[Elecraft] [KPA500] Rear power switch thread

[Wayne Burdick]

The K3 (like the K2 and our other rigs) uses EEPROM for nonvolatile  
parameter storage. This decision was based on several criteria, and we  
believe it was the right choice at the time. It's conceivable that in  
a future product we might go with battery-backed-up RAM.

The MCU does try to write all changed parameters to EEPROM in the  
event of power disappearing suddenly; the electrolytic capacitors do  
hold up the MCU's voltage for some milliseconds. But your humble  
firmware guy is a lot happier when power is turned off at the radio  
first, allowing a clean shut-down sequence.

Thanks for your tolerance of our various idiosyncrasies.

73,
Wayne
N6KR