[RFI] RFI on 1.8 mhz

[Dave Harmon]

Joe....
I have something similar here only on 40mtrs.....
I ran it down to the Dish TV receiver. Dish insists that a telephone line be
plugged into it at all times or pay a $5 penalty.
This phone line is so the unit can phone home when/if I order a pay-per-view
movie.
The unit causes RFI on 40mtrs but I killed it with a Radio Shack/C-Comm
inline filter.
The $5 penalty has been dropped but it is still connected in case I get
terminally bored.


Dave Harmon
K6XYZ[at]sbcglobal[dot]net
Sperry, Ok.


-----Original Message-----
From: RFI [mailto:rfi-bounces at contesting.com] On Behalf Of Joe
Sent: Tuesday, January 22, 2013 1:00 PM
To: RFI Contesting
Subject: Re: [RFI] RFI on 1.8 mhz

Kurt...I have one that you could have fun trying to locate...I never have. 
3 years ago, in the late fall, 7 MHz became unusable (Overnight!) due to a
very elevated white noise.  It comes on around 11 am or so, and stays in
place until mid evening to midnight, when the white noise drops away.  S 1-5
normal in 'no noise' period, 30-40 over during the day.

I have it on multiple HF radios, with house power off or on, no difference. 
Walking the neighborhood with various radios does no good.  All utilities
are underground, no overheads.  Nearest utility box is 4 blocks away. 
High tension lines are located 1.5 miles from the house, but no noise near
them when I go mobile.  Every now and again, the noise will be absent and I
can hear 'forever' on 7.204!  Right now it is 10:51 here and the noise level
is at 5.  By noon, it will be 9+ and working the JNN will be impossible.

I should add, that I have no issues on any other band, from microwave (1.2)
down to 75 meters.

Joe -WA6RKN

----- Original Message -----
From: "KD7JYK DM09" <kd7jyk at earthlink.net>
Subject: Re: [RFI] RFI on 1.8 mhz


>: 90% of teh RFI sources all sound the same...  It has not helped any at
> : all for me...  I have sen two of teh same thing, by different makers
> : sound different...
>
> I have tracked RFI for quite some time and I disagree.  Most sound 
> different
> and a source can be found days week and months sooner by knowing what you
> are looking for, just by the sound.  For example, RFI from a computer 
> power
> supply sound absolutely nothing like RFI from a power line, single phase 
> is
> different than three phase, different from cars, electric signs, cell
> phones, another HT in your presence...
>
> Patterns help, if you can see the source, if not, it means little other 
> than
> it's something someone has somewhere, which you already know.
>
> Getting out and sniffing around, with whatever you have, HT, portable SW
> receiver, car radio, they all work well.  Some things work better, most
> things can be found just by proximity.
>
> Kurt
>
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