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