Initial success with cost-effective 6m WSPR + 2m FT8 beacons

Our 6m WSPR beacon design works fine now. The key is to use a 25 MHz high-quality TCXO, like the 25 MHz HCI 0.5ppm TCXO!

2m WSPR is still out of reach for this VFO design - see the following drifty screenshots:

While WSPR is no bueno, 2m FT8 works pretty fine!

Of course, the next challenge is to get 2m WSPR beacons working at a low-cost.

References:

• https://github.com/kholia/Easy-Beacons-STEM

• https://github.com/kholia/Si5351-Module-Clone-TCXO/tree/master/Si5351-Trimmed-Module-25-MHz

• https://github.com/kholia/Easy-Beacons-STEM/tree/master/Amplified-WSPR-Beacon-v3-Production/Pico-Beacons-NTP-TCXO-FT8-v2