sri, no RF output. Just a audio signal (+/- 1500Hz) via the sound card.
It is intended to be used with a HF TRX (most of them will not transmit below
1.8MHz) and then divide the (attenuated) HF signal down to MF or LF.
73, Rik ON7YD
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
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"?