This depicts which pack is meant by the term “most negative.”
arms. This is a nice safety advantage.
Regardless of a BEC’s manufacturer,
check the ratings for output as related
to input voltage. The higher the
input voltage is, the lower the output
capacity will be. Even if it’s listed at up
to 12S or 20 amps, it doesn’t mean that
is the BEC’s continuous rating.
You can have one or the other, but
you can’t have both. This is another
reason that connecting the BEC to one
pack in the series is beneficial.
Never use two switching BEC units
in parallel to power your radio system.
If you need two to match the needs of
your system, they must be separated
from each other. Castle Creations
is working on a possible resolution
for this, but I don’t yet know of a
You can use an external BEC unit
as an adjustable voltage regulator to
power your Giant Scale radio systems
using a LiPo pack as the source.
If you have a large airplane using
servos that won’t tolerate the voltage
from a 2S LiPo pack, you can use a
BEC unit to step it down to usable
levels. It would be cheaper than
replacing all of your servos with HV-rated ones.
I’m outta here! Hope to see you in
Weak Signals Toledo R/C Expo
105 Model Aviation APRIL 2014