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Not designed as a QRP radio, your IC-706 draws as much current on
receive as many QRP radios do on transmit. Another important factor
is the display backlight. Measure the current with the backlight
turned on and then turned off and you will see that a lot of battery
life is consumed lighting the display, not operating the radio.
On 1/31/20 8:42 AM, Don, W9EBK wrote:
Based on what I'm seeing here about battery life
it's time for me to get some new batteries. I have only done 2
portable operations in the past few years with my Hilltopper 20
and Black and Decker battery. When I did more portable work a
7.5 amp hour gel cell would only run my IC-706 set to its lowest
power setting for about 90 minutes of typical operating. My 20
amp hour gel cell would go about 4 hours.
Looks like it's time to go shopping for
lithium batteries and maybe a more efficient radio.
On Thu, Jan 30, 2020, 12:52 PM
On Thu, Jan 30,
2020 at 11:28 AM, Don, W9EBK wrote:
You are going to need 30 to 40 amp hours to do
what you want, with no worries.
For an Argonaut IV or KX2, a 30Ah battery will last a couple
of weeks! For an afternoon's operating, see what other folks
who are running QRP on this thread have mentioned. I have an
old Hawker Cyclon cell (4Ah) and a couple of newish SLA
(4.5Ah), and in my busiest SOTA operating day I have never
drained them enough for the power to cut back on my KX3,