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 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. 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 create 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 100-200 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 the normal swing mode, the Top Gun Modulator is still working to
keep the audio clean at all power levels.
P-P 1KHz Sine Wave At Mic Input
AM Modulated Signal With
The Top Gun Modulator In The OFF Position.
Same Modulated Signal
With The Top Gun Modulator In The ON Position