A lot of the time, you don't have to QSY much on CW, so the step isn't all that super important. Just pick a spot and give out a few CQ's. Of course you have to have some other receiver than the HT unless it receives SSB/CW.
(I used to get some SSB/CW QSO's on the old birds) Call CQ on CW and get a SSB answer or vice-versa.. Of course at that time most folks could copy CW.
73 John
I was doing some testing here at home with this. I used an IC-W32A and IC-T7H with a straight key plugged into the mic jack on each radio. Nothing fancy from the key, just an adapter to fit the 3/32" (2.5mm) jack, and I could key the transmitter. When I did this, listening on another radio, I could hear only the carrier. No audio was coming from the HTs' built-in mics.
I might try this on FO-29 this evening, and maybe VO-52. One additional drawback with an HT for a CW transmitter is the fact that most HTs (including these two I tried this morning) have 5 kHz as the smallest tuning step. I also have an FT-817ND, but I only have one of those radios. Otherwise, I would be trying all of this with a pair of FT-817s and making some CW and SSB contacts.
73!
Patrick WD9EWK/VA7EWK