[Elecraft] Fldigi and signallink question interfaced to KX3

[Richard Ferch]

In order to send CW in CW mode, the KX3, like any other amateur radio
transceiver, needs an on-off keying input to its CW key jack. In CW mode,
amateur transceivers do not respond to audio input.

fldigi's primary method of sending CW is to produce an audio tone from a
sound card (such as your SignaLink). This cannot be used directly with a
rig in CW mode; the rig has to be in SSB. In SSB the rig's dial frequency
will be off by the sidetone frequency, as you have noticed, but the
frequency displayed and logged in fldigi should be correct if the program
is configured correctly.

There is a circuit in the fldigi documentation for converting fldigi's
"QSK" signal (an audio signal on the right channel of the sound card) to an
on-off keying signal - see <
http://www.w1hkj.com/FldigiHelp/cw_keying_page.html>. The SignaLink is a
single-channel sound card (left channel only) and does not support the
right channel, but fldigi does have a means for switching the two channels
- perhaps this could be made to work. Someone on this group may have done
this and be able to advise you whether it can be done successfully.

Another option is a K1EL Winkeyer (<http://k1el.tripod.com/WKUSBX.html>).
Current versions of fldigi support the Winkeyer, which provides an on-off
keying signal that transceivers like the KX3 can use in CW mode. See <
http://www.w1hkj.com/FldigiHelp/cw_winkeyer_page.html> for configuration
information on using a Winkeyer with fldigi.

73,
Rich VE3KI


N7TB wrote:

Will fldigi send CW correctly in cw mode on the KX3?  If so, what am I
doing wrong.