On Wed, 18 Feb 2009 20:57:00 GMT, (Mark Zenier)
wrote:

In article ,
Frnak McKenney wrote:

Big Snip.

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

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

Is that set of articles available on the web? That'd be an
interesting read.

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine Sometimes I even put it in the food

"Jim Thompson" wrote in
message ...

Is that set of articles available on the web? That'd be an
interesting read.

...Jim Thompson

The 5 parts were later combined into a separate reprint, sold by R-E.
Sections for theory and circuits, construction, testing. Then building a
passive tuner VLF-LF, and a final section on loop antennas. One of the five
sections is a Loran-C receiver!!
I have an original copy in perfect condition, 30 pages, glossy paper,
copyright 1984 by Gernsback Publications, Inc.

In article ,
Jim Thompson wrote:
On Wed, 18 Feb 2009 20:57:00 GMT, (Mark Zenier)
wrote:

In article ,
Frnak McKenney wrote:

Big Snip.

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

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

Is that set of articles available on the web? That'd be an
interesting read.


Some of them. I remember on of them coming up in a discussion
in one of the radio newsgroups, and someone posted a URL.

They are practical hobby stuff mostly. A VLF converter, how to match
longwire antenna, an active whip antenna, a balanced loopstick. The most
useful non-hobby one was how to derive time/frequency references from
Loran-C.

I'm reluctant to go to the effort because this was back in the era when
R-E was paranoid about photocopying, with colored backgrounds for the
figures and charts, and it would take a day or two to photoshop the
scans so that they are of decent quality. Also, they were, near the end,
one of the more Internet savvy publishers and there may still be somebody
around to enforce their IP.

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

On Thu, 19 Feb 2009 20:12:06 GMT, (Mark Zenier)
wrote:

In article ,
Jim Thompson wrote:
On Wed, 18 Feb 2009 20:57:00 GMT, (Mark Zenier)
wrote:

In article ,
Frnak McKenney wrote:

Big Snip.

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

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)

Is that set of articles available on the web? That'd be an
interesting read.


Some of them. I remember on of them coming up in a discussion
in one of the radio newsgroups, and someone posted a URL.

They are practical hobby stuff mostly. A VLF converter, how to match
longwire antenna, an active whip antenna, a balanced loopstick. The most
useful non-hobby one was how to derive time/frequency references from
Loran-C.

I'm reluctant to go to the effort because this was back in the era when
R-E was paranoid about photocopying, with colored backgrounds for the
figures and charts, and it would take a day or two to photoshop the
scans so that they are of decent quality. Also, they were, near the end,
one of the more Internet savvy publishers and there may still be somebody
around to enforce their IP.

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)



Send them to me. I can work magic with a scanner ;-)

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

I love to cook with wine Sometimes I even put it in the food

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 at
http://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)

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