Scott,
I have not tested the Galaxy ballast, but all the ballasts I have
encountered, which include the Lumatek LK1000, the Micromole 1000, and
the Quantum Series, will not meet FCC specifications I am sure. This
probably will not help you since you are looking at specifications, but
a commercial lamp filter ( https://www.hydrofarm.com/p/BAF2020 ) will
probably bring most offending ballasts into compliance. See
http://tomthompson.com/radio/GrowLight/GrowLightBallastFilter.html for
more information.
By the way, I applaud you for including FCC compliance in your city
ordinance.
Tom Thompson
On 12/2/2016 6:30 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@arrl.org> </div><div>Date:12/01/2016 4:14 PM
(GMT-05:00) </div><div>To: nm8rmedic <nm8rmedic@rocketmail.com>, Tom Thompson <w0ivj@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@contesting.com] On Behalf Of nm8rmedic via RFI
Sent: Thursday, December 01, 2016 4:09 PM
To: Tom Thompson; rfi@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@tomthompson.com> </div><div>Date:12/01/2016 1:32 PM
(GMT-05:00) </div><div>To: Roger D Johnson <n1rj@roadrunner.com>, RFI <rfi@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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