Construct LRL with World Receiver

[Funfinder]

For not losing fun with those LRL-stuff there has to be a way to build such stuff with already other devices - like with calculator and AM-Radio used as simple BFO.

Bought now a very small World-Receiver (Radio AM, 9 shortwave bands, FM). Very high sensitivity, costs 15 Euro and now transforming it into some kind of LRL - Bingo!