CONTROLS
1.
Power Switch
. Press switch to turn the power “ON”. The “ON AIR” indicator
should begin to flash. Press the switch again to turn the power “OFF”.
2.
ONAIR LED Indicator
. When the power is “ON”, the LED will flash to indicate
receive (RX) mode and the LED will be illuminated continuously when in transmit
(TX) mode. When the power is “OFF”, the LED will not be illuminated.
3.
PTT Switch.
Press the switch for transmit mode and release the switch for receive
mode. This can be used for a short QSO. If you have pressed the PTT LOCK
switch, the lock can be released by pressing the PTT switch.
4.
PTT LOCK Switch.
Press the switch to lock the microphone in transmit mode. The
“ON AIR” LED indicator will remain illuminated after the switch is released. To
disable the lock feature, press the PTT switch to return to receive mode.
5.
UP/DOWN Switches.
These switches are for changing the radio frequency up and
down. For details, please refer to your transceiver instruction manual.
6.
Microphone.
An electret condenser microphone is used for clear voice quality.
7.
Special Function Buttons.
These buttons allow you remote access to the special
features on your transceiver. These buttons are not compatible with all transceivers.
The buttons are as follows:
CALL
– Selects the call frequency
VFO
– Selects VFO mode for manual tuning
MR
– Memory Recall selects preset memory tuning
PF
– Activates the Preset Function feature
8.
Microphone Output Connectors.
Please use an interconnecting cable that is
compatible with your transceiver. Cables are available separately. For ICOM and
MFJ transceivers, plug the cable into Microphone Output Connector “A”. For Yaesu
and Kenwood transceivers, plug the cable into Microphone Output Connector “B”.
9.
FM/S SB Voice Quality Selector Switch.
Change the selector switch for the
microphone output audio quality for the mode in which you will be operating. In FM
mode operation, the output is adjusted to provide a clear voice quality with wide
frequency characteristics. In SSB mode operation, the output is adjusted to provide a
sharp and crisp voice quality for effective DXing.
10.
Selector for Output.
The switch allows you to select the Microphone Output
Connector that is suitable for your transceiver. For ICOM, Yaesu, and MFJ
transceivers, the selector switch should be placed in the “A” position. For Kenwood
transceivers, the switch should be place in the “B” position.
11.
Output adjustment Volume.
This is factory set to 10 mV RMS output from the
microphone. If needed use a 3mm flat head screwdriver to adjust the output to suit
your transceiver.
12.
Battery Cover.
Open the battery cover and insert two fresh AA batteries (not
included). Be sure to note the polarity markings inside the battery compartment.
Caution
•
Please be careful about high SWR of antenna and incomplete grounding. This may
cause RF feedback noise and could damage the MFJ-297.
•
Please turn off the power after use to extend battery life.
•
It is recommended that the batteries be removed from the MFJ-297 for prolonged
periods of inactivity.
•
Do not place the MFJ-297 in high temperatures and avoid direct sunlight.
•
Do not connect more than one transceiver at a time to the MFJ-297. This could
damage the transceivers.
Cables for MFJ-297 Desktop Microphone
MFJ Model No. Compatible Transceivers
Microphone Output
Connector
Selector Switch
Position
MFJ-5397I
ICOM 8-Pin Round
A
A
MFJ-5397K
Kenwood 8-Pin Round
B
B
MFJ-5397Y
Yaesu 8-Pin Round
B
A
MFJ-5397MX
ICOM 8-Pin Modular
A
A
MFJ-5397MX
Kenwood 8-Pin Modular
B
B
MFJ-5397MY
Yaesu 8-Pin Modular
B
A
MFJ-5399
MFJ
A
A
1. No Connect
1. Frequency Up
2. PTT GND
2. +8VDC
3. MIC Input
3. PTT GND
4. MIC GND
4. PTT
5. PTT
5. MIC GND
6. No Connect
6. MIC Input
7. Frequency Up/Down
7. No Connect
8. +8VDC
8.Frequency Down