What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?
To prevent key clicks on CW
To prevent transient overmodulation
To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output✓Bonne réponse
To allow time for the amplifier power supply to reach operating level
Explication
The keying line tells the amplifier to switch its transmit and receive relays, and relay contacts take milliseconds to move. Delaying the RF until they have settled prevents hot switching, in which RF flows while contacts are in transit and arcs across them, damaging the relay and generating clicks.