I put a K12 into my SW40+. I like the K1EL keyers because unless you care about having a lot
of memories you can get by with just one SPST momentary switch. Also they run on 12V
and I really like being able to set the speed by directly entering it into the keyer. I didn't bother
tapping into the rigs audio chain so I just left the piezo speaker connected and disabled the keyer
sidetone, that way I can use the rigs sidetone but I still hear the responses from the keyer when
changing settings. Wiring is simple. Stereo jack connects to the paddle inputs on the keyer
(dit generally goes to tip, dah to ring and ground to shield) and output of the keyer connects to
the key input of the rig (i.e. the wires that originally went to the key jack) ... wire the the keyer
power connections and you are ready to go. If you want to have a separate jack for straight key
just wire it in parallel to the output of the keyer. I mounted the keyer upside down (ie solder side up)
just above the main board at the back of the rig using a small L bracket attached to the rear panel
of the enclosure so a screw hole in the back and a small switch on the front panel are the only
physical changes to the rig enclosure.
There are external keyers like the AA0ZZ http://www.4sqrp.com/EzKeyer.php
which can be built into the enclosure.
Has anyoen the documentation for adding an internal keyer? Or would you recommend
an external one? K1EL's is out of stock. Norcal QRP Club sells one...
72 de Chris KF6VCI