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

[Joe Subich, W4TV]

Mike,

The simple solution is two of the Elecraft DB15 "Y" cables.  However,
microHAM only uses pins 1, 4, & 5 (FSK, PTT & ground) and provides a
"pigtail" for the Inhibit input if you need it (not likely with the
KPA-500).  It would certainly be practical to make a custom "Y" cable
to connect pins 2 & 5 (Aux bus/Ground) to pins 6 & 5 of the KRC-2 XCVR
jack and and pins 1,4, & 5 to the microHAM cable.

73,

    ... Joe, W4TV


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
>>
>> On Aug 31, 2011, at 7:28 PM, Mike Fatchett W0MU wrote:
>>
>>> KRC2 built.
>>>
>>> It appears there are a couple of ways to wire the KRC2 with the K3.  I
>>> have the KPA500 and am using the Aux bus so I think I should use the aux
>>> bus.  The KRC2 will be used to drive an ICE 419 Bandpass filter unit.
>>>
>>> I would appear that all I need to do is connect pin 6 on the KRC2 to pin
>>> 2 on the 15 pin connector and pin1  to pin 5.
>>>
>>> Why would one want to hook up using serial ports with or without
>>> logging?
>>>
>>> The entire setup will consist of a Microham MKII keyer or MK2R+ , K3,
>>> KPA500 and KRC2.  It would appear that I would need another 15 pin
>>> splitter to run the MKII, KPA500 and KRC2 all on the the Aux Bus.  I
>>> assume that the splitter that Electraft provided is 15 pins straight
>>> through?
>>>
>>> Mike W0MU
>>>
>>>
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