7
just the speed with the speed set feature. Remember you are in Farnsworth mode so you can only adjust
word spacing. All character speed is set to 18 words per minute. Get ready to copy. Press the Random Code
Function key and take code for a couple minutes. When you get to a stopping point squeeze the paddles to-
gether to end the session.
Restart the session again by pressing the Random Code Function key. The code session will start again and
you should be able to check your copy. The same code session will repeat until you turn off the power or
toggle the R8 command in the Command Mode.
After you have practiced the A-F set you can move to the next set by entering 02 - 08 in the command mo-
de.
BATTERY REMOVAL AND INSTALLATION
The lithium cell on this keyer should last 2 years or more. The battery can be tested by removing the cover
and turning the unit ON. Test the voltage of the battery from the battery (+) to the chassis (–). The voltage
tested should be over 2.7 volts or the battery should be replaced. To replace the battery the unit must be
powered ON. The battery is carefully removed and a new one carefully inserted.
MEMORY EXPANSION
To expand an MFJ-492 to 8×1000 character message memories, you can order the MFJ-80 Expansion Ram
kit from MFJ or upgrade the keyer yourself with an HM6264ALP-10 or equivalent static ram chip. First remo-
ve power and the lithium battery. Install the chip matching the notch printed on the circuit board. Turn the
unit ON with the Menu key held down and reinstall the lithium battery.
Summary of Contents for MFJ-492
Page 1: ...MFJ 492 Menu Driven Memory Keyer Manual ...
Page 11: ...10 ...
