[Elecraft] [KPA500] Rear power switch thread

[Wayne Burdick]

Hi Don,

If we did decide to use battery-backed up RAM in a product, it would  
be shadowed by an EEPROM, and both would be checksummed to ensure fail- 
safe operation. That seemed like overkill in 2007 when we were  
finalizing the parameter storage implementation for the K3.

Wayne
N6KR


On Dec 1, 2011, at 4:07 PM, Don Wilhelm wrote:

> Are we going "full circle"?  Battery backed RAM was the "thing" when  
> the IBM PC was announced (way back when), and then as technology  
> progressed, that changed to EEPROM which did not require voltage to  
> retain the settings.  I hope we are not going back to that voltage  
> dependent situation for the K3.  As I recall from the IBM computer  
> example, if the data was something different than the currently  
> displayed frequency, it might be lost with the power outage example.