I have put my wspr beacon on the air for a test after the latest modifications. And so far it look promising.
Here is a picture of the mess 🙂
Picaxe wspr beacon. Bottom: Picaxe and DDS-60 :Top from right: 10MHz LPF, tripler and amplifier for clocking the dds-60 @ 30MHz
Here are some pictures of my second GPSDO.
This one, like my first GPSDO is based on the G3RUH James Miller desing.
Whats new with this is that I have added a Picaxe controller and a display unit for decoding the GPS NMEA-0183 sentences.
The display show various information decoded of the gps sentences.
But the main reason for building the MKII was that I needed it for controlling my DDS based WSPR Beacon.
GPSDO 10Mhz output drives the DDS and the micro-controller which steers the DDS.
The picaxe gps decoder take care of the keying of the beacon at the start of every tx period.
Ii’l will come back with a separate post regarding details of the wspr beacon.
