VLF3.ZIP GUIDE TO FILES CONTAINED IN THIS ZIP FILE:
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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)  2WHIS494.WAV	01 April 1994, 1130 UT/0330 PST, 100 mi. north
			of San Francisco, CA  in Mendocino Co. (Fish
	30.5 sec.	Rock Road 20 mi. west of Ukiah).  Clusters
			of nearly pure whistlers occurred  all night
			and were quite beautiful!  This segment has
			many whistler os varying strength.  I really
			like this segment of the tape for its
			nice mix of whistlers and tweeks.

2)  AB_CHOR2.WAV	Beautiful Alberta Auroral Chours taped during
			a visible display of Aurora (Northern Lioghts).
	62 sec.		I was located 150 miles east of Red Deer, AB
			Near Consort, AB.  In this segment, squawking
			"chorus" is accompanied by a multitude of
			"sliding-tone emissions."  When these sliding-
			tones would be heard, the aurora wouls suddenly
			brighten up and move quicker.  Taped 26 Sept. 1993
			at 1110 UTC.

3)  ALB-CHOR.WAV	Another recording segment of Alberta Auroral Chorus
			as above.  Taped within 5 min. of above.
	42 sec.


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