Now the same Top Gun Modulator MD-1 and Compressor CP-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 these two fully assembled micro-circuit boards. While the Top Gun Modulator works only in AM, the Top Gun Compressor works in AM, FM, and SSB, keeping the modulation at peak performance in all these modes.

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

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. Without the limiter, the compressor maintains high-level audio without severe squaring of the audio signal. It is the squaring of the audio peaks that creates the distortion and splatter of adjacent frequencies.

On 30–50 Watt radios, the dead-key or carrier can be set to 1 Watt or less with a modulation swing to the full output potential of the radio transmitter. On 100- For 200-watt radios, the dead-key or carrier can be set to 10–15 watts with a modulation swing to the full output potential of the radio transmitter. These high Power radios require the addition of an optional 15 K resistor. The modulator can be switched to normal swing with the installation of an optional SPST or SPDT.

switch. Even in normal swing mode, the Top Gun Modulator is still working to keep the audio clean at all power levels.