This is probably classic switching supply noise - the linear power
supply/battery would be a good way to rule out the lights themselves.
You could, unfortunately, have radiation both from the AC input to the
power supply (sending RF back to the mains) and from the wiring to the
individual lights, and if the racket extends to UHF, choosing the right
ferrite(s) could be interesting. Keep us informed, please!
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 3/11/2013 12:38 AM, Mike Ryan wrote:
The supplies utilized were of the same 'ilk' and not a linear type
such as an Astron, etc. I never got a chance to do the battery check
today but may very well be able to do so on Monday. I am also going to
take a little 10 amp supply over there as well to try it. But BROTHER
are this lighting system noisy. I will update the group as to what I
find. - Mike
-----Original Message----- From: Dale
Sent: Sunday, March 10, 2013 11:49 PM
To: Mike Ryan ; rfi@contesting.com
Subject: Re: [RFI] Cree LED Bulbs?
Mike,
When you changed out the power supplies, did you change to another
power supply identical to the original, or did you change to a known
"linear" power supply (NOT a switcher)? The battery and a linear
supply should produce quiet, identical results. If not, then the
individual light/lamp units might contain integral small switchers.
That would be a real bummer.
73, Dale
WA9ENA
-----Original Message-----
From: Mike Ryan <mryan001@tampabay.rr.com>
Sent: Mar 10, 2013 3:48 PM
To: rfi@contesting.com
Subject: Re: [RFI] Cree LED Bulbs?
I have a neighbor across the street that just installed a $400+
landscaping
lighting system. These are KILLING me on HF when they turn on at
night. I
even get noise on 220 and 440 FM from them. We have changed out the
power
supplies..no help. I am going to try a CAR BATTERY to see what happens.
That might isolate the problem to the power supply. But if that doesn't
work, I guess I will have to try some clip of ferrite blocks. I
wonder if
these are the same thing you are working with and if so, what's the fix?
The neighbor has been 'receptive' but I don't want to keep getting in
his
face about it until I am on to the fix - Mike
-----Original Message----- From: Aaron Kreider
Sent: Sunday, March 10, 2013 4:32 PM
To: rfi@contesting.com
Subject: Re: [RFI] Cree LED Bulbs?
I bought some cheap LED bulbs on ebay which range from bad RFI to
horrible RFI. So while they were cheap (maybe as low as $6), I
recommend staying away from Ebay. They also produce less light than
advertized (the 9 watt bulbs were dimmer than the 7 watt ones I got at
Lowes). The quality control was terrible.
Aaron
On 3/10/2013 4:01 PM, Eric Rosenberg wrote:
Is anyone familiar withthe LED light bulbs made by Cree (www.cree.com)
They look nice and are half the price of the competition.
They are available from Home Depot, on-line only through the end of
this
month, and then in the stores.
I'm (obviously) interested in whether they generate rfi/noise!
73,
Eric W3DQ
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