[Elecraft] KPA500 not responding to K3

[Jack Brindle]

Interesting.

I have a slightly different take. The two cables should be identical, with the same pins missing. If the cable is broken, as Don suggests, you would see very strange operation, but unless all the pins were broken, you would see something. the fact that you are seeing nothing tells me that there is an incompatible signal connected, probably the power-on signal. 

So, my suggestion. Use the cable with all pins intact between the KPA and K3. Use the other cable from the K3 to the KPA. That should work just fine.

Jack Brindle, W6FB

Sent from my iPad

> On May 2, 2014, at 8:08 AM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
> 
> I would suspect that there is some pin/wire in that KPA/KAT cable which is broken.  When used for your purposes between the K3 and the KAT500, it is not used, but is used for the KAT500 to KPA500 connection.  It may be wise to replace that cable at some point.  I would at least put a tag on it as a reminder that it is "flakey".
> 
> 73,
> Don W3FPR
> 
>> On 5/2/2014 9:49 AM, Ben Collins-Sussman wrote:
>> OK, new test results, followed by an inexplicable resolution to the problem!
>> 
>> I'm comparing the two elecraft-specific DB15 cables here, with the
>> suspicion that one of them is broken or defective.
>> 
>> 1.  *Physical observation*
>> 
>> The K3/KPA cable has all pins present.
>> The KPA/KAT cable has pins 1, 6, 7 missing.  But it looks deliberate, and
>> those pins are not used anyway (according to documentation.)
>> I do not see any bent pins on either cable.
> 
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