Nulling QRM

[running dogg]

I've noticed in the last couple days that I can't get the BBC on 9525 at
0300, so I've had to listen to their 5975 freq out of Antigua. The
problem is that 49m is for me full of noise. The noise is so great that
it reduces the BBC to an unintelligible mumble, especially on my Degen.
So I fired up my Yaesu FRG-8800 and tried using SSB to null the noise,
but no luck, even though the LSB setting greatly reduces it I am still
left with a mumble level of audio. The signal is strong, it's just that
the QRM is stronger. I'm using about 50 feet of longwire (my old
antenna) coiled up inside because I can't have an outside antenna for
now. Any suggestions?

----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---

[RHF]

RD,
.
Try an In-Door Antenna 'designed' for Shortwave Listeners
with RFI and EMF Noise Problems . . . The Loop Antenna !
.
RG8 AND RG58 'type' COAX CABLE "IN-DOOR" LOOP ANTENNAS :
.
* Coax Cable [Shielded] Loop Antennas {GreerTech}
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1625
.
* Tuning the GreerTech [Coax Cable] HF Loop Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1730
.
* Loop Antenna -or- Active Loop Antenna ? ?
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1394
.
TV - CTV - DSS 'type' COAX CABLE "IN-DOOR" LOOP ANTENNAS :
.
* The "TRICK" to TV 'type' Coax Cable
[Shielded] Loop Antennas {RHF}
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1626
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1627
.
* Using an In-Line Pre-Amp with TV 'type' Coax Cable
[Shielded] Loop Antennas
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1634
.
* Lessons Learned - TV 'type' Coax Cable
[Shielded] SWL Loop Antennas {RHF}
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1643
.
* Hookin-Up your Radio/Receiver
to your TV Coax Cable [Shielded] SWL Loop Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1646
.
HOOK-UP WIRE / LITZ WIRE 'type' "IN-DOOR" LOOP ANTENNAS :
.
* "On-the-Wall" Loop Antenna and more . . .
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1459
.
* In-Door "On-the-Wall" Loop Antenna
for 'portable' AM/FM Shortwave Radios
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1845
.
* In-Door "Around-the-Room" Loop Antenna
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1883
.
IN-THE-ATTIC 'type' [SIMI-IN-DOOR] LOOP ANTENNAS :
.
* In-the-Attic Horizontal {Flat} 'double' Loop Antenna using 300 Ohm
Twin Lead
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1759
.
* ATTIC - Receiving Antenna Question - Think Loop made from TV Parts
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/1635
.
.
iane ~ RHF
.
All are WELCOME at the Shortwave Listener (SWL) "Antenna Ashram"
<http://groups.yahoo.com/group/Shortwave-SWL-Antenna/>
.
Some Say: On A Clear Day You Can See Forever.
http://groups.yahoo.com/group/Shortwave-SWL-Antenna/message/502
.
I BELIEVE: On A Clear Night . . .
You Can Hear Forever and Beyond, The BEYOND !
With a Shortwave Listener SWL Antenna of your own making.
- - If You Build It {SWL Antenna} You Will Hear Them - -
.
.

[Ron Hardin]

You're probably out of luck.

An actual beam antenna would work, meaning one with large forward
gain and resulting low response in most other directions, which you
aim AT the station you want to listen to. More dollars than most
SW listeners want to spend, if one is even available for the frequency
you want.

A small antenna can produce NULLs which you put on the stations you
don't want, eg. a loop or a loop+whip phased array, but the nulls
are small and everything else still pours in as before, and at night
the direction of arrival is not likely to be stable enough to null
even a single station unless it's a local (and so has a stable
direction).

A long wire has forward gain, though I forget whether it's along
the antenna or broadside to it. It's certainly along in the case
of a beverage antenna, so maybe it's along. Aim that at the
station you want and see if it helps. Be sure to look up the
great circle direction, they're not what you'd think.

--
Ron Hardin
rhha...@mindspring.com

On the internet, nobody knows you're a jerk.

[starman]

Ron Hardin wrote:
>
> A long wire has forward gain, though I forget whether it's along
> the antenna or broadside to it. It's certainly along in the case
> of a beverage antenna, so maybe it's along. Aim that at the
> station you want and see if it helps. Be sure to look up the
> great circle direction, they're not what you'd think.

A 'real' longwire is directional towards the far end of the wire. A
random wire or inverted-L is generally non-directional if it's less than
a wavelength long. Most are somewhat directional on the higher HF
frequencies because the wire is at least one wavelength long.