Mirage KP-1 Series Manuel utilisateur

MIRAGE KP-1 Pre-Amplifier

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

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

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.

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