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
--
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# Bill Putney - WB6RFW | My repeater:443.400 Mhz-100 Hz #
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# billp@wwpc.com - (510)531-2412 | Go figure... #
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