This is the input/output filter you may be thinking of:
http://growershouse.com/nanolux-rf-filter-set-reduce-rf-interference
At this point I don't think my neighbor wants to do any additional
experimenting though.
Larry K5RK
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of Hare, Ed W1RFI
Sent: Monday, February 01, 2016 11:08 AM
To: dave@nk7z.net; rfi@contesting.com
Subject: Re: [RFI] Galaxy Grow Light Ballast Update
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
>
>
>
>
>
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