[Elecraft] FW: K3: CW in SSB mode broken?

[Oliver Dröse]

> While it might be possible to modify control to allow CW in SSB with
> PTT if PTT and CW were activated at the very same instant (by adding
> diodes from key in, dit in and dah in to PTT In), that would not fix
> your issue with a sequencer since the sequencer (and foot switch) will
> generally set PTT some fraction of a second *before* CW in any case.

Well, it actually depends on the sequencer, I'd say. ;-))

Within the "FA station manager" (http://www.dh8bqa.de/fa-sm/fa-sm-en.html) I 
designed the sequencer to only switch input trigger = output trigger. That 
means if you trigger the sequencer by PTT (i.e. from the mic) it will switch 
all stages for pre-amp, amp, etc. and then PTT to TRX as the last stage. If 
the trigger is CW then it will switch all stages for pre-amp, amp, etc. but 
*not* PTT to TRX but just opens the CW interlock to TRX so the radio will 
not see a PTT signal, only the CW signal. Therefor CW in SSB with the K3 
works perfectly well even using a sequencer. ;-))

Nevertheless using TX-INH is probably the easier solution for K3's that 
already have a DVR built in (plus CW anyway). I've designed a solution for 
that case, too, but not yet up on my website.

Vy 73, Olli - DH8BQA
http://www.dh8bqa.de/