[Elecraft] K3 not transmitting anymore

[Ralph Tyrrell]

I am using an Alinco DM-330M power supply. Across the output of the power supply I have a 26 AH battery. If the AC power quits I have many hours to shut down the K3. 

I have the output of the power supply set to 13.8 V. Should it be slightly higher? How much?

Sometimes I do not even turn on the power supply when I get on the air.
I keep looking for a power outage, less QRM, QRN.

73, Ty, W1TF (GA), K3 # 696