[Elecraft] KRC2 with K3, KPA500 and MH MKII keyer

[Don Wilhelm]

Mike,

I don't understand the problem with Jack's solution.  The AUXBUS signal 
can be daisy-chained to the various units that need it.  The 15 pin Y 
cable provided by Elecraft will provide the capability to daisy-chain 
the signals needed.  For an example of similar connections, look at 
Figure 7 in the XV Transverter Owner''s manual.  The K2 box would be 
replaced by the K3 (with the Y cable attached), and the KAT100 in the 
diagram would be replaced by your KPA500.  The PC connection is not on 
the K3 ACC cable, but a separate RS-232 cable.
The KRC2 uses the same signals from the K3 as the XV transverters.

Apparently Jack has fabricated his own cable, and if true, he likely did 
not use the Y cable, but wired directly to the connectors.  Wait until 
Jack sends his cable diagram and then make your decision on how to wire 
the cable(s)

73,
Don W3FPR

On 9/1/2011 3:27 PM, Mike Fatchett W0MU wrote:
> Correct on the Aux bus.....However the Auxbus is accessed via the 15 pin
> Acc connector in the back, which the KPA500 and KRC2 all want access to.
>
> On 9/1/2011 1:09 PM, Jack Brindle wrote:
>> Mike;
>>
>> The best way for your use is to use the Auxbus connection. I have
>> tested it extensively while developing the KPA500 firmware and have
>> seen no problems with KRC2 operation with the K3 and KPA500.
>>
>> Your Aux cable needs to connect the Auxbus at all three pieces of
>> equipment. I have a diagram I can send you that shows the connections
>> in the cable I fabricated for my station. Look for that later this
>> evening.
>>
>> One thing of note - the MKII does not connect to the Auxbus. Only
>> Elecraft equipment uses that communications method.
>>
>> And, if I can find the time over the next few days, you will see a new
>> version of KRC2 firmware (V1.6) released next week. I am way too busy
>> these days...
>>
>> Jack Brindle, W6FB
>> Elecraft Engineering
>>