[Elecraft] KPA500 Receives Keying Signal but does not XMT

[G4GNX]

Can we have a little more info please.

Do you have two 15pin cables, one from the K3 to the KAT500 and one from the KAT500 to the KPA500?

Are the cables genuine Elecraft E850463 Aux Interface Cables or are they VGA style cables (which won’t work)?

You should not need any other cables connected to the setup apart from power and RF.

Page 5 of the KAT500 user manual shows the correct cabling.

73,
Alan - G4GNX
South Coast UK
Elecraft K4D / KPA500 / KAT500 / IC-9700



> On 4 Dec 2023, at 23:18, Peter Iverson <pmiverson at att.net> wrote:
> 
> Here’s the problem: I’ve been successfully running a K3/KPA500/LDG AT-600ProII with no problems, usually USB and digital modes at about 400W out. I recently obtained a KAT500 and replaced the LDG tuner. I used the Elecraft 15-pin cables for full integration. The KPA500 follows the K3 when I switch bands, but when I go from STBY to OPER, the KPA500 shows no output. Neither SWR nor POWER led’s light up. I tried my original configuration with the LDG tuner but same problem occurs—KPA500 no output. I know the K3 is producing output because on STBY the LDG shows POWER and I’m making contacts barefoot. I’ve even tried the basic hookup with RCA cables but no joy. The KPA500 does show an asterisk in the left corner of the display when I key the K3 so it is receiving a keying signal. I’ve checked to make sure I have the latest firmware version and I’ve doubled checked to make sure that INHIB IN is DISABLED in the menu. I’m running the KPA500 on 240V mains. I’m hoping someone can help me solve this dilemma.
> 
> Pete
> KH6GK