Curt,
Try backing off the power if the drive is excessive the harmonics will fall at a much
greater rate than the power.
As to QSK, change the wiring for the low pass relays so the do not switch for TX to
RX.? FIne a way to replace K3 with a very fast realy or electronic switching.
The replace K1 (the other side of the board) and replace with transistors to switch
DC from RX and TX.? Then you can consider QSK.? Oh and fix all the clicks and
pops without caps to delay the switching.? ? The current arrangement (prior to v3
through 5) you have no less than two relays operating sequentially (K1 triggers
K3 minimally) and relays are slow and two sequentially are slower.
If you are going to do all that might as well add switching for a good Cw bandwidth
filter.? That will spoil you even more.
I have radios (mostly Tentec) that do QSK and its hard to deal with the clunky
TS440S/at, FT817, and the Tempo-One with all the relays clacking.? You do get
spoiled.
My 1W, QCX, and SB (1 and II) all do QSK very well without pops and clicks.
So it can be done but many radios retrofitting it would be painful.
Allison
