I have one of the MFJ-856 DIRECTIONAL NOISE FINDER W/3 ELE BEAM
does work well on some kinds of noise, found in the ~135 mhz range
but since I live in an 80 unit apartment complex,
many of the noise sources it came up with, were real noises,
just not the actual noises that were causing my rfi problems,
lots of false positives in my case. ynnv
I finally had to go to the actual HF frequencies
where I was hearing the problems to try to locate some of my rfi.
the 2nd unit, the MidnightScience Ultrasonics Kit
Is the type for finding 'which' insulator on a pole is the bad one,
this is after you have tracked down the pole with something like the MFJ-856
GB & 73
On 3/11/2012 7:59 AM, Jorge Diez - CX6VM wrote:
> What about this ones to catch in the shack noise also, do you think is good
> to have one of this? Or I can do the same with a radio?
> -----Mensaje original-----
> De: firstname.lastname@example.org [mailto:email@example.com] En nombre
> de K1TTT
> Enviado el: Domingo, 11 de Marzo de 2012 08:02 a.m.
> Para: 'RFI Mailing List'
> Asunto: Re: [RFI] Receiver settings for hearing RFI?
> I would use ssb with wide filters, or dsb if your radio has it since that
> gives double the bandwidth. In AM a stable signal would just sound like
> quiet air, though that should be noticeable by the lack of noise it seems
> more obvious when you sweep across a carrier in ssb than am.
> David Robbins K1TTT
> e-mail: mailto:firstname.lastname@example.org
> web: http://wiki.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://k1ttt.net
> -----Original Message-----
> From: Gary K9GS [mailto:email@example.com]
> Sent: Sunday, March 11, 2012 06:18
> To: RFI Mailing List
> Subject: [RFI] Receiver settings for hearing RFI?
> This may be a silly question but...
> I plan on evaluating my house for HF noise sources by powering the radio
> from a battery and powering down the rest of the house. I just have to have
> some sources with cell phone chargers, computer routers, laptop chargers and
> such. Then I'll power up one breaker at a time.
> Can I assume that the best receiver settings are AM mode and as the widest
> bandwidth filter settings? As each breaker is switched on I should cycle
> through the bands? I suppose if I do this I'll need to cycle the breaker
> each time I change bands?
> I better do this when the XYL isn't home :))
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