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Today's Topics:
1. Re: HF radio signal propagation topics... (Paul McD)
2. Peru (Charles B)
3. Somali radio stations off air (Zacharias Liangas )
4. Somali government shuts down three Radio stations /Shabelle
(Zacharias Liangas )
5. Pirate radio broadcasts delayed six takeoffs from Ben Gurion
(Zacharias Liangas )
6. Report of fact-finding trip to Venezuela (Zacharias Liangas )
7. dx from south wyo. (Robbie j.)
8. HCDX logs between 2007-06-06 0000 UTC and 2007-06-07 0000 UTC
(Risto Kotalampi)
9. Re: dx from south wyo. (Joe Strain aka Yodar)
10. Re: dx from south wyo: Korea 9560 (Glenn Hauser)
----------------------------------------------------------------------
Message: 1
Date: Tue, 5 Jun 2007 22:51:35 -0700 (PDT)
From: Paul McD <[EMAIL PROTECTED]>
Subject: Re: [HCDX] HF radio signal propagation topics...
To: Dan Ferguson <[EMAIL PROTECTED]>, [EMAIL PROTECTED],
[EMAIL PROTECTED], HardCore DX <[email protected]>,
[EMAIL PROTECTED], [EMAIL PROTECTED], SWL Mailman
QTH <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
There was a paper in the IEEE about HF reciprocity in the mid 1980's which
showed that HF reciprocity did not always exist. See:
"A new wideband HF technique for MHz-Bandwidth spread-spectrum radio
communications"
by B. Perry, Communications Magazine, IEEE
Volume 21, Issue 6, Sep 1983 Page(s): 28 - 36
A sinusoidal signal at constant amplitude (power), swept in frequency over a
one MHz HF bandwidth, was transmitted from place A to B. Then B sent the same
signal back to place A with roughly identical equipment. Both received signals
were recorded (A's signal at B, B's signal at A). The two signal strengths did
not always match with respect to frequency. A plot of the frequency response at
A did not always look like the frequency response at B. The time difference
between A transmitting and B transmitting was one second (i.e. A transmits to B
for one second, B transmits to A for the next second, thus alternating seconds).
Hope this helps.
Paul
Dan Ferguson <[EMAIL PROTECTED]> wrote: Tom,
IIRC (perhaps not a given anymore, if ever), signal power reciprocity is
essentially built in to the underlying prediction engine (VOACAP) upon which
the software you've used is based.
DanF
----- Original Message -----
From: "Tomas Hood (NW7US)"
Sent: Monday, June 04, 2007 10:54 PM
Subject: HF radio signal propagation topics...
> Hello, fellow SWL'er and potential Amateur Radio Operator:
>
> I'm letting this list know about some additions to my website (
> http://hfradio.org/ ). These new pages contain information that many
> radio operators will find useful (based on the feedback I have gotten
> from this material when the original was published in CQ Magazine and
> Popular Communications Magazine).
>
> One would think that ionospheric radio propagation would be
> reciprocal. That is, the signal strength in one direction should be
> the same as in the reverse, or reciprocal, direction. In HF ray-trace
> theory, the distance is the same and the ionospheric control
> points-the points where the wave is reflected (or more properly,
> refracted) back to the ground-should be the same. This is an
> interesting topic for those using very low power, for example. Can
> your signal be heard well at the distant station, and can it compete
> with other signals that might be originated with a higher energy
> level?
>
> I explored this (is HF propagation reciprocal?) in a recent CQ
> Magazine "Propagation" column. I've posted the meat of the text at:
>
> http://hfradio.org/ace-hf/ace-hf-reciprocal.html
>
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------------------------------
Message: 2
Date: Wed, 6 Jun 2007 10:03:08 -0000
From: "Charles B" <[EMAIL PROTECTED]>
Subject: [HCDX] Peru
To: "Marie Lamb" <[EMAIL PROTECTED]>, "Anker Petersen"
<[EMAIL PROTECTED]>, "Cumbre" <[EMAIL PROTECTED]>, "Gayle
Van Horn \(MT\)" <[EMAIL PROTECTED]>,
<[email protected]>, "wghauser" <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Peru, 4826.37, Radio Sicuani, 0952-1005 Although I had been sitting here
for a
few minutes prior to 0952 and there was a decent carrier, the audio didn't
present itself until just now. When that happened, I noticed just Spanish
comments from a male, with many mentions of "Peru". Periodically the signal
would drop back into the noise and disappear for a few moments. Overall
it was threshold. (Chuck Bolland, June 6, 2007)
WinRadio G305e/PD
Clewiston, Florida
------------------------------
Message: 3
Date: Wed, 6 Jun 2007 20:51:16 +0300
From: "Zacharias Liangas " <[EMAIL PROTECTED]>
Subject: [HCDX] Somali radio stations off air
To: <>, "[email protected]"
<[email protected]>, [EMAIL PROTECTED], martin
Schoech <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII
Somali radio stations off air
06/06/2007 15:11 - (SA)
http://somalinet.com/news/world/Somalia/10927
Mogadishu - Somalia's transitional government on Wednesday ordered
three local private radio stations to stop broadcasting from the country's
capital.
Mogadishu-based stations Shabelle Radio, Radio HornAfrik and the
Voice of the Koran radio stopped broadcasting early on Wednesday
afternoon, an AFP correspondent said.
"We have been ordered to close the radio station and we don't know
why so far," Mohamed Amin, director of Shabelle, told AFP.
"I have called some government officials to ask them why the radio
stations have to close but they said we could discuss the issue later,"
he added.
Government officials were not immediately available for comment but
have in the past complained of pro-Islamist bias in the outlets'
reporting.
The Somali government in January banned the same three Mogadishu
broadcasters as well as Qatar-based Al-Jazeera satellite television
network for 24-hours following the ousting of an Islamist movement by
Ethiopia-backed Somali troops at the start of the year.
Somali officials are attempting to organise a national reconciliation
conference to start on June 14, despite an increasing Islamist-led
insurgency, including suicide car bomb and landmine attacks on
prominent targets in Mogadishu.
http://zlgr.multiply.com (raidio monitoring site plus audio clips )
http://www.worldisround.com/articles/302315/ (Litohoro) 321199/Tinos
http://www.flickr.com/photos/zachgr pictures upload
.
on my main : www.geocities.com/zliangas
-tty-px.html : test of various TTY programs
-ethics.htm : greek ethics , days and institutions
-frape.htm: the greek way of cofee !!!
Zacharias Liangas , Thessaloniki Greece
greekdx @ otenet dot gr ---
Pesawat penerima: ICOM R75 , Lowe HF150 , Degen 1102,1103,108,
Tecsun PL200/550, Chibo c300/c979, Yupi 7000
Antenna: 16m hor, 2x16 m V invert, 1m australian loop
------------------------------
Message: 4
Date: Wed, 6 Jun 2007 20:51:16 +0300
From: "Zacharias Liangas " <[EMAIL PROTECTED]>
Subject: [HCDX] Somali government shuts down three Radio stations
/Shabelle
To: <>, [EMAIL PROTECTED], "[email protected]"
<[email protected]>, martin Schoech <[EMAIL
PROTECTED]>,
Voyager <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII
Somalia: Somali government shuts down three Radio stations
http://www.shabelle.net/news/ne3059.htm
Aweys Osman Yusuf
Mogadishu 06, June.07 ( Sh.M.Network) The Somali government has
issued a decree to close down three main FM stations in the capital.
The decree orders Shabelle Media Network, Horn Afrik and IQK (The
holy Quran Media) to shut down.
Reasons were not given for the closure.
These three radios have been ordered to shut down twice in the past as
the Somali government accused them of exaggerating the government
and Ethiopian military operations in Mogadishu, the Somali capital.
Horn Afrik and IQK went off air soon after they received the decree.
Shabelle Media Network is still on air as the decree has not yet been
brought to it.
The decree was, however, read in Horn Afrik station before the closure.
We will keep you updated as the news develops.
Somali Radio Warsan in Baidoa was closed two days ago after the
government administration in the farming town issued the decree to
shut the FM down.
Shabelle Media Network Somalia
E-mail us: [EMAIL PROTECTED]
http://zlgr.multiply.com (raidio monitoring site plus audio clips )
http://www.worldisround.com/articles/302315/ (Litohoro) 321199/Tinos
http://www.flickr.com/photos/zachgr pictures upload
.
on my main : www.geocities.com/zliangas
-tty-px.html : test of various TTY programs
-ethics.htm : greek ethics , days and institutions
-frape.htm: the greek way of cofee !!!
Zacharias Liangas , Thessaloniki Greece
greekdx @ otenet dot gr ---
Pesawat penerima: ICOM R75 , Lowe HF150 , Degen 1102,1103,108,
Tecsun PL200/550, Chibo c300/c979, Yupi 7000
Antenna: 16m hor, 2x16 m V invert, 1m australian loop
------------------------------
Message: 5
Date: Wed, 6 Jun 2007 20:51:17 +0300
From: "Zacharias Liangas " <[EMAIL PROTECTED]>
Subject: [HCDX] Pirate radio broadcasts delayed six takeoffs from Ben
Gurion
To: martin Schoech <[EMAIL PROTECTED]>, [EMAIL PROTECTED],
"[email protected]" <[email protected]>, <>,
Voyager <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII
Pirate radio broadcasts delayed six takeoffs from Ben Gurion
06.6.07 | 19:20 By Zohar Blumenkrantz
Pirate radio broadcasts delayed six takeoffs from Ben Gurion
International Airport today.
The director-general of the Israel Airports Authority, Gabi Abutboul,
halted all takeoffs temporarily because of disruptions in
communications between the jets and the control tower, due to the
illegal radio broadcasts.
The affected lines included Lufthansa to Frankfurt, El Al to Barcelona
continuing onto Madrid, El Al to Paris, El Al to Rome, British Airways to
London, and Turkish Airlines to Istanbul.
The foreign airlines were infuriated at the delays. Swiss's manager in
Israel, Avner Gordon, was handling the case of a jet with 230
passengers stuck on the runway, unable to take off.
"Before the state opens the skies to competition and brings in low-cost
airlines, it has to handle the infrastructure," Gordon said. "It isn't enough
to have a pretty, efficient terminal. The planes have to be able to take
off safely. The nuisance of the pirate radio signals disrupting
communications between the planes and the control tower must be
handled decisively."
Apparently the workers concur. Labor representative Pinchas Idan
threatened to call a strike from next week unless the communications
disruptions are eradicated.
The police said they received a complaint from a Communications
Ministry representative about a pirate radio station operating from
Yehoshua Street in Bnei Brak, which was causing disruptions at the
airport. The site was raided, equipment was confiscated and the owner,
a 53-year old man, was detained for questioning, and released on bail.
http://zlgr.multiply.com (raidio monitoring site plus audio clips )
http://www.worldisround.com/articles/302315/ (Litohoro) 321199/Tinos
http://www.flickr.com/photos/zachgr pictures upload
.
on my main : www.geocities.com/zliangas
-tty-px.html : test of various TTY programs
-ethics.htm : greek ethics , days and institutions
-frape.htm: the greek way of cofee !!!
Zacharias Liangas , Thessaloniki Greece
greekdx @ otenet dot gr ---
Pesawat penerima: ICOM R75 , Lowe HF150 , Degen 1102,1103,108,
Tecsun PL200/550, Chibo c300/c979, Yupi 7000
Antenna: 16m hor, 2x16 m V invert, 1m australian loop
------------------------------
Message: 6
Date: Wed, 6 Jun 2007 20:51:16 +0300
From: "Zacharias Liangas " <[EMAIL PROTECTED]>
Subject: [HCDX] Report of fact-finding trip to Venezuela
To: "[email protected]" <[email protected]>,
<>, [EMAIL PROTECTED], martin Schoech <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII
Venezuela - Report of fact-finding trip to Venezuela : "Closure of Radio
Caracas Televisisn Consolidates media hegemony"
http://www.cnw.ca/fr/releases/archive/June2007/05/c9016.html
MONTREAL, June 5 /CNW/ - Reporters Without Borders today
releases a
report of a fact-finding trip it made to Venezuela from 24 to 28 May to
examine the impact of the closure of Radio Caracas Televisisn (RCTV),
the
country's most popular television station.
RCTV's 53 years in broadcasting came to end at midnight on 27
May, five
months after President Hugo Chavez announced that its licence would
not be
renewed because it had supported the coup that briefly ousted him in
April
2002.
Widely condemned abroad, RCTV's closure was much more than
just an
administrative measure. It was a political move without precedent in
Latin
America, a key element in a government takeover of the broadcast
media that is
part of a determined effort to control and occupy the entire public arena.
Reporters Without Borders went to Venezuela to assess the
consequences of
this event on press freedom and free expression in the country,
meeting with
media owners, journalists, NGO representatives and political analysts.
It also
spent RCTV's last day on the air at the commercial broadcaster's
headquarters.
The press freedom organisation found that the decisions to close
RCTV and
transfer its terrestrial broadcast channel to a new public TV station,
Televisora Venezolana Social (Tves), were conducted outside of all
regular
legal channels and in defiance of the jurisprudence established by the
Organisation of American States, to which Venezuela belongs.
Reporters Without Borders intends to refer this matter to the United
Nations Human Rights Council, the Inter-American Commission on
Human Rights
and the Council of Europe.
For further information: Emily Jacquard, Canadian office representative,
Reporters Without Borders, (514) 521-4111, Cell: (514) 258-4208, Fax:
(514)
521-7771, [EMAIL PROTECTED]
http://zlgr.multiply.com (raidio monitoring site plus audio clips )
http://www.worldisround.com/articles/302315/ (Litohoro) 321199/Tinos
http://www.flickr.com/photos/zachgr pictures upload
.
on my main : www.geocities.com/zliangas
-tty-px.html : test of various TTY programs
-ethics.htm : greek ethics , days and institutions
-frape.htm: the greek way of cofee !!!
Zacharias Liangas , Thessaloniki Greece
greekdx @ otenet dot gr ---
Pesawat penerima: ICOM R75 , Lowe HF150 , Degen 1102,1103,108,
Tecsun PL200/550, Chibo c300/c979, Yupi 7000
Antenna: 16m hor, 2x16 m V invert, 1m australian loop
------------------------------
Message: 7
Date: Wed, 6 Jun 2007 15:22:50 -0700 (PDT)
From: "Robbie j." <[EMAIL PROTECTED]>
Subject: [HCDX] dx from south wyo.
To: [email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
Hey All, on 06/04/07 I heard(with a very good signal)
KBS out of Soule south Korea at 02:44 ut on
9.559.80mhz. They had a program called marketplace on
and were talking about a new steel making process. Was
real nice to hear a new contry last night.(for me)
They were coming over via a BBC relay site.(don`t know
witch one) Good dx to all, Robbie in wyoming
____________________________________________________________________________________
Got a little couch potato?
Check out fun summer activities for kids.
http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&cs=bz
------------------------------
Message: 8
Date: Wed, 6 Jun 2007 23:05:02 +0000
From: Risto Kotalampi <[EMAIL PROTECTED]>
Subject: [HCDX] HCDX logs between 2007-06-06 0000 UTC and 2007-06-07
0000 UTC
To: [email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=us-ascii
Hard-Core-DX.com logs from 2007-06-06 0000 UTC to 2007-06-07 0000 UTC
---------------------------------------------------------------------
Please visit http://log.hard-core-dx.com/ for the real time logs
and to submit your logs to the HCDX Online Log.
For more information please email [EMAIL PROTECTED]
-----------------------------------------------------
------------------------------
Message: 9
Date: Wed, 6 Jun 2007 16:18:04 -0700 (PDT)
From: Joe Strain aka Yodar <[EMAIL PROTECTED]>
Subject: Re: [HCDX] dx from south wyo.
To: [email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
WOW! Thats a country I have (seemingly) no hope of receiving here in the black
RF hole of central florida. Very poor ASIA receipts here even with a voltage
probe antenna
good report!
yodar
"Robbie j." <[EMAIL PROTECTED]> wrote:
Hey All, on 06/04/07 I heard(with a very good signal)
KBS out of Soule south Korea at 02:44 ut on
9.559.80mhz. They had a program called marketplace on
and were talking about a new steel making process. Was
real nice to hear a new contry last night.(for me)
They were coming over via a BBC relay site.(don`t know
witch one) Good dx to all, Robbie in wyoming
____________________________________________________________________________________
Got a little couch potato?
Check out fun summer activities for kids.
http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&cs=bz
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_______________________________________________
THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied, distributed
and/or modified under the conditions set down in the Design Science License
published by Michael Stutz at
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Message: 10
Date: Wed, 6 Jun 2007 17:32:49 -0700 (PDT)
From: Glenn Hauser <[EMAIL PROTECTED]>
Subject: Re: [HCDX] dx from south wyo: Korea 9560
To: Joe Strain aka Yodar <[EMAIL PROTECTED]>,
[email protected]
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=iso-8859-1
Axually, you have a very good chance if you try it, since this is a relay via
Sackville, Canada. 73, Glenn Hauser
--- Joe Strain aka Yodar <[EMAIL PROTECTED]> wrote:
> WOW! Thats a country I have (seemingly) no hope of receiving here in the
> black RF hole of central florida. Very poor ASIA receipts here even with a
> voltage probe antenna
>
>
> good report!
>
> yodar
>
>
> "Robbie j." <[EMAIL PROTECTED]> wrote:
> Hey All, on 06/04/07 I heard(with a very good signal)
> KBS out of Soule south Korea at 02:44 ut on
> 9.559.80mhz. They had a program called marketplace on
> and were talking about a new steel making process. Was
> real nice to hear a new contry last night.(for me)
> They were coming over via a BBC relay site.(don`t know
> witch one) Good dx to all, Robbie in wyoming
>
>
>
>
____________________________________________________________________________________
> Got a little couch potato?
> Check out fun summer activities for kids.
>
http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&cs=bz
>
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> _______________________________________________
>
> THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied, distributed
> and/or modified under the conditions set down in the Design Science License
> published by Michael Stutz at
> http://www.gnu.org/licenses/dsl.html
>
>
>
>
>
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>
> THE INFORMATION IN THIS ARTICLE IS FREE. It may be copied, distributed
> and/or modified under the conditions set down in the Design Science License
> published by Michael Stutz at
> http://www.gnu.org/licenses/dsl.html
>
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