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Old 06-04-2007, 05:47 PM   #1
Loren Amelang
 
Default Re: Battery Enclosure Insulation?

On Sun, 13 Jul 2003 06:11:12 GMT, Richard P. <not@home.com> wrote:
....
> Also, has anyone experienced RFI (radio frequency interference) or noise
> with digitized sine wave inverters like the Xantrex SW line? Us ham
> radio
> operators hate radio noise. I've used a cheap 150 watt modified square
> wave
> inverter that plugs into the cigarette lighter and experienced horrible
> interference problems.


My older Trace SW-4024 has amazed me with how RF quiet it is. At various
times I have falsely accused it, but the issue has always turned out to be
some other DC-DC converter changing its noise pattern as the load on the
4024 changes the battery voltage. I've never confirmed a problem with the
big inverter, at MW/SW/VHF or FM/TV frequencies or with a meter. And I'm
well off-grid in "Northwest Nowhere", so even a little unwanted radiation
would be obvious. Of course Xantrex now has a lot more than just the
classic Trace design...

Loren
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Old 06-04-2007, 05:47 PM   #2
Steve Spence
 
Default Re: Battery Enclosure Insulation?

the dr series isn't so quiet.

--
Steve Spence
www.green-trust.org
"Richard P." <not@home.com> wrote in message
news:GuoQa.428560$ro6.10343742@news2.calgary.shaw. ca...
>
> "Loren Amelang" <loren@pacific.net> wrote in message
> newsprr9i69t3tvc9h7@news.pacific.net...
> > My older Trace SW-4024 has amazed me with how RF quiet it is. At various
> > times I have falsely accused it, but the issue has always turned out to

be
> > some other DC-DC converter changing its noise pattern as the load on the
> > 4024 changes the battery voltage

>
> Thanks for the input! I was thinking of getting a SW 4024 but I wanted to
> see if anyone had any thoughts about the RFI subject. My questions about
> RFI immunity and emmissions to the sales guys was met with a blank look on
> their face. (I guess I could have pestered Xantrex about it instead).
>
>
>



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Old 06-04-2007, 05:48 PM   #3
Steve Spence
 
Default Re: Battery Enclosure Insulation?

yep, that would be my experience as well.

the DR was designed for third world applications originally. they were named
after the Dominican Republic where they are used in many homes because the
electric company shuts down every night.

--
Steve Spence
www.green-trust.org
"Richard P." <not@home.com> wrote in message
news7NQa.463862$Vi5.12049430@news1.calgary.shaw. ca...
>
> "Steve Spence" <sspence@green-trust.org> wrote in a message
> > the dr series isn't so quiet.

>
> Funny you should mention that. I had a customer come into my store today
> and our conversation ended up about solar power (he has a home on

solar/wind
> power nearby) and we got into talking about modified wave vs. sine wave
> inverters. His past experience was somewhat negative about the DR series,
> but that he sold his and upgraded to a higher power SW series. He's been
> happy ever since. He said everything stopped humming and his clocks ran
> true. <chuckle>
>
>
>



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