Posted by
Bill Frantz on
Apr 26, 2016; 12:23am
URL: http://elecraft.85.s1.nabble.com/KX3-Suggested-External-Battery-tp7616683p7616689.html
Almost any power supply capable of 9 to 15 volts at 2-4 amps.
Any family of batteries in that range will work. I use AGM lead
acid batteries for field day. I have a lithium family battery
for backpacking.
To calculate how much capacity (amp-hours) you need, measure the
current draw on receive and transmit. Then figure out what your
transmit/receive duty cycle will be and the time you will be
operating to calculate the number of amp-hours you will need.
Then double that because batteries don't like to be drained dead
and you need a margin of safety.
73 Bill AE6JV
On 4/25/16 at 4:57 PM,
[hidden email] (TFJM via
Elecraft) wrote:
>I'm sure this question has been asked many times. I recently bought a KX3 so
>I'm new at QRP and I'm about to head to a camp ground in a few weeks and go
>portable. Besides using internal batteries, what longer lasting external
>batteries are recommended? I hear of Lipo batteries and a slew of others.
>I'm just trying to navigate though the maze of options.
>
>Any and all feedback would be welcome.
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