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Northern Star International Broadcasters AS presents
Essays by Knut N.Stokke.

Find his CV by clicking here

1. Boelgeforplantning paa lang-og mellomboelge(Long-and Mediumwave propagation)(Teleelektronikk 1/1974)(In Norwegian)

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Page 2 Field Strength curve 1 10 kHz-10 mHz
Page 3 Field Strength curve 2 for 10 kHz-10 mHz
Page 4 Wavefronts for two frequencies
Page 5 Older version of Ground Conductivity map for Norway
Page 6 Field strength curves for 700 kHz
Page 7 Field strength curves for 200 kHz, near to Radio Norway International!
Page 8 Ground-Wave propagation for different values on 210 kHz, near to Radio Norway International! ITU 717-2
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Page 10 The Eckersley method
Page 11 The Millington method
Page 12 The Millington method-transfer for good to bad conductivity
Page 13 The Millington method-transfer for bad to good conductivity
Page 14 Resulting curve for multi-hops
Page 15 Recovery-effect
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Page 17 Field strength curves for skywave propagation
Page 18 Correction curve for magnetic dip and Correction curve for time deviation from midnight
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Page 20 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
Page 21 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
Page 22 Coverage with different power levels
Page 23 3/22 Sea Gain. ITU 435-7 A single terminal at the coast, LW/MW
Page 24 New Field strength curves for 200 kHz, near to Radio Norway International!

2. Some graphical considerations on Millington's method for calculating field strength over inhomogeneous earth(Telecommunication Journal 42/III 1975.)

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3. Resultater fra LF/MF-konferansen(Results from the LF/MF Conference(edited)(Teleelektronikk 4/1977)(In Norwegian)

Page 1 Conductivity with different types of ground
Page 2 Examples of The Millington method+ Sea Gain. ITU 435-7 same as page 23 above, but in Norwegian
Page 3 For the first time we are able to publish RMC Roumoules' 216 kHz directional diagram(300 kW emrp) to the North. Our station location is indicated by means of the LKS Kvitsoey(Stavanger) facility, 1314 kHz 1200 kW
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4. Ground conductivity measurements(Telecommunication Journal 51/II 1984.)

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Page 3 Measured field curve drawn into the curves for different conditions in the actual field range

5. Some Quality and Coverage problems in Audio Broadcasting.(Teleelektronikk 2/2000)
How the signal of LKO Oslo/Kloefta 200kW(our predecessor) was improved.

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Norkring AS has used processing since the 70s and currently at LKA Vigra employs one Orban Optimod-AM unit.
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6.Concerning the proposed LF transmitter in Norway. The expected signal strength over the UK from Radio Norway International. The original document already published in condensed form in the Signal Projections part of our website. Note: A=English Channel, B=NW Wales, C=SW Scotland, D=N Scotland, E=Metro London, F=Midlands, G=Metro Dublin, H=Borders

How will Radio Norway International do versus co-channel competition?
All rights reserved: Knut N.Stokke© and Northern Star International Broadcasters AS©, 1974-2009

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