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powering equipment overnight in the field

Subject: powering equipment overnight in the field
From: "Russ Wigh"
Date: Mon Jul 22, 2019 8:32 am ((PDT))
Hello all
I am trying to calculate what I need to do screech-owl surveys this fall.
The equipment would usually be left overnight at dusk and picked up early
the next morning.  Since the recorders will be running at night, powering
with solar is out, of course.  For one of three units, the 722 with a
NP-F970 Sony lithium battery, I will set the internal recording timer and
there will be no need for external power since it will run most of the
night anyway.

The other two recorders are an Olympus LS-10 (expropriated back from my
granddaughter) and a Zoom Hn4. I envisioned small lead acid batteries
connected to pure sine inverters, and Intermatic timers to shut the
recorders down. But all the reviews I have read on Amazon and B&H have
enough negatives to convince me that these Chinese-made products are a
crapshoot. Clearly I do not want to spend an arm and a leg on this stuff,
since it is not likely to have much future use. To wit, if anyone has some
knowledge, experience or even a considered opinion for a solution, I would
much appreciate it.

Russ Wigh
Skidaway Island, Georgia.





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