Mirage KP-2 User Manual

MIRAGE KP-2 Pre-Amplifier

Instruction

Manual

MAST-MOUNT GaAsFET PRE-AMPLIFIER

KP-2 Series

10M, 6M, 2M, 1-1/4M, 70 CM

Version A Copyright © 1996, MIRAGE Communications

Before operating this unit, please read these instructions completely.

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MIRAGE KP-2 Pre-Amplifier

MIRAGE KP-2 Mast-Mount Pre-Amplifier

General Information

This in-line GaAs-FET receive pre-amp provides high gain and low noise
amplification for weak receive signals. The KP-2 also has automatic RF­switching, which disengages the pre-amp any time it detects a
transmission signal being emitted by the tranceiver.

The KP-2 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 following is a list of associated parts shipped with the unit:

1 KP2RC Control Unit
1 1-3/4" U-Bolt
1 1-3/4" Cradle
2 5/16" Nuts with lock washers

KP2RC RF Line Voltage Control Unit

The RF line voltage control unit designated KP2RC requires that you
apply a positive 13.6 - 15 Vdc to the power jack positioned on the end of
the control box. The center pin is positive. When the KP2RC is turned
on, it places the DC voltage onto the RF signal line running up to the
antenna. The DC voltage is blocked at your radio by a coupling
capacitor. The mast-mounted KP-2 pre-amp is designed to pick this DC
voltage off the RF line and use it to power the pre-amp.

The RCA phono jack located on the side next to the RADIO connector
allows you to connect ON/OFF switching devices (such as an external
switch option on an SSB/CW radio) to the KP2RC. This option allows
you to automatically remove the DC voltage (by grounding the center pin
of the RCA phono jack) from the RF signal line any time your radio is in
the transmit mode.

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