[Elecraft] Connecting a K2 to a KPA500

[Cady, Fred]

Hello Ariel,
Does the KPA500 show the same band that the K2 is on?  If not, try tapping your key to send a little RF to the amp when in operate mode so it can measure the frequency and switch in the correct band pass filters.
Cheers,
Fred KE7X
"The Elecraft K3: Design, Configuration, and Operation, 2nd Ed"
"The Elecraft KX3 -- Going for the Summit"
Coming soon: "The Elecraft KPA500 and KAT500"

-----Original Message-----
From: elecraft-bounces at mailman.qth.net [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Ariel Jacala
Sent: Friday, January 10, 2014 5:24 PM
To: elecraft reflector
Subject: [Elecraft] Connecting a K2 to a KPA500

Hi to the Elecraft Reflector

I just acquired a KPA500 and connected it to a K2.  I  have the output of the K2 connected to the input of the KPA500.  Things checked out through a dummy load in terms of loading the amplifier.  The KPA500 is then connected to a resonant antenna.  When on standby, I can hear signals through the antenna.  When I press operate - I can no longer hear the signals.

When I press the tune button on standby, the KPA500 does not measure  SWR.  Is this normal?  The KPA500 was previously operated with a K3 with the K3 cable to the KPA500.  I can key the KPA500 with the K2 and it produces expected power with the recommended drive levels.  I am worried about not hearing signals when in operate mode.

Do I need to update the firmware?  Why can't I hear signals from the antenna with the KPA500 in "operate"?  

Any help is appreciated.  

Thanks 

Ariel NY4G

Sent from my iPad
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