Re: ARLA/CLUSTER: O que é uma estação de escuta bem equipada para DX em Onda Media ?

[CT1GZB - José Luís Proença]

Belo post, obrigado João.

73 de José Luís Proença, Operador do Posto Emissor CT1GZB
ARVM # 53
REP # 1418
SKCC # 8178
CT-QRP # 058
NRA # PN 077
http://ct1gzb.blogspot.com


From: João Costa > CT1FBF 
Sent: Tuesday, November 19, 2013 5:00 PM
To: Cluster-ARLA 
Subject: ARLA/CLUSTER: O que é uma estação de escuta bem equipada para DX em Onda Media ?

Não procurem mais, a resposta está aqui:
"As nossas antenas em Aihkiniemi ( no Norte da Finlândia ) consistem de 14 antenas Beverage, cada uma com 1 km (3.000 pés) de comprimento, o que torna a nossa cabine, talvez, a melhor equipada de todas bases para DX AM em todo o mundo."

Ao que tudo indica até os chineses ficaram com os "olhos em bico".

João Costa (CT1FBF)

The 29th DXpedition to Aihkiniemi in Finnish Lapland

Our aerials in Aihkiniemi consist of 14 Beverage antennas, each 1 kilometer (3,000 ft.) long, which makes our cabin perhaps the best-equipped of all AM DXing bases in the world. The 14th antenna, which was built soon after my arrival, extends the Aihkiniemi antenna arsenal to a previously neglected area. This latest addition is a 1,000-meter wire at 210 degrees, which is intended to capture elusive local stations from Spain's Mediterranean coastline, as well as from Nigeria, which is one of the few African nations with an extensive selection of remaining AM stations. Here's an azimuthal map for Aihkiniemi with our antenna directions:



All four of us use Perseus hardware. While three of us favor the software made by the same manufacturer, I prefer to run my Perseus receiver with Jaguar.



      My receiver setup in Aihkiniemi surrounded by a mesh of antenna and grounding wires. Click to view explanations. 
The Aihkiniemi cabin is becoming increasingly well-equipped with all sorts of technical accessories. It even includes four laptop computers, so the amount of tech hardware that we have to haul there and back is diminishing every year. I still brought one of my own laptops because I wanted to have Jaguar installed on it. My large antenna switch box was one of the few items that I wasn't able to take by plane. Otherwise, all of the necessary stuff needed for a major listening and recording operation is already portable.

Three pieces of UPS protected us from a few short power outages (less than a second) and, surprisingly, we didn't have any major technical problems nor did we encounter any significant sources of external interference to our equipment, so we were able to focus on the fabulous world of DXing!

Sample some MP3 goodies for yourself

A unique opportunity for exciting new catches on the AM band is, of course, the rationale for undertaking a laborious expedition to a remote location like Aihkiniemi. There will always be goodies, even during less than ideal propagation conditions. Here are a few MP3 recordings showcasing what we picked up:

• RNE Radio 5, Salamanca, on 1314 kHz, as an example of how well our new 210-degree wire captures signals from Spain. RNE Salamanca, here beginning a local break, is where the well-known Spanish DXer Mauricio Molano works, so verifications are guaranteed!

• Radio Ethiopia, Mekele, on 1044 kHz, heard here signing off with a closing announcement and the national anthem. Ethiopian AM stations are actually heard quite often thanks to a one-of-a-kind 1000-meter wire directed towards the Horn of Africa.

• JOQC NHK2 Morioka, on 1386 kHz, signing off, just to show how well some Japanese stations can be heard. From Monday to Saturday, NHK2 stations close down at 1540 UTC, which is one of the few moments when it is possible to identify them. 

• KTWG Agana, Guam, on 801 kHz, is an example from the most coveted continent, Australia & Oceania, in the opposite end of the world from Finland. Again, pretty neat reception quality.

• KJNP North Pole, AK, on 1170 kHz, a regular catch up here, but very exotic on more Southern latitudes, heard here launching another broadcast day — just to give you a taste of the Arctic!



 • KJSK Columbus, NE, on 900 kHz, amazing strength considering that the station has never been heard before in Finland.


• KAKK Walker, MN, on 1570 kHz, a very rare station, and luckily just at closing time, transmitting at 250 watts of power. Indicative of the conditions, which favored Minnesota for a few days.

• WCSL Cherryville, NC, on 1590 kHz, obviously transmitting with daytime power of 10 kW through the night, again the first ID caught in Finland.

• HJZI G12 Radio, Bogotá, on 1550 kHz, one of the many Colombian stations that have fairly recently changed its name.

Stay tuned as more clips will become available later. 




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