MFJ-495 Memory Keyer Instruction Manual
24 © 2001-2009 MFJ Enterprises, Inc.
Note: It is recommended the Farnsworth mode be disabled when sending with the paddle.
When Farnsworth mode is enabled, the paddle will send code at the Farnsworth
speed, not the overall speed.
G# Gap (word space) – increases the word space with # standard intra-character spaces, where #
is a single digit from 0 to 9. This allows the normally seven-unit long word space up to 16
units long. Note the word space is always at least four units longer than the inter-character
space.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the word spacing, or
enter one digit 0 to 9 to set the word spacing. Press ENTER to accept and exit, or press ESC
to cancel and exit.
H Hand key – enters the hand key mode to use the SPACE key as a hand (straight) key. The
keyer responds with "HK" (di-di-di-dit dah-di-dah). Dots and dashes are made manually by
using the space bar on your keyboard. That is, keying follows closure of the dot or dash
paddle or the SPACE key, allowing hand-sent code. Normal keyer operation is regained by
squeezing both paddles or by pressing the ESC key.
I# Iambic – enables iambic A or B mode where # represents A or B, or disables iambic
operation with # = N. The keyer will respond with "A" (di-dah), "B" (dah-di-di-dit), or
"OFF" (dah-dah-dah di-di-dah-dit di-di-dah-dit). Press ESC to cancel and exit.
J#### PTT hang time – sets the PTT (push-to-talk) hang time to #### millisecond, where ####
represents four digits in the range of 0001 to 9999. This controls the time between when CW
keying is ended and when the PTT will de-assert. You may adjust this to your liking for on-
the-air sending.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the hang time, or enter
up to four digits 0001 to 9999 to set the hang time. Press ENTER to accept and exit, or press
ESC to cancel and exit.
K## Keying compensation – sets the keying compensation to ## millisecond, where ## represents
two digits in the range of 00 to 25. Some radios have a key delay of 5 ms or more. By
entering K05, the keyer will add 5 ms to the dots and dashes and subtract 5 ms from the intra-
character spaces. Although similar to increasing weight, this adjustment is independent of the
speed. This setting is used primarily to correct keying distortion by certain transceivers and
to eliminate the problems with a transmitter key delay.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the compensation, or
enter up to two digits 00 to 25 to set the compensation time. Press ENTER to accept and exit,
or press ESC to cancel and exit.
L## Lag (keying delay) – sets the keying delay to ## millisecond, where ## represents two digits
in the range of 00 to 20. This setting is used primarily to accommodate switching delay in
certain station setup. It is used in conjunction with the PTT line to delay the keying output
until all the switching is finished; that is, the keying output is lagged behind the sidetone
audio and the PTT output. This controls the time between when PTT is asserted and when
CW keying will start.
Press LEFT or DOWN to decrease or press RIGHT or UP to increase the delay, or enter up to
two digits 00 to 20 to set the delay time. Press ENTER to accept and exit, or press ESC to
cancel and exit.
M# Monitor – enables (#=Y) or disables (#=N) the sidetone monitor, or toggles the sidetone
monitor on or off without the #. If the sidetone is turned off, it will still play command
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