What is the pin-out for the DE-15 Accessory connector?
1 – DIG0 software definable TTL digital input (5V MAX!) Used for FSK keying and possibly other uses in the future. 2 – AUXBUS 3 – BAND 1 Output (TTL) 4 – PTT input (in parallel with MIC jack PTT ) 5 – COMMON (via 100 uH choke) 6 – DIG Out 0 (software definable TTL digital output) 7 – XVTR-ON (Power on signal for Elecraft XV series transverters / TX INHIBIT 8 – POWER (pull to ground with open collector or switch to turn K3 ON) 9 – BAND 2 Output (TTL) 10 – KEYOUT-LP (Same purpose as KEY-OUT on rear panel but lower current rating. Suitable for accessories such as sequencers.) 11 – DIG Out 1 (software definable TTL digital output) 12 – COMMON (via 100 uH choke) 13 – BAND 0 Output (TTL) 14 – BAND 3 Output (TTL) 15 – ALC input (0 to +5V MAX) Transmit power control via the ALC input (AUX I/O pin 15) is planned, but not finalized. We’re mindful of the negative impact ALC can have on transmit signal purity, a subject of recent debate within testing organizations. External amplifiers vary widely
