MFJ-495 Memory Keyer Instruction Manual
© 2001-2009 MFJ Enterprises, Inc. 33
allows up to four operators to use the keyer without having to reconfigure all the settings for
each operator. It also supports four different configuration settings for different contest
exchanges.
V reVerse – reverses the sense of the dot and dash paddles. When using paddles, the MFJ-495
normally expects the dot paddle to be connected to the tip of the plug and the dash paddle to
be connected to the plug's ring. If your paddles are wired in the opposite manner, or you wish
to change between right and left-handed operators, you may reverse the paddles.
W#### Weight – sets the automatic code weighting between ## percent at the counter-clockwise
position and ## percent at the clockwise position of the Speed control, where each ##
represents two digits in the range of 25 to 75. Weighting varies linearly with the overall
speed (automatic weight). Set both ## to the same value for constant weight, where
weighting is independent of the overall speed.
Weight is the duty cycle of a continuous string of dots, where 50% for perfect code. A higher
weight produces a heavier sound and a lower weight causes characters to sound lighter.
Weight can be set to remain constant and independent of speed, or it can be set to vary with
the code speed.
An alternating dot/dash is produced to aid in changing the weight. Press either the “–” or “+”
(or “=”) key to change constant weight, or enter two pairs of two digits 25 to 75 to set
automatic linear weight. Press ENTER to accept and exit, or press ESC to cancel and exit.
Tip: Type “W##” and then press TAB or ENTER to change only the counter-clockwise
position weight. Type W, press TAB, and then type ## to change only the
clockwise position weight.
X Xmit (carrier tune) – gives continuous key-down for adjusting transmitter or antenna tuner.
Press any key to exit and release the key line.
Y Pulse tune – gives continuous adjustable pulses for adjusting transmitter or antenna tuner.
Press F1 and F2 buttons to change the speed in the range of 50 to 99 WPM. Press F3 and F4
buttons to change the weight (duty cycle) in the range of 1% to 35%. Press ESC to exit and
release the key line.
Z### Zeros and nines – sets the way zeros and nines in the serial number are sent. The first # sets
whether to send the leading zeros as "0", "O", "T" or not at all (# = "N"). The second # sets
whether the other zeros are sent as "0", "O" or "T". The last # sets whether the nines are sent
as "9" or "N". For example, "ZO09" will send the leading zeros as "O" (dah-dah-dah), the
other zeros as "0" (dah-dah-dah-dah-dah), and the nines as "9" (dah-dah-dah-dah-dit).
## Play message – play message ## where the first # is the message number 1 to 8 and the
second # is the memory bank A to D.
>## Save message – save message into the keyer memory ##, where the first # is the message
number 1 to 8 and the second # is the memory bank A to D.
<## View message – view message ## where the first # is the message number 1 to 8 and the
second # is the memory bank A to D.
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