Hi Dimitris,
Am 10.10.2015 02:21, schrieb Dimitrios Tsifakis:
Hi Stefan,
new callsign and new QTH indeed. I am now outside the city, the
nearest house is about 300m away from mine. I also have some space,
about 20 hectares, so expect more traffic on LF/MF :-)
Wow, great great great!! Take use of the possibilities that you have!
I'm still inspried by this WSPR spot:
2013-02-16 16:44 VK1DSH 0.475078 -29 0
QF44ms 50 F6CNI/BEV JN19qb 16832 310
BEV! That's it. Can you build a beverage antenna on your new QTH?
Maybe 3 Lambda on 630m? :-) You know, i would do so! :-)
Also it is very impressing what M0LMH receives in daytime here. The
location and antenna construction is very important on MF i think. I
belive there are effects that are important and that or that's
importance we don't know yet!
OK, so the beginning of each software project is the gathering of
requirements. Let me hear your suggestions. So far, we have the
following:
- works on raspberry pi with linux and uses GPIO4 (pin 7)
- does normal QRSS and DFCW QRSS
- command line
-?
Well, the C-file for WSPR is already existing. So the Pi can be told to
transmit on a certain frequency for a certain duration and then on
another frequency for another durartion and so on. So QRSS /DFCW could
be "just" some adaption/modification to the existing code.
There could/should be a number of options like
- [ -B ] beacon mode
- [ -E 0500 ] stop time is 05:00 UTC
- [ -S 0.2 ] 0.2 Hz DFCW-shift (if this parameter is not used in the
command line, i would choose a certain ratio of DFCW shift and dot
length. Then the DFCW shift is set automatically)
- [ -R 2.5] Dash/Dot ratio is 2.5 for QRSS (3 without setting this
parameter)
So, for example:
sudo ./[mode] [dot length] [frequency] [parameters] [message]
e.g.
sudo ./dfcw 90 136172.5 -B -E 0630 "dk7fc "
=> transmits a DFCW-90 beacon on 136.1725 kHz until 06:30 (system
time) with the message "dk7fc "
That would be great!!! :-)
More ideas?
73, Stefan
I will probably reuse some existing code, let me think about that.
73, Dimitris VK2COW/VK1SV/SV1DET
2015-10-10 11:09 GMT+11:00 DK7FC <[email protected]>:
Hi Dimitris,
Oh, you have a new callsign! Did you move your QH also?
Well, i've searched a bit more and didn't find a suitable tool. Strange!
So, if you really are an expert on programming, i would be happy to use your
software! Will you adapt it to the existing tools, using them and modifying
them?
Looking forward...
73, Stefan
Am 09.10.2015 02:24, schrieb Dimitrios Tsifakis:
Hi Stefan,
if there is nothing else out there, I would be happy to write a simple
c program to do this...
73, Dimitris VK2COW
2015-10-09 11:13 GMT+11:00 DK7FC<[email protected]>:
Hi all,
I'm trying to find a (or the "best") software for the Raspberry Pi to
transmit QRSS/DFCW on LF/MF. Since it's easily possible to transmit WSPR,
it
cannot be a problem to transmit QRSS.
Which is the easiest to handle software? And recommendations?
I imagine the tx command could be for example sudo ./qrss 3 137700 cq
dk7fc
jn49ik k
73, Stefan
PS: It has to be a console usable software, no GUI!
|
|
