Drum Frequency Overlays

This Collins 75A-4 Frequency Drum Overlay, is for newer serial number units that cover the 15 meter band from 20.5-21.5 MHz (I also have this Overlay Available for early S/N 75A-4s that cover the 15 meter band from 20-8 to 21.8 MHz in another...

This Collins 75A-4 Frequency Drum Overlay, is for older serial number units that cover the 15 meter band from 20.8 to 21.8 MHz (I also have this Overlay Available for later S/N 75A-4s that cover the 15 meter band from 20-5 to 21.5 MHz in another...

This Collins KWS-1 Frequency Drum Overlay, is for newer serial number units with the 15 meter band starting at 20.5 MHz (I also have this Overlay Available for early S/N KWS-1s that with the 15 meter band starting at 21.0 MHz in another...