9-7A6 C
 What condition may exist if a VHF radio is operational in receive mode but unable to transmit?
A.  Excessive bias is being applied to switching transistors in the transmitter output stage.
B.  The solid-state antenna relay is no longer functioning properly.
C.  A component in the Push-To-Talk (PTT) circuit has failed.
D.  The SWR protection circuit has engaged to prevent transmission.
