Searching at VHF works if it's impulse noise, but not if it's electronic
noise. Power lines are the major source of impulse noise; nowadays, much
(most?) of the noise we hear is electronic noise, and most of that is
from switching power supplies, solar systems, and variable speed motor
controllers. That loopstick AM radio IS useful for both, but in
different ways. When you put it close to an SMPS, you'll hear hash. My
quick test to confirm whether a wall wart is linear or switching is to
put the loop in the base of my TH-F6A next to it.
73, Jim K9YC
On 1/16/2018 12:39 PM, Steve Kurtzman wrote:
An AM radio with its directional bar antenna is helpful to triangulate
the area of the interference from different locations. Then move to
higher frequencies if you can still hear it, the higher freq the
better, with an HT and handheld yagi to narrow it down (Arrow antennas).
On Tue, Jan 16, 2018 at 11:53 AM, Jim Brown <jim@audiosystemsgroup.com
<mailto:jim@audiosystemsgroup.com>> wrote:
On 1/16/2018 11:39 AM, W0MU Mike Fatchett wrote:
What are people using for noise sniffing? I saw the MFJ dish
but I try to avoid their stuff.
http://k9yc.com/KillingReceiveNoise.pdf
<http://k9yc.com/KillingReceiveNoise.pdf>
73, Jim K9YC
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Steve
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