[RFI] Grow light RFI

Fri Dec 2 16:57:04 EST 2016

Jim,

Actually we are well beyond the formative period for this ordinance. It has been in place for about a year-and-a-half.  

I did request advice from ARRL before I wrote the ordinance. Their's was basically: don't do it.   But we did not find inaction acceptable.  I had our attorneys vett it and it actually has held up quite well and already been successful in mitigating an RFI problem caused by a formerly illegal grow operation that sought licensing. The FCC was a participant in that process.

And we continue to invoke the ordinance, which includes both Part 15 and Part 18 compliance, with any potential new grow operations. 

So it has already mitigated one, and with newly passed legislation here legalizing grow operations, it is preventing future problems.  What's not to like about that?

Don't get too worried guys. We don't enforce the FCC regulations, nor do we add to them, we merely require that they be met.  

We decided to act boldly and take chances, otherwise it is a certainty that we're going to live in an RFI polluted world. 

Scott

Sent via the Samsung Galaxy Note® II, an AT&T 4G LTE smartphone

<div>-------- Original message --------</div><div>From: Jim Brown <jim at audiosystemsgroup.com> </div><div>Date:12/02/2016  12:47 PM  (GMT-05:00) </div><div>To: rfi at contesting.com </div><div>Subject: Re: [RFI] Grow light RFI </div><div>
</div>Hi Scott,

I suggest that you get advice from ARRL and W1RFI on the wording of your 
ordinance. I suspect that they will advise you to avoid suggesting any 
specific products, and also that they will advise you to require 
compliance with Part 15 Class B for residential use. Or it may be that 
these products fall within Part 18.

73, Jim K9YC

On Fri,12/2/2016 5:30 AM, nm8rmedic via RFI wrote:
> Ed,
>
> Understood, and thank you.  The metodology is not my question, though.
>
> I still ask: what was the lowest frequency swept?  I infer from the tiny graph it was around 300 khz, but did not catch any numerical data at that point or outside of the points you mention.
>
> I ask b/c as a city manager we adopted an ordinance regulating marijauna grow operations and included a provision of local license approval based upon also meeting FCC regulations regarding RFI emissions.  We recommend an outboard filter for noisy ballasts, but I would like to also be able to make a recommendation for an effective and clean ballast from LF to VHF.
>
> Is this the one?
>
> Scott
>
>
>
> Scott
>
>
> Sent via the Samsung Galaxy Note® II, an AT&T 4G LTE smartphone
>
>
>
> <div>-------- Original message --------</div><div>From: "Hare, Ed  W1RFI" <w1rfi at arrl.org> </div><div>Date:12/01/2016  4:14 PM  (GMT-05:00) </div><div>To: nm8rmedic <nm8rmedic at rocketmail.com>, Tom Thompson <w0ivj at tomthompson.com> </div><div>Subject: RE: [RFI] Grow light RFI </div><div>
> </div>It looks like they swept the entire frequency range with a spectrum analyzer in peak-detection mode, obtained the 6 highest values and frequency, then went back and measured just those frequencies in quasi peak detector mode.  This is a common test practice.
>
> Ed, W1RFI
>
>
>
> -----Original Message-----
> From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of nm8rmedic via RFI
> Sent: Thursday, December 01, 2016 4:09 PM
> To: Tom Thompson; rfi at contesting.com
> Subject: Re: [RFI] Grow light RFI
>
> Tom,
>
> It looks like there were three test runs conducted. The tabular data shows the lowest frequency tested was 14 megahertz, in runs 1 and 2. The graphic data results show lower frequencies though. Can you verify the lowest frequency at which these were tested?  Scott
>
>
> Sent via the Samsung Galaxy Note® II, an AT&T 4G LTE smartphone
>
> <div>-------- Original message --------</div><div>From: Tom Thompson <w0ivj at tomthompson.com> </div><div>Date:12/01/2016  1:32 PM  (GMT-05:00) </div><div>To: Roger D Johnson <n1rj at roadrunner.com>, RFI <rfi at contesting.com> </div><div>Subject: Re: [RFI] Grow light RFI </div><div> </div>Roger,
>
> Here is an independent lab evaluation of a Galaxy ballast the may be a good bet.
>
> http://tomthompson.com/radio/GrowLight/RFI_Tests_Galaxy_902220_FCC-Report.pdf
>
> Tom   W0IVJ
>
>
> On 12/1/2016 11:27 AM, Roger D Johnson wrote:
>> Is there a list of ballasts that Don't cause RFI?
>>
>> 73, Roger
>>
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