[Elecraft] OT: RF noise in solar photovoltaic system
Tom Azlin W7SUA
tom at nilza.org
Wed Jul 20 10:20:52 EDT 2016
Hi Jim,
On 7/19/2016 12:51 PM, Jim Brown wrote:
> Remember that whether or not you hear more noise with the system running
> will depend on how much OTHER noise there is in your neighborhood. Some
> (many?) of us have background noise in the range of S8, others in the
> range of S3. The difference is 25 dB.
Good point. When not in Monsoon season my K3 S meter is around S2 with
my 160 meter inverted V up about 50 ft with about 150 ft of RG8 type
coax. Right now jumps up much higher during static crashes but storms
all around us. We live in a rural area long way from high voltage power
lines and perhaps from plasma TVs and electric fences.
> It's worth looking for a quiet MPPT charge regulator. Just like any
> other electronics that generate or use square waves, it can be done well
> or it can be done badly. Since badly is cheaper, and done well requires
> more technical design expertise, badly is by far the most common. The
> Genasun regulators are pretty quiet, but so far, they only make units
> for much smaller systems.
I'll keep looking for quiet MPPT charge controllers. My battery bank is
1200 amp-hr at 12 volts. Thanks!
73, tom w7sua
>
> 73, Jim K9YC
>
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