Author Topic: K3 with K3/0  (Read 35 times)

nk8o

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K3 with K3/0
« on: 2025-10-31, 19:49:51 »
I recently acquired a K3 and was subsequently given a K3/0 to pair with it.  I can't seem to get them to communicate.  I know from previous experimentation that the K3 can be started remotely, and that my RemoteRig boxes can send CW to the radio and receive audio back from the radio.  I have double-checked all my cables to be sure they are correct, and I have double-checked the settings for the RR boxes.  Here is what I have noted:

1. These are RR Mark II revision 6. SN 5096 on the radio side and SN 5170 on the control side.  In configuring these, I cannot find JMP5 in either of these units.  Is this version compatible with the K3 Twin configuration, and is there something I can configure to this jumper?

2. If I turn on the radio, the RR boxes still send audio to each other, but I have to control with the K3/0 over frequency, mode, or other parameters  Anyone have any suggestions as to where to look?

These RR boxes were updated with v2.95 firmware and bootloader 1.10.

73

Charles - NK8O


nk8o

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Re: K3 with K3/0
« Reply #1 on: 2025-11-01, 15:22:27 »
Things I can report: 1) Version 6 boards work with the K3 Twin configuration.  There is no JMP5 on these boards but it doesn't seem to make any difference.  2) Small configuration errors keep it from working.  I discovered one setting that was incorrect, then the system came to life.  3) be careful if you "roll your own" DB15 cable.  Remember in a standard configuration of an RJ45 that pins 4 and 5 are blue and blue stripe, opposite of all the other pairs.   If you are crimping your own RJ45 you can set it up any way you like, but the standard "B" configuration has the blue pair reversed.

I will start rigorously testing this setup today, everything except the mic.   I don't work SSB as a general rule.

Thanks for the bandwidth.  Sometimes laying out the problem leads to a solution.

73

Charles - NK8O