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DJ4KI > VLF 25.06.96 07:45l 64 Lines 2643 Bytes #-10979 (0) @ DL
BID : P66DB0ABH008
Read: DL5MAV GUEST DF6VB
Subj: Anmerkung zu GRAM22
Path: DB0KCP<DB0ZKA<DB0LX<DB0RBS<DB0SEL<DB0ZDF<DB0SRS<DB0ABH
Sent: 960625/0641z @:DB0ABH.#BAY.DEU.EU [BayComBox Nuernberg] BCM1.37h
From: DJ4KI @ DB0BOX.#BAY.DEU.EU (Rue)
To : VLF @ DL
Zum Testen des Programm GRAM22 sind folgende WAV Dateien bei mir
erhaeltlich:
( man kann sie natuerlich auch selber im Internet abrufen >300 kByte )
VLF1.ZIP GUIDE TO FILES CONTAINED IN THIS ZIP FILE:
---------------------------------------------------
All Natural Radio recordings were recorded by Stephen P. McGreevy
using the McGreevy WR-4B E-Field VLF receiver and 10' (3 meter)
vertical antenna. Tape recorder used was a Marantz PMD 212.
Files were converted to .WAV files using a SoundBlaster 16
card and Wave 'OLE or WaveEditor. The following files were
recorded at 8 bit, 11 kHz sampling rate. (The antenna and front-
end circuit of the WR-4B whistler receiver was temporarily attached
to my van via bungee cord) and the control box sits next to beds in back.
1) HUGH_WHI.WAV Huge whistler (very strong), moderate diffusion
7.5 sec. recorded 17 Sept. 1993 20 mi. west of Wendover,
NV at around 6:30 am PDT (1330 UTC).
2) LOUD_WHI.WAV Another strong whistler, same location as above
8.5 sec. within 10 minutes of the other one. Initiating
sferic "tweek" clearly obvious!
3) LOUDWHI2.WAV VERY LOUD Mod. diffusion whistler with weak
9 sec. diffuse echo accompanied by triggered emissions
at time of whistler.
4) PURENVWH.WAV 04 June 1993, 60 miles NNE of Reno, NV, 1430
19.5 sec. UTC, 7:30 am PDT. Weak Dawn Chours (minor
mag. storm in progress with weak background
layer of sferics plus very strong sferics
from lightning within 100 mi. of receiver.
A strong, pure whistler of slow descending
rate occurrs after one of these semi-
local lightning sferics.
5) WHIS4194.WAV 01 April 1994, 1130 UT/0330 PST, 100 mi. north
of San Francisco, CA in Mendocino Co. (Fish
12.5 sec. Rock Road 20 mi. west of Ukiah). Clusters
of nearly pure whistlers occurred all night
and were quite beautiful! This segment has
2 strong and 2 very weak whistler.
Natural Radio emissions such as these occur in the 0.1 to 11 kHz radio
spectrum--essentially, they are audio-frequency radio waves! This is
just a small variety of fascinating "sounds" to be received at these
ELF/VLF frequencies. You must be located at least 1 to 2 miles from
any power-lines so their "hum" is not received. This is why I like
to listen in the NV high-desert and Great Basin Area--plenty of open
spaces!
A hand held version of the WR-4B is available for $105. Contact
Steve McGreevy at: S.P. McGreevy Productions, 45 Elda Drive, San
Rafael, CA 94903. E-mail: spmcgrvy@ix.netcom.com -- or --
s.mcgreevy@genie.geis.com
73 de Rue ( DJ4KI @ DB0BOX )
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