This Drake L-4 & L-4B RCA Adapter. is made to Replace the 2 Pin Keying Line Socket so you can easily interface to your modern or vintage transceiver to the Drake L-4 or L-4B Linear Amplifier.
This kit comes with the custom plate to replace the 2 pin VOX plug, and mount an RCA connector which is commonly used with amplifiers. This is a great addition to a great amplifier!
This kit will also fit the AC-4 power supply VOX socket.