[RFI] Grow Light RFI

Tom Thompson w0ivj at tomthompson.com
Sat Jan 23 14:04:30 EST 2016

Hi Larry,

I have not tried any of the commercial filters, however, Kevin Jones, 
W7LOZ, reduced his neighbor's ballast RFI by 30 dB using the Revolution 
filter.  The RFI reduction  must be dependent on the particular ballast 
or installation.  I have been successful with my home made filter in 
about 5 installations.

Please let us know how the Galaxy ballast works.

Tom   W0IVJ

On 1/23/2016 9:32 AM, Larry Burke wrote:
> I'm dealing with a neighbor's grow lights at the moment. Fortunately they
> are being very cooperative. I tried the Revolution filter listed in one of
> the links. It did not help. Coincidently, just yesterday I ordered the
> Galaxy ballast as it apparently has a good RFI reputation. I'll post back
> after it comes in next week.
> Larry K5RK
> -----Original Message-----
> From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Tom Thompson
> Sent: Saturday, January 23, 2016 10:15 AM
> To: Donald Chester; rfi at contesting.com
> Subject: Re: [RFI] Grow Light RFI
> Hi Don,
> Here is an update for the group concerning grow light ballasts.  I have
> posted links to two commercial filters and an EMI test of a Galaxy ballast.
> The link to my web site is:
> http://tomthompson.com/radio/GrowLight/GrowLightBallastFilter.html
> The new information is at the bottom of the page.
> Tom   W0IVJ
> On 1/21/2016 10:59 AM, Donald Chester wrote:
>> This article appeared on the police.com website about a year ago:
>> http://www.policeone.com/drug-interdiction-narcotics/articles/8224280-
>> How-cops-are-catching-grow-ops-with-AM-radios
>> If ARRL, NAB and the greater amateur radio and broadcasting communities
> would distribute this and similar articles as far and as wide as possible,
> people carrying out illegal operations would become concerned (or paranoid)
> enough about the possible RFI they are generating, to make damn sure their
> grow lights are clean. Vendors selling the lighting systems will quickly get
> the message and clean up their products, and the problem will abate of its
> own accord, sooner, not later. If you suspect one of your neighbours is
> causing this problem and want to get rid of the interference without getting
> involved with cops, thugs, gangs, reprisals and court subpoenas, just print
> off copies of the article and anonymously mail it to the suspected culprits,
> or slip it in their letter box or leave it on their doorstep, and the noise
> just might inexplicably disappear.
>> Someone should forward this and similar articles to "High Times" magazine
> and other like-minded publications and webs sites; it would be nice to get
> the DIY home grow operations paranoid enough to buy better lighting
> fixtures. I couldn't care less if someone wants to grow their own weed; just
> make sure your usage or creation of mind altering substances doesn't
> negatively impact anyone but your own self.
>> This is a rare case where amateur radio operators,  AM broadcasters,  and
> other users of the MF and HF spectrum have RFI culprits by the part of the
> anatomy where it hurts, if we would just take advantage of the opportunity.
>> Don, k4kyv
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