Elecraft K3-Remote Owner's Manual - Manual (Page 21)

21
VOX Operation
The only difference in operating VOX thru the RRC-1258 is both RRC-1258 devices must be configured to
allow VOX operation. For VOX to work correctly you must modify two settings under “Advanced Settings”.
Set RTP tx mode to Continuous. Also set Full Duplex to Yes. Enabling these options does increase the
bandwidth requirements for remote operation.
Using a Remote Site KPA500 from the Control Site
A KPA500 can be controlled through the remote site K3 with a simple cable modification, assigning a small
macro to the K3 and setting the KPA500 menu so the amplifier turns on in operate mode.
The remote site KPA500 power then may be turned on and off from the control site K3 or K3/0 by pressing the
assigned function switch. Since the KPA500 is all solid state, there is no warm-up period required so turning it
off is equivalent to putting the amplifier in standby. Power faults are indicated on the control site K3 or K3/0
display. Power faults are cleared by reducing the drive from the K3 prevent reoccurrence and then switching
power to the KPA500 off , then on again.
NOTE: If the K3 is equipped with a PR6 that is switched on only when the 6 meter band is selected using the
DIGOUT1 signal from the K3 ACC connector, that function must be removed as described in your PR6
Owner’s manual. The PR6 can be left powered on at all times as long as the K3 RX ANT connectors are not
needed on any other bands.
K3 to KPA500 Cable Modification
The K3 ACC to KPA500 AUX cable described in your KPA500 Owner’s Manual under K3 Enhanced Cabling
is required so the KPA500 at the remote site can report its status to the K3 at the remote site and on to the
control site K3, K3/0 or K3/0-Mini. However, one more wire than shown under Elecraft K3 Cable Connections
in the manual is required to control power on and power off. Add a wire that connects pin 11 on the K3 ACC
connector to pin 8 on the KPA500 AUX connector.
KPA500 Menu Setting
Use the KPA500 MENU to change the PWR--ON parameter to OPER so the KPA500 turns on in operating
mode.
K3 Macro
Use the K3 Utility program to assign the following macro to a K3 function switch:
MN019;MP001;MN255;MN019;MP000;MN255