[Elecraft] K3 to K3/0 Mini Direct Connection

[Dauer, Edward]

Following up on the earlier post, in which a couple of others also
expressed an interest:  The quick answer is no, the K3 cannot be cabled
directly to the K3/0-Mini acting as a control head.  Elecraft support
writes: "The biggest obstacle is the K3/0 communicates using TTL and the
K3 communicates using RS232. Someone would have to build a TTL to RS232
converter to start. The other issue would be a circuit to turn on and off
the K3. That would have to be configured. I am attaching a simple circuit
to do this.²  If anyone has experience with a TTL-to-RS232 converter that
might do the trick, I would be much obliged to hear suggestions . . .
Thanks,

Ted, KN1CBR