Just FYI, i switched to my normal "1W" ERP on MF because i need the
Raspi for some other tests.
I see there are quite many stns "listening" to that time. Obviously it
becomes an active MF evening!
Unfortunately i have no time this evening (party) so i cannot join the
CW folks :-( But tomorrow!! :-)
73, GL, Stefan
Am 27.03.2015 14:53, schrieb DK7FC:
Am 27.03.2015 14:43, schrieb Rik Strobbe:
Hi Stefan, all,
And i wrote an email to PE1NNZ
and asked to a modification of the C-program to generate
a signal with 4x higher FSK
shift. Then it it would be possible to use that version for OMs having
a divide-by-4 stage in their PA (to get a perfect 50% duty cycle
and rectangular shape (after passing optocouplers etc)). This would be
a safe way to drive my QRP PA, testwise of course...
I have written such a program for windows (actually you can set
the devider ratio to any number between 1 and 100).
That way any HF TRX can be used to gerate a MF (or
LF) WSPR signal with
a simple CMOS ot TTL divider IC.
If anyone is interested just let me know ...
73, Rik ON7YD - OR7T
Hi Rik,
Sounds good but how does the windows PC generate the RF? You know, the
Raspi directly generates a "tone" at 475 kHz (or any other frequency up
to 250 MHz), not at 1500 Hz.
Anyway it is interesting. Does your program provide time sync and a GUI
to type callsign/locator/erp and a "duty cycle"?
73, Stefan
|
|
