Hi Art,
The 40m Spectrometer is in the process of being relocated to a new
QTH. It was in the urban QTH of William, PY2GN, but William had to
move and for a few weeks the spectrometer was temporarily in the QTH
of William's friend. It is currently off-the-air and will be
reactivated in William's rural QTH, a much quieter location.
73,
-- Edson, pu1jte, n1vtn, 7n4ncl
--- In softrock40@..., KY1K <ky1k@p...> wrote:
Although it's not a softrock, there is a 40 meter QSD based 40 meter
receiver on the internet, it is not full time. Several weeks ago, I
sent a string of slow cw and was able to see my signal on the screen
as it was received in South America.....which was neat.
Don't know if it's still up.
Try
There are also quite a few LF monitoring stations connected via the
nternet, although these are usually very expensive receivers
dedicated to this function full time and they display visual
snapshots of the spectrum rather than making audio available.
Typically, they monitor the lowfer (160-190 Khz) license free band
and the 137 Khz ham bands (for most of the world, or part 5 license
band for the US at 137 Khz).
Despite my best efforts to publicize the softrock type receivers, the
general population tends to think a Kenwood or Yaesu megabucks
receiver is the only receiver worth using. I think these sort of
people are missing the boat, but that's a topic for another day.
I just finished my design for a 400 Khz to DC using an inexpensive
crystal oscillator module and a programmable divider. It does not use
DDS or VCO technology. It is very inexpensive to build and makes use
of a programmable divider to cover 400 Khz and below. I'm happy to
email the schematic to anyone who is interested in it.
I'm looking for a 12.8 Mhz TCXO or OXCO for the prototype although
most users will not need the high stability oscillator. If anyone has
a source for them at reasonable prices, please email me (off list).
Regards,
Art
This is a terrific idea, what a wonderful concept. The
possibilities are
infinite. Wish I knew enough to help out, but please pursue this
line of
thinking. A world wide receiver linked by the Internet, Wow :-)
John Melton wrote:
First I would like to say how impressed I have been with the little
SoftRock40 and the PowerSDR software. It has been a long time
since I
have worked HF and this has really got me interested again.
Thanks to
everyone who has put this together.
I have been thinking about putting the SoftRock40 on the
internet with a
simple server reading the I/Q signals and serving them to
clients that
connect (limited by my uplink speed). What is interesting about
this is
that each client can then independently tune across the passband
of the
receiver. Imagine a whole network of these little receivers
around the
world. Want to check out the conditions on 40 Mtrs in Europe - just
connect to one in Europe and tune around!
I am a Unix/Linux/Java software engineer by profession and have good
development systems for these environments. I do not have any
Microsoft
development systems - note the email address ;-).
I have downloaded the Linux code and am currently working on
this to use
a socket connection to receive the I/Q data, and also looking at
implementing a GUI interface - possibly in Java.
Would anyone be interested in helping with this development? In
particular I would be looking for someone that would be prepared
to look
at the PowerSDR Windows code to modify it to get the audio data
from a
socket rather than the audio device or a Wave file.
let me know what you think and if you can be of any help.
Regards,
John Melton, g0orx/n6lyt
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Regards,
John
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