KPA500 and K2

[George Cortez Jr]

Hi folks
was reading the manual and it says that the auxbus from the kpa500 is
not compatible with the k2.
What is the difference between the K2 and K3 to make them incompatible?
What functionality is lost from not having the radio in the data loop...
Thanks

George NE2I


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[Iain MacDonnell - N6ML-2]

On Wed, Apr 6, 2011 at 6:05 PM, George <[hidden email]> wrote:
> Hi folks
> was reading the manual and it says that the auxbus from the kpa500 is
> not compatible with the k2.
> What is the difference between the K2 and K3 to make them incompatible?
> What functionality is lost from not having the radio in the data loop...

Page 11 of the manual answers this... it allows the K3 (only) to
automatically adjust its output power when the KPA500 is active, and
KPA500 fault conditions are reported to the K3 (although I don't know
what the K3 does about it!).

You'll be able to drive the KPA500 with a K2 without AUXBUS ... you'll
just have to manually adjust the drive level appropriately.

    ~iain / N6ML
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[Jack Brindle]

The KPA500 uses new Auxbus commands and is one-way only (KPA500 to  
K3). The K2 does not know about the KPA500 commands and cannot  
understand them. There will be a new release of the K3 firmware to  
support these features about the time the KPA500 starts shipping.

The K2 will work with the KPA500 just fine. This is a case where the  
best way to connect them would be to connect Key out from the K2 to  
the KPA500, and RF Out from the K2 to the KPA500's RF Input. The  
KPA500 detected bands and switches incredibly fast (you have to  
experience it to understand how fast), so you don't actually need  
anything else. This is also true for all other transceivers and even  
the K3 itself.

So why would you want to connect the KPA to the K3 with the special  
cable? The new support features that Wayne has added to the K3 will  
make you wonder how you lived without them.

Jack Brindle, W6FB

On Apr 6, 2011, at 11:05 AM, George wrote:

> Hi folks
> was reading the manual and it says that the auxbus from the kpa500 is
> not compatible with the k2.
> What is the difference between the K2 and K3 to make them  
> incompatible?
> What functionality is lost from not having the radio in the data  
> loop...
> Thanks
>
> George NE2I
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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