Date: Wed, 13 Apr 2011 20:49:36 -0230 (NDT)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <4DA5ED12.7040103@telus.net>
Message-ID: <Pine.LNX.4.64.1104132043530.19202@plato.ucs.mun.ca>
References: <4DA4C478.8000300@iup.uni-heidelberg.de> <4DA596F8.7010007@iup.uni-heidelberg.de>
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Subject: Re: VLF: field strength as a function of frequency curve...
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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 powerfu=
l.=20
> 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=20
> shack on a daily basis.  The driver stage is complete and tested and I=
 start=20
> the h-bridge tonight.
>
> Hoping for low power tests this weekend into the 0.5km Earth loop and wh=
en my=20
> vast horde of caps arrives I'll run QRPP tests into the loop before jack=
ing=20
> up the juice.
>
> More details soon.
>
> 73 Scott
> VE7TIL
>
> On 4/13/2011 11:16 AM, Stefan Sch=E4fer wrote:
>> Ah OK, sorry Scott. I haven't proved the document, just forwarded the=
 link=20
>> and checked the first page. Theoretical stuff isn't my central interest=
,=20
>> you know ;-)
>>=20
>> 73, Stefan/DK7FC
>>=20
>> Am 13.04.2011 18:02, schrieb Scott Tilley:
>>> Hi Stefan/group
>>>=20
>>> This looks it may be the link or at least a very interesting one:
>>>=20
>>> http://www.navy-radio.com/manuals/0101-1xx/0101_113-02.pdf
>>>=20
>>> 73 Scott
>>> VE7TIL
>>>=20
>>> On 4/13/2011 5:28 AM, Stefan Sch=E4fer wrote:
>>>> VLF,
>>>>=20
>>>> Am 12.04.2011 23:30, schrieb Stefan Sch=E4fer:
>>>>> VLF,
>>>>>=20
>>>>> I've just got these graphs by a SWL (or better LWL) out of an unknow=
n=20
>>>>> paper.
>>>>=20
>>>> Now i've got the URL for this document:
>>>>=20
>>>> www.navy-radio.com/manuals/0101-1xx/0101_113-06.pdf
>>>>=20
>>>>=20
>>>> 73, Stefan/DK7FC
>>>>=20
>>>>=20
>>>>=20
>>>>> It shows the results of field strength achievements as a function of=
 the=20
>>>>> TX frequency for different distances and a given TX power.
>>>>> Have we all known about this? Me not ;-) Now i understand why the=20
>>>>> military stations are located mostly between 15 and 25 kHz...
>>>>> But 8970 Hz is not much worse, at least distances below 4000 km...
>>>>>=20
>>>>> But that graph tell me it is rather difficult to reach TF3HZ or 4X1R=
F on=20
>>>>> 5170 Hz. Anyway we'll see...
>>>>>=20
>>>>> 73, Stefan/DK7FC
>>>>=20
>>>>=20
>>>=20
>>=20
>>=20
>
>
>

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