, so that his signal is received
as an 800-Hz beat note.
This also allows your contact to
receive your signal without having to retune his receiver.
Tuning methods are detailed in the following paragraphs.
Contact station frequency
Receive frequency
1
Transmit frequency ~y
I
4
Beat signal
Your frequency
Transmit frequency,
|
Receiver frequency
800Hz
Beat note
Fig. 4-8 Tuning for CW
Operation
4.7.1.
OPERATION
WITHOUT
AN OPTIONAL
CW
FILTER
Set the IF SHIFT control to its center position and the RIT
switch OFF.
Adjust the main tuning control for an 800-Hz
beat note and your transmit
frequency will then coincide
with that of your contact station ("zeroed").
During recep-
tion, the side-tone monitor is activated by pressing down the
key (VOX OFF).
In this case, listen to the side-tone superim-
posed on the receive signal and adjust the main tuning for
similar side-tone and incoming CW audio tone.
By so doing,
transmit frequencies will be zeroed.
You may now adjust the RIT for a pitch which suits your
preference.
If intereference
is encountered, adjust the IF
SHIFT.
For more convenient
and effective CW operation,
use of the optional YK-88C or YK-88CN CW crystal filter is
recommended.
4.7.2.
OPERATION
WITH
A CW
FILTER
Set the IF SHIFT to its center position and the RIT to OFF.
Adjust the main tuning control for maximum
deflection of
the S-meter.
Receive signal pitch will be about 800 Hz, in-
dicating correct tuning.
13
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