[Elecraft] K2: CAT control of K2/100 with HRD

[Don Wilhelm]

  Steve,

It seems you have done everything right, and have a hardware failure on 
your hands.

Since you have not used the RS-232 port before - it is possible that it 
did not work when the KPA100 was first built.

The first thing to check is continuity for RFC6, RFC7, and RFC8 on the 
KPA100 board (near the DE-9 connector).  It is also possible that U4 on 
the KPA100 board has been damaged.

Yes, all the modifications for the serial port are included on any K2 
control board SN 3000 and above.  If you have a wire on Control Board P4 
pin 1, that indicates that the wiring change was incorrectly applied to 
your Control Board, and should be backed off - in that case you will 
have to find what trace was really cut (it was not the trace going to 
pin 25) and repair that cut with a point to point wire.

73,
Don W3FPR

On 4/18/2011 12:14 PM, Stephen Victor wrote:
>
> Hi
> My K2/100 has been functioning well, and I am now trying for the first time to
> use the connection on the 100W amplifier unit for CAT control with Ham Radio
> Deluxe.   The K2 is serial number 6679, so apparently no modifications are
> needed.  The side-tone works.  I fashioned the cable as per instructions (and
> there is continuity where there should be), turned on the "port" function on the
> K2, set the baud rate on HRD to 48,000.   However, the HRD is unable to read the
> frequency.
>
> Am I missing something obvious?  Is some driver needed, or some further
> modification to the K2 or amplifier circuitry?
>
> Thanks and 73
> Steve WA2DTW
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