Signal Echo Foxtrot

Location
Broadcast tower LP8 is located North-East of Montgomery County Reservoir. Upon activation you receive the Radio Signal Echo Foxtrot in Morse. It is one of nine drainage chambers broadcasting such a signal. Just east of the tower is the source, a Sealed Cistern just over the cliff face. Check your local map.

Morse code
The station transmits:

So overall it says: "Calling anyone this is Echo Foxtrot listening". Basically, "listening" is actually saying "I am awaiting reply".