Is there a wiring diagram for the "optimum" K3 RS-232 cable anywhere?
I know people are saying "use a standard serial cable"...
For normal use, you just needs pins 2, 3 and 5, plus the shield to the
connector shell.
If you want to support DTR or RTS signaling (for PTT and/or KEY from a
logging program, for example) then you also need pins 4 and 7. The
remaining pins (1, 6, 8 and 9) are currently not connected in the K3.
They will cause no harm if they are present, and you lose no
functionality if they are not.
I'd also like to make up audio interface cables.
6.5mm (1/4") stereo for front panel headphones, 3.5mm (1/8") stereo for
rear panel jacks. The rear panel mic is mono, using tip and shell, so a
3.5mm mono plug could be used. I suggest using a 3.5mm stereo connector
anyway.
The rear apron connectors are so-called RCA or phono, at least here in
the USA.
73,
Lyle KK7P
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