[FARC] Looking for a scope

[Jeff Fishman]

Mark,
My friend actually lives in Hagerstown, so the RFI wouldn't be a factor for
me! He became aware of the "wave" issue when an electric clock began gaining
about two minutes a day. Modern inverters produce a much "closer to sine"
wave but still not perfect. Will we need a special probe to measure line AC?
Jeff

-----Original Message-----
From: FARC [mailto:farc-bounces at mailman.qth.net] On Behalf Of Mark Whitmore
Sent: Tuesday, May 31, 2016 4:18 PM
To: Frederick, Maryland ARC
Subject: Re: [FARC] Looking for a scope

Jeff,

I have a Tektronics 465 that you are welcome to borrow.  I would also like
to know what the inverter output looks like.  I am pretty sure it is NOT
going to be a sine wave.  
The ones I have seen are called
"modified sine wave" and have about 33% third harmonic content.  It looks
like a central rectangle with a shorter rectangle on each side followed by
the inverse (negative) of this. There are essentially six chunks of voltage
with an RMS value of 120.  Don't think they bother to shape the edges since
this would result in more dissipation in the transistors.  I would also be
willing to bet that there are no requirements to limit electromagnetic
radiation from either the solar array or the house 
wiring.   Have you turned on your radio
since the neighbor went solar?

Mark

On 5/31/2016 11:19 AM, Jeff Fishman wrote:
> Does anyone have an oscilloscope I can borrow for a few days? A friend of
> mine just had a solar system installed at his home, and I'd like to see
how
> clean the AC wave really is before I take the leap.
>
>   
>
> Thanks.
>
>   
>
> Jeff KB3FIO
>
> ______________________________________________________________
> FARC mailing list
> Home: http://mailman.qth.net/mailman/listinfo/farc
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:FARC at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

______________________________________________________________
FARC mailing list
Home: http://mailman.qth.net/mailman/listinfo/farc
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:FARC at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html