C-22-G Instruction Manual
R. F. Amplifier
1
C-22-G
R.F. AMPLIFIER
The Mirage C-22-G is the next generation of Power Amplifiers for 220 - 225 MHz. New
features make it the most useful and versatile amplifier available. Features include
automatic power shut-down circuitry for protection against excessive R.F. power input.
A newly designed GaAsFET receive pre-amp provides high gain and low noise
amplification for weak signal applications. The pre-amp includes a selectable attenuator
to reduce signal output level. This is useful in preventing Receiver Overload and
subsequent Intermodulation Distortion caused by strong signals. The Mirage C-22-G is
capable of FM, SSB, and CW operational modes.
SPECIFICATIONS
Frequency Range ....................................................... 220 - 225 MHz
R.F. Input Power (Drive)........................................... 0.4 - 4 Watts (5 Watts max.)
R.F. Output Power..................................................... 20 Watts with 2 Watts drive
Duty Cycle................................................................. Intermittent (ICAS)
Modes ........................................................................ FM, SSB, CW
Receive Pre-amp ....................................................... GaAsFET, Gain 21/15 dB-Nominal.
Noise figures less than 0.6 dB. 1 dB
compression point greater than -13
dBm input (Nominal)
R.F. Input Power Shutdown Point............................. In excess of 5 Watts nominal
Keying ....................................................................... Automatic (R.F. sensing)
Input/Output Impedance............................................ 50 Ohms
R.F. Connectors......................................................... SO-239 (UHF)
Supply Voltage .......................................................... 13.8 VDC (for full R.F. power
output)
Supply Current .......................................................... 4 Amps (nominal)
Fuse ........................................................................... Low voltage, fast blow. 7-1/2 Amps
Physical Dimensions ................................................. 3-1/2 x 2 x 7 inches
Weight ....................................................................... 1 1/4 pounds
INSTALLATION
The Mirage C-22-G may be mounted using the brackets supplied or simply placed in a
convenient operating position. In either case, there must be adequate ventilation for the
finned heat-sink. This generally means at least 1 inch clearance from the sink to any
surrounding enclosure and an unobstructed flow from the front to the back of the sink.
CAUTION: With extended use the heat sink becomes very hot.
If it is necessary to
extend the D.C. power leads, use wire of the same gauge in order to avoid a voltage drop
