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[RFI] RFI from low voltage lighting?

To: <rfi@contesting.com>
Subject: [RFI] RFI from low voltage lighting?
From: Bill Putney <billp@dune.wwpc.com> (Bill Putney)
Date: Tue, 20 Feb 2001 11:14:31 -0800 (PST)
When I take this thing apart there is a toridal transformer (might be an
autotransfomer) and a "dimming coil" (a small toroid wound choke). I don't see
any active componenets or any encapulated block...

Very strange.

73, Bill

On Feb 20, 12:53pm, Hare,Ed, W1RFI wrote:
> Subject: RE: [RFI] RFI from low voltage lighting?
> Hi, Bill,
>
> The problem is that the power supply is probably a switch-mode supply.
> These can generate a lot of broadband noise.  Some hams have replaced the
> power supply with an analog device.  It may also be possible to install a
> brute-force filter, such as the Radio Shack catalog #15-1111 or the filters
> sold by Industrial Communications Engineers. (See
> http://www.arrl.org/tis/tisfind.html to look up ICE's contact info.)
>
> Under the rules, these are incidental emitters. See
> http://www.arrl.org/tis/info/part15.html for info on various types of
> unlicensed emitters of RF.
>
> 73,
> Ed Hare, W1RFI
> ARRL Laboratory Supervisor
> 225 Main St
> Newington, CT 06111
> Tel: 860-594-0318
> FAX: 860-594-0259
> Internet: w1rfi@arrl.org
> ARRL Web: http://www.arrl.org
> ARRL Technical Information Service: http://www.arrl.org/tis/
>
>
>
> -----Original Message-----
> From: Bill Putney [mailto:billp@dune.wwpc.com]
> Sent: Tuesday, February 20, 2001 11:58 AM
> To: rfi@contesting.com
> Subject: [RFI] RFI from low voltage lighting?
>
>
>
> I don't understand this. I have a few Alfa low voltage lights (ceiling
> mounted
> transformers) around the house. They seem to be broad band HF noise
> generators.
> They aren't on dimmers. It seems to me that a 120:12 volt transformer and a
> halogen lamp shouldn't be an RFI source. Any ideas?
>
> 73, Bill
>
> --
> =====================================================================
> #  Bill Putney - WB6RFW            | My repeater:443.400 Mhz-100 Hz #
> #  WWPC                            | It's not open, it's not closed,#
> #  5780 Balmoral Drive             | it's controlled. It's open for #
> #  Oakland, CA 94619               | membership (which is free...). #
> #  billp@wwpc.com - (510)531-2412  | Go figure...                   #
> =====================================================================
>
> --
> FAQ on WWW:               http://www.contesting.com/FAQ/rfi
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> Questions:                owner-rfi@contesting.com
>-- End of excerpt from Hare,Ed, W1RFI



-- 
=====================================================================
#  Bill Putney - WB6RFW            | My repeater:443.400 Mhz-100 Hz #
#  WWPC                            | It's not open, it's not closed,#
#  5780 Balmoral Drive             | it's controlled. It's open for #
#  Oakland, CA 94619               | membership (which is free...). #
#  billp@wwpc.com - (510)531-2412  | Go figure...                   #
=====================================================================

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