si5351 Replacement Module With TXCO (Smaller Size , no SMA connectors)

When we started work on our Whisper Mite WSPR beacon kit we found how poor the Clone si5351 modules that have flooded eBay. Aliexpress, Amazon and other such market places are. We soon swapped out to the orginial Adafruit module which was an improvement for sure but still didnt give us the protection from drift we wanted.
After some hunting around we could not find a module we could replace the Adafruit board with  that we like the performance of. So we designed our own replacemnt board and coupled it with a high stability TXCO  to make the drift problem just simply go away. our module uses a 0.5ppm stability oscillator over a wide range of tempratures , to give you some scale of improvement thats about 100 times more stability than the Clone boards and 50 times that of the orginial Adafruit board!
The import thing for you to be aware of is the board runs  with a 26MHz oscillator not the 25MHz or 27MHz of the clones or the Adafruit board. 

This is a one line change in any sketchs you may want to use. let me know if you need help with that.

We have this module in the same format as the Adafruit board (see other item in our shop) or a smaller format such as the one here. This smaller version does NOT have the option for PCB mounted SMA connector