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LF: LF/9v1

To: [email protected]
Subject: LF: LF/9v1
From: "Laurence KL1X" <[email protected]>
Date: Thu, 26 Apr 2007 05:27:36 -0800
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What ho - we are down in Singapore apartment hunting (no way can we afford a house here by the looks of it....)
Ive thrown out the LF probe out of the hotel balcony - into the SDRIQ, and
its a cut of a thousand lightning strokes...can barely hear Loran this
Its been poor weather here for the past few days so little chance of dx.

Any one done any short studies of lightning emfs' at different freqs? - Ive read a few saying most/some of the power is at VLF, stroke source/target, length and angle dependant, but Im definately seeing a cut at around >400Khz - below this the noise rises to be pretty flat but above 400Khz its amplitude is generally many dbs/octave down - this just due to propagational modes? Doesnt seem to matter day or night too much - perhaps my probe has some issues, but I see the same on most antennae....
Singapore, rainy, stormy....

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