How Long Are We Going to Endure What\'s on 7050 Khz

YO2MAD (yo2mad@yahoo.com) writes ...


"Everyone knows the special magic of 7 Mhz. Still
is there nothing that can be done about the incredible
non-amateur, non-comercial, illegal NOISE from 7050 Khz,
7070Khz, 7080Khz... Who's doing this?


They say that there are deliberated jamming operations
over some Mujahedin AM stations... But anyway...


Can we do something?

YO2MAD"

[aa4pc]

Perhaps if enough stations take bearings on these signals, we can ask that our FCC takes up the cause with their counterpart agency in the country that the interference is being generated in. We could also ask the radio league in each of our respective countries to help push for enforcement, it could make a difference.

[WA4MJF]

This is a legitimate action taken by governments
against stations that they don't want an
audience to hear.

If it is a non-government jammin' station, then perhaps somethin' might be done.

But if it is plain ole Electronic Warfare,
not a whole lot can be done.

73 de Ronnie

[K2WH]

How do you know it's illegal? If it is sanctioned by the government of a country then it is legal at least in that country.

[kc4mqf]

I posted a question about this noise on eHam.net in the elmer section. I fifured I might get an explanantion there for the noise. There were a few ideas tossed about. Here is the forum: http://www.eham.net/forums/Elmers/14152

[KS4HR]

What noise are you talking about? 7080 is "THE" PSK freq, It's been a few months since I listened, but is that the "NOISE" you are hearing?



PACKET, PSK, AMTOR, etc are all used on the bottom of 40m. One mans noise is another mans signal!

And don't forget the megawatt broadcasters across the upper area of 40m after dark. We are "shared usage" on many bands.

[kc4mqf]

I found an atricle at the ARRL site on the noise. The last parapgraph of this article speaks of the noise being heard on 40m. ****

http://www.arrl.org/news/stories/1999/10/14/2/ ****


"...This week, Bowker said a similar--but not identical--signal showed up on 40 meters on October 9. He said he monitored the signal in the vicinity of 7.020 to 7.080. "Although it sounds similar, it has three distinctly different characteristics," he said. The signal's sidebands extend 7 kHz either side and "it is a frequency hopper, moving randomly in time and frequency steps." Bowker said the 40-meter signal also contains "FM chirp" in the sidebands. The signal was a "fairly steady" 20 dB over S9 at Bowker's QTH in Fort Kent, Maine. He said he did not believe the signal originated from the US or Canadian east coast."
****
"Additional reports and observations are welcome to ARRL Volunteer Monitoring System Administrator Tom Hogerty, KC1J, thogerty@arrl.org."

[kd7jft]

A quick check of the ILG database shows:
7050 VO MOJAHED in IRAQ and
7070 VO MOJAHED in IRAQ


This station is jammed a lot. The 7080 freq may just be this station moving around trying to avoid jamming.

[KB8ANY]

If you think this is bad then you should have heard the woodpecker.

73, Paul

[n2ea]

You CAN hear the woodpecker...it's on 18MHz
these days!! ((That's OTH, or Over The Horizon
radar, for those of you too young to remember
the cold war.)) And now, it frequency HOPS,
too. Sometimes IN 17m, sometimes nearby.

Jim/N2EA

[VE6CI]

Paul, you sure have that right. The woodpecker was unreal, good comment" 73's

[wa7kpk]

Man, now you're making me feel old -- so old that I'd FORGOTTEN the woodpecker! :)

I do remember the Soviet jammers of the 60s through at least the 70s, though. I found an interesting article on the Net the other day from a guy who worked at a radio station in Estonia that did double duty as a jammer, right after he got out of technical school. Interesting read:

http://www.okupatsioon.e e/english/mailbox/radio/radio.html (http://www.okupatsioon.ee/english/mailbox/radio/radio.html)

73, Creede

[WH7QQ]

OK, here's one we might be able to do something about: The non-identifying hispanics that operate on 7.088 and deliberately QRM the Hawaii Afternoon Net (0200Z). One of our stations who is bilingual has determined from the conversations that they are operating from the Los Angeles area. (Note that SSB operation in the 7.075 to 7.100 segment is legal for U.S. Hams located in Hawaii and Alaska.)

Paul, WH7QQ

[zl2aub]

I checked 7080 here this morning and there was fella chanting and raving on what subject I am not sure.dont speak his lingo was am tansmission at 5/9 with weak jamming in background. 20:25gmt 25/01/2002 cheers Pete ZL2AUB

[kb9pjl]

Like DA ....... The US And The AM Cowboys ON
10M

[vk6bcp]

Yes my friend, that is a real disaster on 7.070 MHz. It gives me a lot of pain every day when I try to do my contacts to Europe. The qrm broadcast usually start at 19.30 UTC and it end at 21.30 UTC. And its sooo strong, some days 60db above the S 9 mark. It distroys about 30 kHz of the band when its working. I really dont know what to do to get rid of this rubbish there.
73 from Walter in Perth VK6BCP

[w3asa]

I have heard what sounds like OTH on 10 m. It appears on my 756Pro spectra scope to be swept over a 20kHz band at a 25Hz rate. Is this a NATO OTH? somehere I ran across a reference to this on one of the band watch orginizations.

W3ASA,jim

[VA6AW]

The WOODPECKER still lives!! S.O.S.

I can still hear the ringing in my ears from that racket when I was attempting to pick out a weak CW signal with my headphones on 20 Meters. From S2 to 40 over in the blink of an eye.

I had hoped that thing was ancient history.

Gary VA6AW http://www.qrz.com/iB_html/non-cgi/emoticons/confused.gif