[Elecraft] New KPA500/KAT500 question

[Dave Cole (NK7Z)]

Don,

Thank you for helping, and thank you for indulging a newcomer to 
Elecraft hardware, beyond the K3/P3.

As you can imagine I am excited to get this connected up, but being very 
careful!  Hence the questions here, and thank you again!

To clarify what I have now:
I have a K3, (not S, with the RS-232 port, not USB), for external 
communications.

Can you expand on:

"There is no relationship between the K3 and P3 for considerations with 
the amplifier and ATU."

What does this mean exactly?

My assumption set:
I am expecting the K3 to provide some sort of signal, (other than RF 
into the amp, from the K3, in order to provide band switching 
signaling), in order for the KAT/KPA to know what band they are supposed 
to be on, and then switch to that band and tuning  solution.

Is that a correct assumption on my part, or in my case, (not a K3S), 
does the amp/tuner derive band information from the RF leaving the K3?

I bought used, and am unsure what the original owner had-- a K3 or K3S, 
so I may not have the correct cable set for a K3.  I will query the 
previous owner tomorrow about this.

I am also giving a lot of info here that may not be relevant, as I am 
assuming I know almost nothing about connecting this setup together, 
given I can't locate a cabling diagram for the entire setup I have.

Again, thank you for the assistance here...

73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
Award Manager, 30MDG Grid Awards
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon

On 2/16/19 5:26 PM, Don Wilhelm wrote:
> Dave,
> 
> Open the KAT500 manual to page 5 and see the cabling diagram depicted 
> there.
> 
> There is no relationship between the K3 and P3 for considerations with 
> the amplifier and ATU.
> 
> If you have a K3S - the P3 connects to the P3 with the RS232 connector 
> and not the ACC connector, so there is no conflict.
> 
> If you have the K3S or a K3 upgraded with the KIO3B, then download the 
> latest P3 manual and look at the cabling on page 5.  You will need the 
> CBLP3Y to connect it as shown there.
> 
> 73,
> Don W3FPR
> 
> 
> On 2/16/2019 7:51 PM, Dave Cole (NK7Z) wrote:
>> Hello,
>>
>> I have a K3, and a P3, connected to a computer.  I now have a KAT500, 
>> and a KPA500.
>>
>> I do not see a full cabling diagram for the entire setup.  Does one 
>> exist?  If so, where can I obtain it?
>>