[AMRadio] Desperate for a RFI solution.

[Jonathan Rines]

My location is noisy on the lower bands to the point of being unusable. I use separate transmitters and receivers, so I have more options. I use an SDRplay for my receiver and the noise is eliminated using the noise blanking feature. Just one mouse click and it’s gone.

Jon
KA1TDQ

Sent from my iPhone

> On Apr 20, 2018, at 2:14 PM, Randy Berry <randyn3lrx at gmail.com> wrote:
> 
> Hi,
> I recently bought a Yaesu FT-857D and I have tried everything to mute
> the noise in the receiver. I get an s8-s9 noise floor on every band
> but VHF/UHF. I've tried everything I can think of to kill the noise.
> This is not the first radio plagued by the noise. This has been an
> ongoing battle ever since I moved into this building.
> 
> Here's my situation. I am an apartment dweller living on the third
> floor with indoor antennas. I am not allowed to have any outdoor
> antennas on my balcony. (I've already been warned once with my stealth
> shortened dipole.) So I am using 2 MFJ-1699T 10 band antennas and a
> dipole kit in my living room. I also use a MFJ-939 autotuner which
> works great, it will tune lawn furniture! It even does 6 meters which
> it's not supposed to.
> 
> Anyway, I get a constant noise floor as high as s9 on all HF bands. I
> added a common mode choke inline and that dropped it some. (It was
> even as high as +20db before the choke.) I can't even hear anything on
> CB channel 19! I tried to hear the local 10 meter slop bucket net and
> could hear faint voices but not make any intelligence out of them due
> to the high noise floor. 144/440 is fine. I get little noise at all, 6
> meters is a little noisy, but usable.
> 
> I bought this rig because my standalone receiver died and I needed
> something to listen to and since I can't use my K7DYY Super Sr.
> transmitter anyway, I decided to buy a transceiver so I can talk too.
> It does AM at 25 watts carrier, and one of the first things I did was
> program in all the common AM frequencies on all the bands! Over the
> years I have spent tons of dollars and countless hours trying to
> resolve this and nothing works.
> 
> I think it's the CFL's in the hallway. There is one every 10 feet or
> so for the entire length of the building, on both sides of the
> hallway. They are the only thing I can think of that runs 24/7/365. Is
> there any way possible to clean up their noise so I can use HF
> peacefully?
> 
> I don't have any CFL's in my apartment. I'm still using Edison
> technology, all my wall warts and switching supplies are clean, so
> it's not coming from my apartment. I've even turned off the AC main in
> my breaker box and tried on battery from inside my apartment. No
> change.
> 
> I'm open to all suggestions apart from vandalizing the property by
> breaking all the bulbs. (Believe me I've thought of that already!)
> Anything I can make or buy to filter CFL noise?
> 
> tnx es 73 de Randy, N3LRX
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