[Elecraft] "Bat Err" on KX3 - follow-up

[Jim Brown]

On 4/1/2018 10:33 AM, Nr4c wrote:
> Drop in 8 “Copper Tops” and enjoy the radio today!

Yep. The KX3 is also highly compatible with external battery packs, 
something as simple as six AAs in a holder that plugs into the power jack.

LiFePO4 packs sold by Bioennopower have also become quite popular. They 
come in a wide range of sizes/capacities, and are much lighter weight 
for the capacity they provide. For all day 100w operationat a rare 
mountaintop 6M grid that is in deep shade and requires a 3 mile hike up 
a 1,000 ft trail, several of us have bought 20Ah batteries, cost about 
$200 and weighs 5.5#. Much smaller packs are available. A 3 Ah pack 
costs $50 and weighs 13 oz.

Remember that the KX3 draws less current for the same power output when 
run from a higher DC voltage, and LiFePO4 batteries provide 13-14V for 
most of their discharge curve.

73, Jim K9YC