It will be very interesting to see the results of your tests Ed... You
guys do good work, thanks for your efforts in all of this...
--
73's, and thanks,
Dave
For software/hardware reviews see:
http://www.nk7z.net
For MixW support see:
https://groups.yahoo.com/neo/groups/mixw/info
For SSTV help see:
http://groups.yahoo.com/neo/groups/MM-SSTV/info
On Mon, 2016-02-01 at 17:08 +0000, Hare, Ed W1RFI wrote:
> I have seen filters for both the load and lamp side, so you may need
> to try both. I had thought it was on the Hydrofarm site, but I don't
> see the load and lamp filters listed. I think I ordered some, so I
> will see when they come in.
>
> If I can get both load and lamp filters, the ARRL Lab would love to
> have someone install both filters and report on the results. If you
> have a cooperative neighbor, let me know and we will buy a couple of
> filters and let you try them.
>
> I'd also like reports on any model numbers, sources, etc., of
> products that cause bad interference. This post described a model
> that seems to be pretty clean, and that's very helpful, too.
>
>
> 73, Ed Hare, W1RFI
> ARRL Laboratory Manager
> 225 Main St.
> Newington, CT 06111
> Tel: (860) 594-0318
> Fax: (860) 594-0259
> Email: W1RFI@arrl.org
> Member: IEEE Connecticut Section
> Member: IEEE EMC Society, Board of Directors
> Member: IEEE EMC Society Standards Development and Education
> Committee
> Member: University of Hartford Industry Advisory Committee
> Primary representative: ANSI ASC C63 EMC Committee, Vice Chair
> Subcommittee 5 (Immunity)
> Member: QRP Amateur Radio Club International, Board of Directors
>
>
>
>
>
> -----Original Message-----
> From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of Dave Cole
> Sent: Monday, February 01, 2016 8:09 AM
> To: rfi@contesting.com
> Subject: Re: [RFI] Galaxy Grow Light Ballast Update
>
> Larry,
> Thank you so much for this information. I will suggest our local
> grow suppliers use these lights...
> --
> 73's, and thanks,
> Dave
>
> For software/hardware reviews see:
> http://www.nk7z.net
>
> For MixW support see:
> https://groups.yahoo.com/neo/groups/mixw/info
>
> For SSTV help see:
> http://groups.yahoo.com/neo/groups/MM-SSTV/info
>
>
>
> On Mon, 2016-02-01 at 06:46 -0600, Larry Burke wrote:
> > W0IVJ's recent post to this reflector coincidently provided links
> > to
> > products I was in the process of installing here. I promised an
> > update
> > after I had a chance to try these products in the field.
> >
> >
> >
> > Several weeks ago the neighbors across the street, who are about
> > 750
> > feet from most of my antennas, installed a 1000 watt HPS grow light
> > in
> > their greenhouse. This thing fired up about an hour before my
> > sunrise
> > and shut down about an hour after my sunset. It tore up 160, 80 and
> > 60
> > meters.
> > As it
> > warmed up you could watch a wide band of S9 noise travel across
> > the
> > spectrum scope trying to decide on the multiple places it wanted
> > to
> > land for the day.
> > The ballast was a no-name import designed by Satan himself.
> >
> >
> >
> > I had heard good things about the "Revolution Ballast EMI Filter"
> > available
> > from Hydrofarm so I elected to try that first. I didn't want the
> > increased liability of installing a homebrew filter on someone
> > else's
> > property, so a commercially available filter looked like a great
> > option. The filter attaches to the lamp (load) side of the ballast
> > and
> > does not provide any filtering on the AC input side.
> > Unfortunately,
> > this filter did not reduce the noise from this particular
> > installation
> > by any significant amount.
> >
> >
> >
> > The more expensive option was to offer to replace the offending
> > ballast.
> > While it was not my responsibility to do so, it was far and away
> > the
> > most expedient and effective way to handle the issue. After a bit
> > of
> > digging around I found the "Galaxy Grow Amp Model 902220". I
> > purchased
> > it from a local vendor who offered to take it back if it did not
> > solve
> > my problem.
> > These are also available from online sources for far less than the
> > MSRP shown in the link below. Galaxy advertising touts "ultra low
> > RFI
> > broadband emissions" and several vendors recommend these to
> > growers
> > who would like to minimize an RF signature recognizable by law
> > enforcement. There's an emissions test report by a third-party lab
> > posted on the Galaxy website.
> > Galaxy maintains the following: "All Galaxy brand electronic
> > ballasts
> > legitimately pass FCC Article 18 Part B standards. This standard
> > allows for much less radio frequency & electromagnetic
> > interference
> > than Part A.
> > (277
> > volt Galaxy ballasts are tested to Part A commercial standard).
> > Part B
> > level certification confirms FCC compliance not only for
> > commercial
> > applications, but for residential as well."
> >
> >
> >
> > Keep in mind I am a fair distance from the source, but when
> > compared
> > to the original installation the improvement with the Galaxy
> > ballast
> > is remarkable.
> > The new ballast was installed without the "Revolution Ballast EMI
> > Filter", by the way.
> >
> >
> >
> > I should point out that the neighbor was very cooperative and gave
> > me
> > total access to his greenhouse (veggies and house plants, for
> > those
> > wondering).
> > It's a good thing the problem was resolved when it was. They are
> > thinking about building a bigger greenhouse and indicated they
> > would
> > use the Galaxy ballast if and when they buy additional grow lamps.
> > Had
> > I not intervened there may have been several more of Satan's toys
> > to
> > deal with.
> >
> >
> >
> > Hope this helps someone in a similar situation. As always, Your
> > Mileage May Vary.
> >
> >
> >
> > Links:
> >
> > Revolution Ballast EMI Filter - http://tinyurl.com/hclaw3m
> >
> > Galaxy Grow Amp Model 902220 - http://tinyurl.com/hx59v5z ;(click
> > on
> > the FCC docs button for information on EMC testing)
> >
> > Galaxy Grow Amp Model 902220 emissions test report -
> > http://tinyurl.com/hlp9g9k
> >
> >
> >
> >
> >
> > Larry K5RK
> >
> >
> >
> >
> >
> > _______________________________________________
> > RFI mailing list
> > RFI@contesting.com
> > http://lists.contesting.com/mailman/listinfo/rfi
> _______________________________________________
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