The broadcast on Christmas Eve will happen:

http://alexander.n.se/uncertainty-around-the-christmas-eve-broadcast/?lang=en
The Alexanderson transmitter:

http://alexander.n.se/the-radio-station-saq-grimeton/the-alexanderson-transmitter/?lang=en

 

Generell referanse:

https://no.wikipedia.org/wiki/Radiostasjonen_i_Grimeton

http://grimeton.org/