Hi Joe,
I don't know that RX but what i recommend is using the soundcard of your PC (or
an external) as the RX, just as Paul Nicholson and Jim and Wolf and Markus and
Renato and...... did it. You do not need an extra RX. An extra usual RX is just
a source of frequency instabilities (offset and temperature drift). You have to
have a very stable frequency, say 8970,00 Hz +- 0,01 Hz. This can be reached by
using your soundcard and e.g. DL4YHFs Spectrum Lab(V2.75 b08 or higher
versions) and compensating the frequency drift by locking to a military
reference MSK signal that is available almost all over the world.
Then, in a first step you can watch the ALPHAs on 11904,762 Hz and watch your
accuracy. It should be an absolutely horizontal line!
Theoretically, this could be tried this evening :-)
Best 73 and good luck :-)
Stefan/DK7FC
________________________________
Von: [email protected] im Auftrag von [email protected]
Gesendet: So 06.06.2010 20:38
An: [email protected]
Betreff: Re: VLF: RX stations in Canada and US?
Hi Bill, Group.
Just returned from a one week trip inland (Ottawa). Yes, I'm near St
John's and have acquired an ITT mackay 3031A which might be satisfactory
for VLF RX. Any comments on the suitability of this RX would be
appreciated.
73 & TNX
Joe VO1NA
On Sun, 6 Jun 2010, Bill de Carle wrote:
> At 07:45 AM 6/6/2010, Stefan/DK7FC wrote:
> [..]
>> What about the canadian stations? These are in the shortest distance to EU
>> and will become a very important factor in some months when the QRN levels
>> decrease. Are there already stations who permantently monitor the dreamers
>> band (not the whole VLF) with a suitable RX system? Means, not only copying
>> the ALPHAs by ear but having a SLOW QRSS/DFCW window where DFCW-600 or
>> DFCW-6000 can be displayed. Here, it makes no sense to monitor the ALPHAs
>> and 8,97 kHz in e.g. 4 Hz FFT bandwith, what we need is 4 mHz! So, that one
>> DFCW element takes 10 minutes. Another important step is to have a STABLE
>> soundcard sample rate. This is well performed in the latest SpecLab
>> version. Alternatively a GPS synchronisation or so is necessray!
> [..]
>> What do the canadians or US stns think about that? Any REAL interest?
>
> I have the necessary frequency stability/accuracy either already in place or
> easily arranged and I'm certainly interested, but unfortunately I live inland
> about 1000 miles from the East coast of Canada (the best Rx location would be
> somewhere around St. Johns Newfoundland). Nevertheless, I'll see if I can
> receive the Alpha signals for a start. I've been monitoring your experiments
> and you guys have me all excited about this VLF stuff!
>
> 73,
> Bill VE2IQ
>
>
>
<<winmail.dat>>
|
