Essays by
presented by
Northern Star Media Services AS.
1.
Bölgeforplantning på lang-og mellombölge(Long-and
Mediumwave propagation)
(Teleelektronikk
1/1974, in Norwegian)
Some of the themes:
Field Strength curve 1 10 kHz-10 mHz
Field Strength curve 2 for 10 kHz-10 mHz
Wavefronts for two frequencies
Older version of Ground Conductivity
map for Norway
Field strength curves for 700 kHz
Field strength curves for 200 kHz
Ground-Wave propagation for
different values on 210 kHz
ITU 717-2
The Eckersley method
The Millington method
The Millington method-transfer for good to bad conductivity
The Millington method-transfer for bad to good conductivity
Resulting curve for multi-hops
Recovery-effect
Field strength curves for skywave propagation
Correction curve for magnetic dip and Correction curve for time deviation from midnight
Special treat for dxers: Ionospheric wave propagation for MW at distances greater than 3000 kms. Tests 1936-1937
and in the 1960s including many well-known stations:
BBC Lisnagarvey,
Radio El Mundo BA, KDKA
Pittsburgh, ERT Batra, Radio Senegal, RAI Roma, CBA Sackville, VOA Poro, Radio Americas, Kuwait, TWR
Bonaire, AFRS Asmara(KANU) Conacry,
BR Ismaning
Special treat for dxers: Sky-wave field strengths. ITU 431-5
Many of same stations plus CBA Moncton, ORTF Martinique, VOA Ban Pachi, TDF Allouis
Coverage with different power levels
3/22 Sea Gain. ITU
435-7 A single terminal at the coast,
LW/MW
New Field strength curves for 200 kHz
(Telecommunication
Journal 42/III 1975.)
3. Resultater fra LF/MF-konferansen(Results
from the LF/MF Conference(edited)
(Teleelektronikk
4/1977, in Norwegian)
Some of the themes:
Conductivity with different
types of ground
Examples of The Millington method+ Sea Gain. ITU 435-7 same as page 23 above, but in Norwegian
4.
Ground conductivity measurements
(Telecommunication Journal 51/II
1984.)
5. Some Quality and Coverage problems in Audio Broadcasting
(Teleelektronikk
2/2000)
How the
signal of LKO Oslo
Kringkaster/Klöfta 200kW was
improved.
Norkring
AS used processing on AM since the 70s and at LKA Vigra employed one Orban Optimod-AM
unit.
6.Concerning
the proposed high-powered AM transmitter in Norway.
To US
Consultant in Virginia for Northern Star, 2002
The
expected signal strength
over the UK from Radio Northern Star.
Note:
Point A=English Channel, B=NW Wales, C=SW Scotland,
D=N Scotland, E=Metro London, F=Midlands, G=Metro Dublin, H=Borders
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Star Media Services AS©, 1974-2017
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