Wow, NDBs are rapidly going the way of the Dodo bird, it seems.  Latest from NAV Canada regarding Miramichi, NB:

Miramichi NDB – The NDB (F9) located at the Miramichi, NB (CYCH) airport is being decommissioned. As a result of the NDB being decommissioned the two NDB approaches at Miramichi (NDB RWY 09 and NDB RWY 27) will be revoked and removed from the Canada Air Pilot on October 5, 2023. The two GNSS approaches (RNAV (GNSS) RWY 09 and RNAV (GNSS) RWY 27) will remain unchanged with the existing approach minima that are lower than the NDB approaches that are being revoked. Additionally, the A8 Airway between Miramichi, NB and Moncton, NB will also be revoked. NAV Canada are seeking any feedback, issues or concerns pertaining to this upcoming change by Friday, September 22, 2023. The Notice of Change with details to provide feedback can be found here.

Of course, no frequency is mentioned.  It’s 520 kHz with 125 W, so one that likely gets out very well.  I remember seeing the antenna at the airport while visiting 1 year ago (at the south end of the airport, adjacent to the terminal). 

73,  Walt Salmaniw to WOR iog (2023-09-22)