<html>
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<p>I have nearly completely gone to LED. I find that lights with
CREE devices in them are pretty quiet.</p>
<p>73,Jim</p>
<p><a class="moz-txt-link-abbreviated" href="mailto:wb4gcs@amsat.org">wb4gcs@amsat.org</a></p>
<p><br>
</p>
<br>
<div class="moz-cite-prefix">On 11/20/2016 11:37 AM,
<a class="moz-txt-link-abbreviated" href="mailto:noskosteve@yahoo.com">noskosteve@yahoo.com</a> wrote:<br>
</div>
<blockquote
cite="mid:7u77ru51pstohsdcy8jmaq0y.1479659251178@email.android.com"
type="cite"><span style="font-family: Arial; font-size:12pt">While
this is a little OT, the LED transition is happening much faster
than residential solar PV and they are very good garbage
generators. Even if they pass Part 15 (individually), they'll be
hundreds in your neighborhood.<br>
I have an 8w desk lamp that generates more RF noise when it is
off than on (soft switched).<br>
Just sayin'.<br>
<br>
Regards, Steve Noskowicz K9DCI <br>
Science & Technical Advisor<br>
challengerillinois.org<br>
From my tablet.</span><span style="font-family: Arial;"><br>
<br>
-------- Original Message --------<br>
From:KF4LVZ <aprssigzbr6@acarver.net><br>
Sent:Fri, 18 Nov 2016 22:59:23 -0700<br>
<a class="moz-txt-link-abbreviated" href="mailto:To:aprssig@tapr.org">To:aprssig@tapr.org</a><br>
Subject:Re: [aprssig] FW: Solar Ham Radio Interference<br>
<br>
</aprssigzbr6@acarver.net></span>You can't use string inverters
on an array that receives partial shade<br>
otherwise your array efficiency will be lower.<br>
<br>
On 2016-11-18 17:11, Robert Bruninga wrote:<br>
> NEW ISSUE:<br>
> <br>
> Previously QST and my emails discussed the rise in the noise
floor from home<br>
> solar and my suggestions to avoid purchasing a system with
micro-invrters or<br>
> elecronic "optimizers" on every panel on the roof, and stick
with the<br>
> wuieter or easier-to-fix all DC wiring and central inverters.<br>
> <br>
> THAT’S NOT ALL! It was pointed out at the ARISS meeting this
weekend that<br>
> one must also watch out for their NEIGHBORS! That is, if you
want to keep<br>
> your clean noise floor for your own hamming and your own
solar, you must<br>
> also be vigilant of your surrounding neighbors.<br>
> <br>
> The time to make friends so you can guide their future
investment is NOW,<br>
> well in advance before they make an irreversible decision.<br>
> <br>
> Ill try to remember to go out and see how far the noise
radiates from some<br>
> of the other solar panels in my neighborhood. Although my DC
system with<br>
> central inverters is much quieter, I should go out and see
how far beyond<br>
> these houses, the various system's interference can be
detected.<br>
> <br>
> Bob, Wb4APR<br>
> <br>
> -----Original Message-----<br>
> From: Robert Bruninga [<a class="moz-txt-link-freetext" href="mailto:bruninga@usna.edu">mailto:bruninga@usna.edu</a>]<br>
> Sent: Sunday, October 23, 2016 12:55 PM<br>
> To: Amsat BB<br>
> Cc: <a class="moz-txt-link-abbreviated" href="mailto:bruninga@usna.edu">bruninga@usna.edu</a><br>
> Subject: Solar Ham Radio Interference<br>
> <br>
> Not Satellite related, but people often ask about any RFI
from my solar<br>
> arrays at home. Interest stems from an RFI issue in April QST
and my letter<br>
> in Sept 2016 QST.<br>
> <br>
> Well, FINALLY, the jury is in. For the first time since
installing solar, I<br>
> finally got all my full-sized dipoles up in the air again.
And listened with<br>
> the arrays on and off.<br>
> <br>
> Yes, I have inverter noise about 12 dB above the noise floor
every 38 kHz on<br>
> 80 meters,. But couldn't really find anything on 20 meters. I
did not do a<br>
> thorough search, but enough to finally say, "yes, there is
some noise..."<br>
> <br>
> I post this because my 16kw of arrays are conventional series
string arrays<br>
> and much quieter than the "optimizers" on every panel all
over the roof<br>
> noted in the April QST article. I always thought my string
array was quiet,<br>
> but now I have some data noted above. This could easily be
fixed with some<br>
> clamp-on ferrites down in the basement on the wires going
into the<br>
> inverters...<br>
> <br>
> But for my rare HF operating, the solar AC disconnect switch
is about 3 feet<br>
> from the kitchen door. Easy enough to pull if I want HF
silence. I could<br>
> also install a 40 amp disconnect relay from a switch in the
shack... But<br>
> with my rare operating style, I'll probably do nothing. Of
course it is<br>
> perfectly quiet at night ;-)<br>
> <br>
> It took me 6 years to get around to this test, so don't hold
your breath<br>
> waiting for me to add some clamp-on filters to the inverter
wires and see<br>
> what that does.<br>
> <br>
> For those into solar, come join us on
<a class="moz-txt-link-abbreviated" href="mailto:SolarDIY@yahoogroups.com">SolarDIY@yahoogroups.com</a> Bob, WB4APR<br>
<br>
_______________________________________________<br>
aprssig mailing list<br>
<a class="moz-txt-link-abbreviated" href="mailto:aprssig@tapr.org">aprssig@tapr.org</a><br>
<a class="moz-txt-link-freetext" href="http://www.tapr.org/mailman/listinfo/aprssig">http://www.tapr.org/mailman/listinfo/aprssig</a><br>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
aprssig mailing list
<a class="moz-txt-link-abbreviated" href="mailto:aprssig@tapr.org">aprssig@tapr.org</a>
<a class="moz-txt-link-freetext" href="http://www.tapr.org/mailman/listinfo/aprssig">http://www.tapr.org/mailman/listinfo/aprssig</a>
</pre>
</blockquote>
<br>
<br /><br />
<hr style='border:none; color:#909090; background-color:#B0B0B0; height: 1px; width: 99%;' />
<table style='border-collapse:collapse;border:none;'>
<tr>
<td style='border:none;padding:0px 15px 0px 8px'>
<a href="https://www.avast.com/antivirus">
<img border=0 src="http://static.avast.com/emails/avast-mail-stamp.png" alt="Avast logo" />
</a>
</td>
<td>
<p style='color:#3d4d5a; font-family:"Calibri","Verdana","Arial","Helvetica"; font-size:12pt;'>
This email has been checked for viruses by Avast antivirus software.
<br><a href="https://www.avast.com/antivirus">www.avast.com</a>
</p>
</td>
</tr>
</table>
<br />
</body>
</html>