[AMRadio] Modified sine wave to sine wave

Tue May 1 10:11:06 EDT 2012

I have a modified sinewave inverter.  I want to get rid of some of the high
frequency noise in the AC.  It occured to me that running the output
through a 1:1 transformer with a capacitor across the primary might smooth
out the bumps.  Any comments?

Jim Isbell
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On Mon, Apr 30, 2012 at 10:51 PM, Geoff <w5omr at att.net> wrote:

> On 4/29/2012 10:48 AM, kc9cdt at aol.com wrote:
> > Geoff,
> > Thanks for all the help.
> > Well,
> > I guess I can meter the primary of the Mod XFMR...if it's open that
> > should be obvious.
>
> Well, either open or shorted.  Come to think of it, a shorted
> transformer would cause a much higher current reading.  Make sense?
>
> > OK, I have a handle on a old Viking II...is the mod XFMR the same...if
> > it is, I can get it cheap.
>
> The Interstage audio Driver transformer, I believe, is the same in the
> Ranger and the Viking II.
> Neither of 'em are much bigger'n a walnut (so it seems)
>
> > Maybe I should adj the resistor just to see if it helps?
> > If the resister is open...would that cause the high current?
> >
>
> The sliding tap resistor is what sets the screen voltage.
> Be very careful when sliding that tap... best to remove all stress from
> the 'slider' and don't slide it at all, rather open it up, place it
> where you want it, then re-secure it and measure.
>
> -Geoff/W5OMR
>
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