Scott,
Glad to hear that you are going on VLF. It seems you have had better
luck than I had getting authorisation from Industry Canada. I cited
RSS210 which permitted a few hundred microwatts below 9 kHz but was
told my VLF TX would have to be "Type Approved" before it could be
operated.
73 and good luck below 10 kHz
Joe VO1NA
On Wed, 13 Apr 2011, Scott Tilley wrote:
No worries Stefan.
That's what makes having a group interested in the same topic so powerful.
We all contribute ideas and materials and eventually we all sort it out.
Very interesting stuff thanks for sharing.
My VLF TX is coming along very quickly now that I have abit of time in the
shack on a daily basis. The driver stage is complete and tested and I start
the h-bridge tonight.
Hoping for low power tests this weekend into the 0.5km Earth loop and when my
vast horde of caps arrives I'll run QRPP tests into the loop before jacking
up the juice.
More details soon.
73 Scott
VE7TIL
On 4/13/2011 11:16 AM, Stefan Schäfer wrote:
Ah OK, sorry Scott. I haven't proved the document, just forwarded the link
and checked the first page. Theoretical stuff isn't my central interest,
you know ;-)
73, Stefan/DK7FC
Am 13.04.2011 18:02, schrieb Scott Tilley:
Hi Stefan/group
This looks it may be the link or at least a very interesting one:
http://www.navy-radio.com/manuals/0101-1xx/0101_113-02.pdf
73 Scott
VE7TIL
On 4/13/2011 5:28 AM, Stefan Schäfer wrote:
VLF,
Am 12.04.2011 23:30, schrieb Stefan Schäfer:
VLF,
I've just got these graphs by a SWL (or better LWL) out of an unknown
paper.
Now i've got the URL for this document:
www.navy-radio.com/manuals/0101-1xx/0101_113-06.pdf
73, Stefan/DK7FC
It shows the results of field strength achievements as a function of the
TX frequency for different distances and a given TX power.
Have we all known about this? Me not ;-) Now i understand why the
military stations are located mostly between 15 and 25 kHz...
But 8970 Hz is not much worse, at least distances below 4000 km...
But that graph tell me it is rather difficult to reach TF3HZ or 4X1RF on
5170 Hz. Anyway we'll see...
73, Stefan/DK7FC
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