A Study of Nighttime LF Signal Strength variations
During next two months it will be possible to measure
the signal strength of 7 existing UK Decca chains.
My aim is to measure them daily 21-22 UTC, if possible.
Only Green frequencies will be checked, due to QRM etc.
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127.8 N Scottish (6C), Lerwick, 1435, 280,
126.7 Northumbrian (2A), Peterhead, 1565, 269,
128.5 Hebridean (8E), Butt of Lewis, 1766, 276,
127.0 N British (3B), Neston, 1871, 257,
127.5 English (5B), East Hoathley, 1890, 247,
128.2 Irish (7D), Dungloe, 2060, 267,
126.4 SW British (1B), St. Mary's, 2282, 253,
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kHz Decca Chain / Station d,km AZI
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128.93 Mainflingen (EFR) (Reference stn) 1553, 228,
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(R&S ESH2/---- 10m coax---/1:10/---15m wire-----):
Noise level with antenna: with 200Hz IF BandWidth:
-24..-22 dB(uV), -131..-129dBmW (varies w qrm etc)
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NOTE: The ultimate goal here would be the measured
(indicated) FIELD STRENGTH (Fs) (in dBuV/m).
In everyday practice it is seldom possible to
measure Fs, so the RECEIVER INPUT VOLTAGE (dBuV)
converted to RECEIVED POWER will be given (dBmW).
Later, during warmer wx conditions it should be
possible to make parallel measurements using
calibrated R&S HFH2-Z2 antennas to obtain the
approximate system correction factor for my poor
15 m wire, which should be rather non-directional.
QUESTION: Can anyone tell where to ask for a
battery connector for my R&S ESH2 Meas Receiver?
Type is: Lemosa, Type F.c 2304 6,7 (see below)
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73 from Vaino, OH2LX (60N34 024E58) KP20LN
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V.K.Lehtoranta, OH2LX, POBox 50, FIN-05401 Jokela, Finland
------ Tel: +358-9-4173965 ---- Fax: +358-9-4173961 ------
E-mail: [email protected] - alias: [email protected] & [email protected]
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