[Elecraft] Connecting a K2 to a KPA500

[Ariel Jacala]

Jack

The K2/100 RF output is connected to the KPA500 input.  The KPA500 output to the antenna.  I have the K2/100 RS232 cable made up to connect to a computer.  I made it up per the KPA100 manual.  I have not connected it to the KPA500.  

Ariel NY4G

Sent from my iPad

> On Jan 10, 2014, at 9:01 PM, "Jack Brindle" <jackbrindle at me.com> wrote:
> 
> That is very old firmware. You should go to the Elecraft web site, download the upgrade file (currently V1.33) and upgrade it ASAP.
> 
> Fred’s question was more asking if the KPA changed bands to the one the K2 was on when you send RF from the K2. If not, make sure you don’t have the RF connections reversed on the KPA.
> 
> The KPA will work with the K2 - that was tested during development.
> 
> Jack Brindle, W6FB
> 
>> On Jan 10, 2014, at 5:54 PM, Ariel Jacala <ny4g at hotmail.com> wrote:
>> 
>> The KPA500 does not see the K2 Band.  I do not have an RS232 connection just the coaxial cables.  Tapping the key does not do take the KPA out of transmit even though no longer putting out amplification.  
>> 
>> I ran through the menus
>> 
>> KPA500
>> Firmware is 1.11
>> SN 825
>> Radio set to Serial (instead of K3)
>> Everything else is default
>> 
>> K2
>> t-r to hold (per the KPA manual)
>> QSK delay 0.03
>> 
>> Per Lyle's comment - removing the key line enables receive while in operate.
>> 
>> Ariel NY4G
>> Sent from my iPad
>> 
>>> On Jan 10, 2014, at 8:24 PM, "Cady, Fred" <fcady at ece.montana.edu> wrote:
>>> 
>>> 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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