[Elecraft] K3 13.8 VDC power

[charlie carroll]

Dick:
Unless you are looking for something to do, I also suggest you are over
concerned.  During the recent CQWW CW on the island of St. Croix, we had
3 K3s all driving amps.  We probably had 3 or 4 outages without incident. 

Similarly, as a single op on the island of Montserrat during the last
ARRL SSB, I had a K3 barefoot.  Again, something like 3 or 4 power
outages during the contest.  No problems.

Once that 12 volts into the K3 reaches its lower limit, the radio's
off.  "Shutting down properly during a power interruption" might be a
different, and more difficult requirement, than just batter backup.

73 charlie, k1xx


On 12/22/2014 2:51 PM, Richard Fjeld wrote:
> Wow, thanks to all for the greatly informative answers.  I gleaned
> many good ideas from them.
>
> This is my concern; I am interested in protecting my K3 from damage by
> not being shut down properly should a power interruption occur while
> the K3 is operating. For this design, I'm thinking about a worst case
> scenario; in transmit mode at 100 watts/20 amps, plus accessories on.
>
> I am concerned about Hydrogen gas while charging a lead-acid battery
> here in the furnace room.  Since I don't need to operate by battery
> power,  I'd like to know your thoughts about if a Gel-Cel battery of a
> 9 amp variety would handle the 20 amp load until I could go to receive
> mode and properly shut down?
> I haven't had any experience drawing that much amperage from a gel-cel
> momentarily.  I don't know if the load voltage would be adequate to
> keep the K3 alive.  I'd need to test it using an older style radio. 
> I'm hoping someone has had experience related to this.
>
> Thanks in advance for comments,
>
> Dick, n0ce
>
>
> On 12/22/2014 1:31 AM, Richard Fjeld wrote:
>> Is anyone floating a battery across their power distribution?
>>
>> Dick, n0ce
>>
>>
>
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