Variations on the 13-pin ACC jack pinout

There are a handful of weird variations in the 13 pin accessory jack on Kenwood radios.

Radio 1 2 3 4 5 6 7 8 9 10 11 12 13
TS-140 NC NC Receiver output / 300mV / 4.7k Output ground Squelch control NC NC Ground Transmit PTT - MIC mute NC Data Input / 10mV Input ground PTT (not MIC mute)
TS-440 NC NC Data output / 300mV / 4.7k Output ground NC NC NC Ground MIC mute NC Data input - docs say 500mV or less; end up needing 1v PtP to see full SSB modulation Input ground PTT
TS-450 NC RTTY input Receiver output / 300mV / 4.7k Receiver output ground Squelch control NC NC Ground Transmit PTT - MIC mute NC Mic audio input Input Ground (via 0.001uF cap) PTT (not MIC mute)
TS-680 NC NC Receiver output / 300mV / 4.7k Output ground Squelch control NC NC Ground Transmit PTT - MIC mute NC Data Input / 10mV Input ground PTT (not MIC mute)
TS-690 NC RTTY input Receiver output / 300mV / 4.7k Receiver output ground Squelch control NC NC Ground Transmit PTT - MIC mute NC Mic audio input Input Ground (via 0.001uF cap) PTT (not MIC mute)
TS-711 NC NC Data out / 300mV+ at 4.7k Data GND NC NC NC NC Mic Mute NC Data Input / 500mV Data Input GND PTT
TS-811 NC NC Data out / 300mV+ at 4.7k Data GND NC NC NC NC Mic Mute NC Data Input / 500mV Data Input GND PTT
TS-940 ACC SW ACC SW Data out / 300mV+ at 4.7k Data GND NC NC NC GND Mic Mute NC Data Input / 500mV Data Input GND PTT
TS-2000 Sub-receiver output / 10k RTTY input Main receiver output / 10k GND Main receiver squelch control NC Sub-receiver squelch control GND Transciever PTT - MIC mute NC Mic audio input GND PTT (not MIC mute)

Differences

Notes