KPA500 Control

[Elecraft mailing list]

Are there lines either in the AUX DB15, or one of the other connectors that
can be used to turn the AMP on in operate mode and later release it turning
it off.

 

John,

Ad2F

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[ANDY DURBIN]

"Are there lines either in the AUX DB15, or one of the other connectors that can be used to turn the AMP on in operate mode and later release it turning it off."

No, not exactly as you described.  You have to apply a momentary ground to pin 8  - as revealed by a quick review of the KPA500 Owner's Manual.


KPA500 AUX Connector Pinout (DE-15 Male)

POWER ON/OFF 8 IN Pulse low to turn KPA on or off – do not hold low!

Menu selection:

PWR ON  // STBY or OPER default STBY // STBY: Amp is in standby mode when first turned on.  OPER: Amp is in operate mode when first turned on.

Andy, k3wyc
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[ANDY DURBIN]

"No, not exactly as you described.  You have to apply a momentary ground to pin 8 "

If you are already controlling the KPA500 by using the PC serial port you can wake it up by sending P -

P Power On
The P command will cause the KPA500 to perform internal firmware checks, then execute the main
firmware to power up the amplifier. This is the command to use to remotely power up the KPA500. No
response is sent from the KPA500 after receiving this command.

To turn it off you need the ^ON command:

^ON (Power Status & Off, GET/SET)
SET format: ^ON0; turns the KPA500 off.
RSP format: ^ONn; where n = 1. No response if off.
Note: if a ON; quickly follows a ON0; you _may_ see a ON0; response.
See the ‘P’ command in the BootLoader section for a serial command to turn on the KPA500.

Andy, k3wyc

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