Mirage KP-1 Series User manual

MIRAGE KP-1 Pre-Amplifier
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MIRAGE KP-1 In-Shack Pre-Amplifier
General Information
This in-line GaAs-FET receive pre-amp provides high gain and low noise
amplification for weak receive signals. The pre-amp has an attenuator
built into the circuit which can be selected by changing the position of a
switch on the internal circuit board. This switch is set in the LOW level
gain position at the factory. This has been included to prevent receiver
overloading and subsequent intermodulation distortion that can come
from very strong signals. The pre-amp also has automatic RF-switching,
which disengages the pre-amp any time it detects a transmission signal
being emitted by the tranceiver.
Specifications
−NOTE: Unless otherwise indicated, specifications apply to all models
of the KP-1 Series.
Frequency Coverage:
MIRAGE Model # Range
KP-1 / 10 Meter: 28.000 - 28.500 MHz
KP-1 / 6 Meter: 50 - 54 MHz
KP-1 / 2 Meter: 144 - 148 MHz
KP-1 / 1-1/4 Meter: 222 - 225 MHz
KP-1 / 70 Centimeter: 440 - 450 MHz
Gain: 20-25 dB (HIGH gain setting)
10-15 dB (LOW gain setting)
Noise Figure: 0.6 dB, independent of gain setting
Power Requirements: Positive 13.6 - 15 Vdc
Power Capability: 100 Watts, maximum
Connectors:
Antenna: UG-58N VHF connector
Radio: UG-58N VHF connector
Remote: RCA Phono jack
Power: 3.5mm DC Coaxial jack

MIRAGE KP-1 Pre-Amplifier
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Installation
The Mirage KP-1 connects in-line between your radio and your antenna.
The KP-1 requires a positive 13.6 - 15 Vdc power source. The center pin
of the 3.5mm coaxial power jack, located next to the RCA phono plug
labeled REMOTE, is positive. Plug your antenna into the 'N' type
antenna connector labeled ANTENNA, and your radio into the connector
labeled RADIO. Use good quality 50 Ohm coax between your radio and
the pre-amp, and RG-8U or equivalent between the pre-amp and your
antenna. If your radio provides remote keying, connect to the RCA
phono plug labeled REMOTE. Apply power to the KP-1 by toggling the
POWER switch towards the LED labeled ON.
MIRAGE KP-1 Pre-Amplifier
Figure 1

MIRAGE KP-1 Pre-Amplifier
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In cases of very weak signal reception, you may want to change the
factory preset gain level to the HIGH position. To do so, follow these
steps:
1. Remove the four screws in the cover.
2. Carefully pry open the cover.
3. Move the two white toggles on the black switch (located
approximately 1" from the RADIO connector) to the downward
position.
4. Replace the cover.
Technical Assistance
If you have any problem with this unit, first check
the appropriate section of this manual. If the manual
does not reference your problem or your problem is not
solved by reading the manual you may call MIRAGE at
601-323-8287. You will be best helped if you have
your unit, manual and all information on your station
handy so you can answer any questions the technicians
may ask.
You can also send questions by FAX to 601-323-6551.
Send a complete description of your problem, an
explanation of exactly how you are using your unit,
and a complete description of your station.