Newsgroup: it.hobby.radioamatori
Titolo: Altro che 7070...

Avreste dovuto vedere ieri sera, sui 17 metri!
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  Dear Cosimo,
thank you for your report. Yes, it is the Cyprus Woodpecker of the 
British Forces in Akrotiri, Cyprus.
I myself have hear the signal until 1705 UTC on 18100 with S9+30dB.
Regards,
Uli (Ulderico), DJ9KR
URL: 
www.iarums-r1.org
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saluti terrorizzati

io ultimamente sto scoprendo i 20mt ,
utilizzo un dipolo v invertita autocostruito, posizionato sul tetto,
circa 15 mt di altezza.
ricevo ottimi segn. oltre il 9.
secondo te doc. è meglio una verticale per i 20 mt?
saluti!
Dottor Mistero ha scritto:


 non c'entra niente, spiega 'sta cosa di Cipro :)
Immagina un accrocco che eroga qualche decina di megawatt di portanti 
spaziate di 50Hz per 40kHz complessivi, e avrai l'immagine dell'orrore puro.
saluti orrendi

 secondo te doc. è meglio una verticale per i 20 mt?
Una buona verticale (ma lunga, non la classica quarto d'onda) ha sempre 
un diagramma di radiazione più basso.
Un dipolo ben teso e alla giusta altezza però prende parecchio meno qrm 
e guadagna di più, inoltre è poco dipendente dalla bontà della terra.
La v invertita è un po' un accomodamento tra le due soluzioni.
L'ideale è avere entrambe le antenne e commutare al volo, tra l'altro la 
possibilità di commutare la polarizzazione può darti un grosso vantaggio 
nei dx.
saluti indecisi


quindi se stendo il dipolo, pun non essendo rotativo potrei avere
maggiori risultati  rispetto alla v invertita....
bene ci proverò! molte grazie!
simone

 maggiori risultati  rispetto alla v invertita....
Sicuramente. ovviamente nelle due direzioni normali al dipolo.
Per i 20m lo orienti est-ovest e lo posizioni a 10m da terra; se invece 
tu avessi palazzi alti vicino, meglio piů alto ma che superi gli ostacoli.
saluti distesi

 Per i 20m lo orienti est-ovest e lo posizioni a 10m da terra;
scusa doc per est ovest intendi un braccio steso ad est e uno ad
ovest?
tnx!saluti orientati!!

a scusa! io non ho palazzi vicino  . il dipolo è nel tetto, ma non
posso metterlo troppo diastante  dal tetto, circa 2 mt,comunque
intorno è libero!  speriamo bene!| HI


 ovest?
Al contrario, se il dipolo è in direzione nord-sud irradia a est e 
ovest, in quel modo ti fai solo i path polari! :-)
Per l'altezza dal suolo, il dipolo canonico dev'essere a lambda/2 dal 
terreno per almeno qualche lambda intorno all'installazione.
Altrimenti non rende bene, se lo metti sul tetto a due metri di altezza, 
potresti avere buoni risultati, ma non certo quelli del dipolo "perfetto".
saluti ideali

e quindi meglio se irradia ad est ed ovest. pensa un pò io pensavo
meglio nord sud.
ok grazie! adesso lo rigiro subito :P e vediamo che cambia!!! :)


 meglio nord sud.
Nord-sud se il tuo obiettivo sono i qso nazionali! Ma se vuoi fare 
Americhe ed estremo oriente ti serve est-ovest.
saluti e dx

 > e quindi meglio se irradia ad est ed ovest. pensa un pò io pensavo


 adesso sento meglio pure i nostri amici russi!  hi!
Uau! Riportalo com'era. :-)
splatteri e saluti

hahaha okok !!!
 ti ho mandato una mail... quando puoi... rispondimi!
tnx!!
simone


  ti ho mandato una mail... quando puoi... rispondimi!
fatto.
saluti privati

grazie! ti ho risposto ancora..! poi non ti stresso più!!
hi

 Tu non avere ankora visto mie tette :)
Corro a vomitare in anticipo.
conati e saluti

 andare a cercare un po' di notizie su questa cosa.
Eccole qui sotto, se ti servisse una foto dell'orrore te la mando in email.
 > Hihihihihi... dobbiamo assolutamente farci quattro risate sugli
 > 80 - sta diventando tradizione - le varie domeniche mattina.
Pronti! A parte i momenti topici riservati alla caccia (sunrise-sunset) 
sono a disposizione! :-)
saluti documentati
The Over-The-Horizon-Radars of the British, the Chinese, the Russians – 
and of the Australians.
Regular readers of the Intruder Watch News of Region 1 know quite well, 
that there are several Over-The-Horizon-Radars spoiling the life of the 
radio hams:
There is the radar of the British Forces on the island of Cyprus which 
has been using frequencies between 10 and 28 MHz for many years. Also 
you can hear the ticking signal of the Chinese on 14000 kHz. It sounds 
like a ticking tin alarm clock. Since November 2004 also the Russian 
Army can be heard in the 20-m-band with rattling pulses sounding like 
the woodpecker of the British Forces on Cyprus Island.
And again recently radio hams from Australia, New Zealand and Hong Kong 
have been complaining about wideband rattling pulses between 7000 and 
7050 kHz in the exclusive 40-m-band of the radio amateurs wiping out all 
amateur radio traffic.
They describe a new system, possibly an Over-The-Horizon-Radar. Wolf 
Hadel DK2OM who has sophisticated equipment, has got sound files of this 
intruder from hams in Hong Kong and New Zealand per means of internet. 
Wolf points out that the transmissions are different to the radars of 
the British, the Chinese, and the Russians.
Is it the Over-The-Horizon-Radar „JORN“ of the Australians which is 
causing trouble the radio amateurs of the southern hemisphere?
JORN is a sophisticated new radar network
JORN, short for “Jindalee Operational Radar Network”, is a sophisticated 
new radar network that can detect stealth bombers, curb illegal 
immigration and spy on neighbouring nations from at least 3000 
kilometres away. The $A 1.8 billion JORN has taken more than three 
decades to complete but is now undergoing final trials.
JORN is designated to monitor air and sea movements across 37,000 km of 
largely unprotected coastline and 9 million square kilometres of ocean. 
It is being used to cast a security shield across Australia’s remote 
northern approaches without the high cost of maintaining constant 
maritime and air patrols.
It uses two high frequency radio transmitters located 2300 kilometres 
apart, at Longreach and Laverton. The transmitter areas are about one 
kilometre long and can generate a 20 kilowatt signal, which is stronger 
than most radio station signals.
The signals are aimed at the ionosphere, where the beam is reflected 
over the horizon to targets up to 3000 kilometres away. A weak return 
signal from over the horizon is captured by a highly sensitive receiver 
that uses advanced software to separate background “clutter” from 
selected targets. The receiving antennas consist of two “arms”, each 
3400 metres long, and each site consists of 960 individual antenna masts.
Transmitter and receiver site near Longreach and Laverton are located 
about 100 kilometres apart to prevent electronic interference. The 
system is linked to 17 beacon stations across northern Australia, which 
are used to measure ionospheric conditions and calibrate transmissions 
from Longreach and Laverton.
Operational Use
Jindalee over-the-horizon radar was already used to track military 
aircraft landing an taking off from Dili Airport, East Timor, on 20 
September 1999, when Australia-led Interfet forces began securing the 
former Indonesian province from militia violence. Australian Hercules 
C130 transports were detected from 1500 kilometres away by a 6 
kilometres-long radar array at Longreach (Queensland), and at a similar 
site at Alice Springs (Northern Territory).
Aircraft images were displayed on radar consoles in Adelaide and 
Melbourne, 2600 kilometres from the action. Royal Australian Airforce 
commanders said the radar was accurate enough to show aircraft turing on 
their landing approach to Dili Airport.
The new radar has also been used to track illegal immigrants approaching 
Australia by boat through the region’s largely unguarded northern 
waters. Although designed primarily for air detection, JORN was 
reconfigured in 1999 at Australian Government request to scan for marine 
intruders. More than 500 illegal immigrants have been arrested and 
detained in recent weeks, largely as a result of JORN intelligence 
passed to civilian customs authorities. JORN can also measure wave 
height and wind direction for meteorological reports.
Jindalee radar at Longreach, Alice Springs and Laverton (Western 
Australia) enables Australian military commanders to observe all air and 
sea activity north of Australia to distances of at least 3000 
kilometres. This takes all of Java, Irian Jaya, Papua New guinea and the 
Solomon Islands, and halfway across the Indian Ocean.
Torres Strait High Frequency Surface Wave Radar (HFSWR) to boost border 
security
On May 4, 2005, the Australian Government launched a trial of new 
state-of-the-art Over-the-horizon-radar in the Torres Strait to boost 
protection of Australia’s northern borders from drugs, disease, illegal 
immigration and fishing.
The Torres Strait is located between Australia’s Cape York peninsula 
pointing to the north like a finger, and Papua New Guinea. The Defence 
Minister and the Justice and Customs Minister inaugurated the new system 
recently. They said the new Over-the-horizon High Frequency Surface Wave 
Radar (HFSWR) will allow Defence and Customs Coast Watch to better 
monitor Australia’s northern coastline, and in particular the highly 
strategic region of the Torres Strait.
As JORN the HFSWR can detect surface vessels and low-flying aircraft 
beyond the visible horizon, unlike conventional radars that are limited 
to line-of-sight operations.
A 440 metre long receiving antenna array is located on Dauan Island, in 
the northern Torres Strait. The transmitter site is on the uninhabited 
Koey Ngurtai (“Pumpkin”) island, to the north of Badu Island in the 
middle of the Torres Strait.
Hainan Woodpecker (Peoples Republic of China)
Almost 40 years ago China has deployed an Over-The-Horizon Backscatter 
Radar to provide surveillance of the South China Sea. The precise 
location o this facility for a long time remained unclear. China began 
deployment of HF ground wave OHT sensors in November 1967. A group led 
by Deputy Director of the Space and Missile Industry Quan Xuesen was 
assigned the responsibility of developing a ground wave OHT sensor able 
to detect targets at 250 kilometres. The radar was to provide targeting 
data for their embryonic anti-ship cruise missile program. In the 1970s, 
an experimental ground wave OTH radar, with an antenna length of 2300 
metres, was deployed on Hainan Island. Although appearing to be a 
tourist island of native tribes and small villages, Hainan Island 
features an embedded, but nearly invisible, strong military electronic 
infrastructure. The emergency landing of a U.S. Navy EP-3C at Lingshui 
airfield in 2001 was a peek into this.
Hainan certainly has one or more major electronics intelligence (ELINT) 
stations, but references usually vague or disagree in details. Because 
of the continuing threat of conflict with Vietnam, a major ELINT site 
probably was built on mountaintops on southwest Hainan. The most 
detailed description available discusses a large facility at Lingshui 
air base on the southeast coast.
Just south of Hainan you see the Paracel Islands located in the South 
China Sea. These islands were occupied by Vietnam until China seized 
them in occupation assaults supported by naval warships in 1974. A 1980s 
photograph of a naval base in the Paracels shows a huge multi-antennae 
array of 16 yagi antennas aimed skyward. Each antenna consisted of 8 
yagi cross arms. This monstrous array is not yet described or named in 
open literature references.
The Paracel Islands, are they the location of the OTH-radar wiping out 
vaste parts of the 80- and 40-m-band of the amateurs?
Brett Graham, VR2BG, from Hongkong on August 30th sent me his comments 
on the Chinese woodpecker:
“Hainan Woodpecker on 7 MHz is an open case again with the HK telecom 
authority, number 7367. I hope to go out with them fairly soon with one 
of my antennas to show them how to get a bearing on it (refused offer of 
help now accepted).
Down on 80 metres, the Hainan Woodpecker has been especially obtuse in 
the mornings – covering 3550 to nearly 3800 kHz – now on our telecoms 
authority’s plate, case 8311.
At times, both bands are totally useless here about 500 km form the most 
likely source.
Bearings taken from 9M6BG are pointing to “our side” of the Taiwan 
Straight, is heard switching on at start of office hours and fades out 
later in the day, so suspect it is up the coast a ways. As our telecom 
authority’s fancy DF system works at this frequency, I am quite keen to 
get any other bearings that might help us to push a little harder this time.
Vy 73 de:- VR2BG, Brett Graham
July-Region 3 Newsletter of Arasu Manohar is blaming societies for 
non-activity and laziness
In his July newsletter Arasu Manohar, VU2UR, Co-ordinator of the 
Monitoring System of Region 3, calls out:
“The current topic for discussion and reporting is the unknown radar 
forms encountered on the amateur frequencies. There have been several 
reports already from NZART, WIA, HARTS and RAST regarding the 
Over-The-Horizon-Radar (OTHR) that has been heard right from 40 metre 
band to the 10 metre band. Once these stations are “switched on” they 
take away a good band of our frequencies, where no amateur radio work 
can be done. This is known to the many countries involved, but, they 
prefer to deny the presence to accept the presence and face the wrath 
and communication thereafter from the amateur fraternity. (…)
Unless and until all the National societies take immediate action to set 
up their Monitoring System, we are not in a position to exchange our 
notes and come to positive conclusions regarding the various types of 
interference and intrusions found right now.
If the regional Monitoring Systems Co-ordinator alone, is bringing this 
issue, it is not sufficient. Many of the readers of this bulletin in 
Region 3, must press their national society to organize monitoring of 
intrusions. We are already short of the excellent reports that were 
coming from HARTS from the logs of OM David, and also from RAST from the 
logs of OM Sheridon. They are doing a lot of work, which is getting 
unnoticed. They are having all the up-to-date facilities to get the wave 
form recording, too. It is time that all the societies rise the occasion 
and activate their facilities.”
Arasu’s thoughts are not only valid for Region 3, but also for Regions 1 
and 2 of IARU: We need more sophisticated equipment with experienced 
hams who are able to use it. Why don’t you start an intruder watch in 
your country yourself?
Help safeguard our exclusive amateur radio frequencies, join the 
intruder watch!