Aha, LoPy 1.7.8-b1 micropython 1.8.6-724 loran 1.0.0 Alright I'm going to update the lot. Maybe some hints in the doc like micropython does with the different versions....

@danielm Not that I know of. Personally - but I'm no RF expert - I'd just stick the known values into an online calculator such as https://www.eeweb.com/toolbox/pi-match

Ugh. Not everyone is willing to have a github account.