The following text is from the manufacturer:

“Now the same Top Gun Modulator MD-1 circuits used in the new Magnum radios are available for most other 10- meter and many CB radios. Full tone, clear, high swing audio (AM) modulation is achieved with the addition of this fully assembled micro circuit board.  Installation is accomplished with the removal of up to 3 resistors and the connection of 7 to 9 pre stripped and tinned wires.

Instructions are included for current and past production compatible radios. Additional Web support is available at www.TopGunTec.com. These circuits work with or without the modulation limiter. For the purest, the limiter can be adjusted for excellent forward swing without any square wave audio.

On 30-50 Watt radios, the dead-key or carrier can be set to 2 Watt or less with a modulation swing to the full output potential of the radio transmitter. The modulator can be switched to normal swing with the installation of an optional SPST or SPDT switch. Even in the normal swing mode, the Top Gun Modulator is still working to keep the audio clean at all power levels.

See the Peak Power difference