hardNDB-ADF
The BFO (Beat Frequency Oscillator) on an ADF receiver is used to:
A
Increase the signal strength
B
Improve bearing accuracy
C
Filter out interference
D
Make the Morse code ident of an unmodulated CW NDB carrier audible
Checking member access
One moment while we confirm your plan so paid members never see checkout by mistake.
Checking member access before showing upgrade options
Keep practising
Take a timed quiz with random questions, or estimate your training costs.