On Feb 22, 11:57*am, Frnak McKenney
wrote:
Mark,

Thank you for joining in.

On Wed, 18 Feb 2009 20:57:00 GMT, Mark Zenier wrote:
In article ,
Frnak McKenney wrote:

Big Snip.

And much appreciated by me and others. grin!

Go find Radio-Electronics magazine for 1983, and read the five(?)
articles by Ralph Burhans about receiving VLF.

I ran across one article he wrote, in PDF format, but couldn't
locate the articles. Have you seen them posted anywhere?

Also, Dr. *Barry Ornitz was kind enough to send me a PDF file
describing two books available from the ARRL online store athttp://www.arrl.org/:

* Mike Dennison and Jim Moritz: LF Today
* Peter Dodd: The Low Frequency Expermenter's Handbook

He also took the time to offer a description of why a JFET input
matches a high impedance. *The words seem to fit together, but I'm
still working on downconverting it to a frequency low enough for my
brain to accept. *grin!

Frank
--
* ÿPeople demand freedom of speech to make up for the freedom of
* *thought which they avoid.ÿ -- Soren Kierkegaard
--
Frank McKenney, McKenney Associates
Richmond, Virginia / (804) 320-4887
Munged E-mail: frank uscore mckenney ayut mined spring dawt cahm (y'all)

The first time I tried to dabble with VLF the rx front end I found
from an university paper was nothing more than a triode(probably 1/2 a
12AX7) amp using a couple of TV horizontal osc coils as the tank
circuit. After breadboarding the rx up on an old TV chassis I kept it
around for a few years soon loosing interest in the CW and man made
data transmisssions. There seem to be quite a few naturally occuring
sources of RF in that band that sound interesting, some almost
musical.

Jimmie