On Fri, Sep 13, 2024 at 02:44 PM, Shirley Dulcey KE1L wrote:
ou will need some way to reduce the voltage from a typical lead-acid or LFP battery, a series diode or three is one way to do it. You can also use a four cell lithium (not LFP) battery, which will be safe but produce less output because its peak voltage will only be about 11V. If you use a bench supply, turn the output down to 12V rather than the more typical 13.8V.
A 4S LiPo is 16.8V at full charge!? ?You need a bunch of diodes as even after
near 80% discharge it will be 12.8!!!? ?
If LFE then14.2 at full charge.
?
8 NiMh might be a better fit for Q-X radios.? thats about 2.2ah and
12V full charge and 9V near dead.
?
I use a boost/buck for 12V or 13.8 (two different units).? The 12V is for a
computer (MiniATX) and 12V is the preferred voltage.? For for radios
most I have are standard to 13.8V so I use that unit.? The efficiency is
better than diodes and it keeps the output voltage very constant.
?
Those are Drok (10A units) in the aluminum finned cases and I've
had little issue with noise.? Likely overkill for many things.? There
are smaller 3A and 5A versions.
?
By doing that I can use anything from 8 to 28V as a source to get to?
what I desire.
?
--
Allison
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