[Elecraft] KPA1500 goes into firmware load

[Gary Johnson]

We have a K3 and KPA1500 at a remote site. The KPA has 240V applied to it all the time, and actually turns on with the K3 via the Aux Bus. We use the remote control application via Ethernet. Works great. Occasionally, the amp won’t turn on, and when we investigate, it’s in the firmware load state. The KPA1500 Utility is then able to reload it via USB, and we’re operational again. Nothing on the computer should be accessing its USB port to cause it to go into that state. I have noticed that if we cycle the 240V power, sometimes that will put it in firmware load as well. Is there a common cause here?

-Gary NA6O