Hi Joe,
from what I can find in the web it tunes down to (only) 15kHz.
That's probably because below 15kHz synthesizer sideband noise would
be an issue.
My Sony CRF-1 tunes down to zero Hertz but you can
hear the increasing synth. noise below 15kHz .
But it's still possible to receive the three alphas at ca.12kHz and ca.15kHz.
Maybe when using the broadest filter with 8kHz you can get usable reception
at 8,97kHz.
For a first try I would look for the alphas at ~12kHz.
OTOH, >15kHz you can expect an excellent performance with this rx.
73
Clemens
DL4RAJ
----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Sunday, June 06, 2010 8:38 PM
Subject: 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
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