Last evening I had an annoying problem with K3. It would stop transmitting any signal, even though the red xmit light was lit. The K3 was driving a 30L1 linear with about 45 watts, a pretty safe level, and no ALC connection. I had LP-BRIDGE running, with HRD, SDR_IF and the nice little S-meter display application running. SDR_IF links direct to HRD.
I was running PTT mode, keying with the XMIT button. I would talk for about 30 seconds, and the signal would just quit. Happened many times, to the point I took the rig offline. Each time, the red light still glowing. Pressing XMIT twice to toggle PTT off/on would get my signal back. But the same symptom would recur a bit later. I'd been running the K3+30L1 and HRD (no LP-BRIDGE) earlier in evening for about an hour in the same PTT fashion, so I know that setup worked FB. I will do some further experimentation, but I suspect that there might have been too heavy a load on the serial interface, causing some Ucode confusion in K3. The serial setup is using the Elecraft supplied USB-serial adapter cable, at 38Kbaud. Any thoughts ? TNX -- Tom W6TJK
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