[Elecraft] K2 + KPA100/EC2 Backup Battery Power?

Darrell Bellerive va7to at rac.ca
Fri Jun 3 11:12:58 EDT 2005


I am wondering about backup power for a K2 based station.

The configuration would be a K2 with KBT2 and a KPA100 built into an EC2.

One AC Powered 24 amp continuous/30 amp maximum power supply running both plus 
a few minor station accessories.

If the AC mains fails will the KBT2 continue to power the K2 at QRP levels? 
From reading the mailing list archives and looking at the schematics this 
seems to be the case, but just wanted to check to see if this was indeed the 
case.

I would like to set the power supply voltage to about 14.2 volts or so to keep 
the proper float voltage on the KBT2 battery. I assume that the higher 
voltage will not be a factor for the KPA100. Am I correct?

Lastly, I would like to power the few station accessories from the KBT2 
battery to keep them running in the event of a AC mains power outage. They 
are low current devices so they shouldn't impact the battery much. I would 
also like them switched on and off with the K2 front panel power switch. Is 
there a convenient place in a K2 to pull off the switched 12 volts and feed 
it to a rear panel connector?

TIA and 73,
Darrell

-- 
Darrell Bellerive
Amateur Radio Stations: VA7TO, VE7CLA
Grand Forks, British Columbia, Canada


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