• The RING of the connector is DAH.
For connecting a straight key, mechanical semi-automatic key (e.g. a “bug”) or an external keyer/computer:
• The RING of the connector keys the transmitter.
Note that the DAH/Straight Key connection is the same as the “PTT” line on the Microphone connector.
Now, press the MENU button (F1) and use the NEXT and PREV buttons (F4 and F3, respectively) to navigate to the
screen containing the menu item “CW Keyer Mode”, noting the setting to the right of it. The three possible settings
are:
• IAM_A – Iambic mode “A”. Using paddles, alternate dots and dashes are sent with both paddles are
depressed, stopping with the last dot or dash that was sent while the appropriate paddle was depressed.
• IAM_B – Iambic mode “B”. The same as mode “A” except that keying continues by sending one more
element – a dot if the paddles were released during a dash and vice-versa.
• STR_K – Straight Key. This would be used for a straight key, a “bug”or external keyer/computer.
Additional items on this menu (you may need to scroll to another screen using ENC2) include:
• CW Paddle Reverse – This reverses the DIT and DAH positions of the paddle, affecting ONLY the IAMBIC
modes when using the built-in keyer and has no effect when using a straight key.
• CW TX->RX Delay – This sets the delay, after the last CW element, before the transceiver returns to receive
mode.
• CW Side/Off Freq – This sets the offset frequency and sidetone in CW operation, adjustable in 10 Hz steps.
• Important Note: If the sidetone frequency is adjusted, the center frequencies of the narrow (300 Hz
and 500 Hz) filters should be adjusted to keep the frequencies within the filter passband!
• CW TX/RX Offset – This selects whether USB or LSB is used for CW reception or if LSB is automatically
selected below 10 MHz. This also selects whether the displayed frequency is that of the transmit frequency
or that of the signal being received and whether a frequency shift occurs when switching between SSB and
CW mode: See the main manual for more information!
• The parameters CW Keyer Speed and CW Sidetone Gain are also adjustable from the main display.
(“WPM” and “STG”, respectively)
To configure for CW operation:
• Press button G1 to select the CW mode.
• Press button G4 to select the desired receive audio bandwidth.
• Press button G3 to set the power to 0.5 watts: The power has little effect on this adjustment.
• Press button M3 to highlight the WPM parameter: Use ENC3 to set the desired sending speed in words-per-
minute. This parameter has no effect if set to straight-key mode.
• Press button M1 to highlight the STG parameter: ENC1 is used to adjust this parameter.
• Press the paddle/key to cause the mcHF to transmit: Use ENC1 to adjust the volume of the sidetone. Note
that the volume control (“AFG”) setting has no effect on the level of the sidetone.
• Once you have configured the settings to your satisfaction, press-and-hold button F1 to store them in
memory.
Miscellaneous notes and tips:
• The DSP “NR” (Noise Reduction) mode may be used to advantage when in CW mode, but note that the DSP
“NOTCH” mode is always disabled because it would “kill” CW signals!
• The sidetone frequency is always exactly that of the amount of transmit offset from the dial frequency.
Whether or not the transmit frequency is offset from the displayed frequency or not depends on the “CW
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