I have a 12V standalone audio amplifier (Lepai LP-2020A+) for my cockpit
speakers. During the day when my solar
array is charging
there is an annoying buzz coming from the speakers thats independent of the volume setting. I tried putting a choke from a car stereo in series, but it didn't help.
Anyone know what I can do to clean up the 12V leg? I'm hesitant to simply add capacitance because I have a pretty complicated charging
system (2 engines, 2 solar
arrays, and a turbine) and I'm worried that if I change the impedance of the house load significantly it may mess something up.
Worst case I'll use a LDO regulator
, but I was kind of hoping I could get something off-the-shelf instead of having to engineer
something (I'd need to step up the 12V before I use the LDO to avoid dropout).