Look for RI sources while active. Use the mode that is affected to ensure it is
the correct source. Changing modes and filters may make your radio more
susceptible to additional noise than you originally had, making it more
difficult to locate and ID. All power supply sources have the potential to
change characteristics with load changes.
Michael C Martin
Providing RFI Services
PO Box 411
Traceys Landing, MD 20779
240-508-3760
mike@rfiservices.com
www.rfiservices.com
-----Original Message-----
From: RFI [mailto:rfi-bounces@contesting.com] On Behalf Of garyk9gs
Sent: Sunday, October 22, 2017 3:19 PM
To: rfi@contesting.com
Subject: [RFI] Turn off the whole house to locate noise sources?
I have a question regarding the "turn off the whole house" recommendation.
Before doing so, do you search all of the ham bands looking for noise, say in
conjunction with the P3 set to wide span? Or do you look at the whole spectrum
from the AM bcb to 30 mHz?
I have a pretty quiet location but I still want to eliminate the noise
offenders in my own house.
And then repeat after the main breaker is turned off?
I suppose it makes sense to do the low bands during the daytime and the higher
bands at night when thrre are fewer real signals?
One other question regarding switch mode power supplies like cell phone
chargers and laptop power supplies. If the are plugged into the wall but not
connected to, say a phone, is that good enough or should they actually be
supplying current to a device?
73-Gary K9GS
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