[RE-wrenches] Sound Equipment Inverter

[Jerry Shafer]

Wrenches
I have built solar powered sound stages, power trailers for both music and
drive in movies, l only use outback, never any complaints, some acts prefer
over dirty grid power. I had sunpower positive grounded arrays, AC-DC
Coupled arrays. I had a guy use SMA and had all kinds of issues, mainly
operator error. We did a full trailer, green room and light bars, powered
drop down doors, but it was a little big.
Jerry

On Thu, Oct 22, 2020, 3:42 PM Ray <ray at solarray.com> wrote:

> Hi All;
>
> I've just had an inquiry on building a portable sound stage and
> recording setup.  Traditionally we've always used Exeltech, as they've
> had the cleanest output, with background buzz on tube amps being lower
> than grid power.  Modsine were horrible, Old Trace SWs were pretty
> intolerable, Magnum's were usable, but still noticeably more buzz than
> grid.  I think THD is roughly associated with the background buzz, but
> there might be certain harmonics that are particularly problematic.  I
> haven't gotten into looking at the separate harmonics relative to what
> induces the most noise in these old vacuum tube circuits.
>
> This is a 48 v application that also needs a built in charger with
> transfer switching.  Exeltech does not appear to have anything in that
> department.  Any other choices?  How are Samlex?
>
> As always, thanks in advance for your time and expertise,
>
> --
> Ray Walters
> Remote Solar
> 303 505-8760
>
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