Electronics for Radio Surveillance & Monitoring - SIGINT/COMINT
Military - Government - Commercial
The PRE-20 and PRE-78 are pre-amplifiers designed to improve reception of weak signals, and in remote installations such as head-end equipment or mast mounted applications, to compensate for long feed line losses. These pre-amplifiers can be used with any receiving equipment in the frequency range specified They are specifically designed to compliment our VHF/UHF multicouplers, both pre-amplifiers has built-in RF power limiting circuitry Optional conformal coating is available for high humidity installations. With an optional “Bias-Tee” they may be powered remotely. Die cast aluminum enclosure with powder coating ensures long life in the most stringent installations.
General Information -Receive Pre-Amplifiers
700/800 MHz Pre-Amplifier
Stridsberg Engineering, LLC. - Shreveport, Louisiana, USA - (318) 861-0660
VHF/UHF Low Noise Receive Pre-Amplifier - 40 MHz to 1GHz
The model PRE-20 is a commercial/government grade low noise, broad band, VHF/UHF receive pre-amplifier for use in the 40 MHz to 1 GHz frequency band. It is designed to improve weak signal reception on scanners or other wide-band radio receivers, including spectrum analyzers and related equipments used in signal intercept platforms, trunk tracking applications or for general monitoring in this band. The PRE-20 is part of a system of components for the VHF/UHF service band and may be used in conjunction with our receiver multicouplers models MCA208M, MCA204M and MCA804B.
This pre-amplifier features internal RF relays for by-pass switching and can be left inline when not needed. A RF Power limiting front-end with High-Pass filter preceding a low noise amplifier results in a very robust pre-amplifier It may be mounted remotely in an equipment cabinet, or near the antenna, and DC powered via the coax using an optional "Bias Tee". It is designed to drive long runs of coaxial cable to overcome feed line losses, or, may be used in any configuration when weak signals needs to be received. The PRE-20 is housed in a cast aluminum enclosure for ruggedness, high reliability and mechanical stability required in many demanding commercial and government installations. Black powder coating and a Lexan overlay panel will stand up for many years of service.
Gain: 18 dB (+/- 2 dB in Passband)
Frequency Range: 40 MHz to 1 GHz (nominal)
Noise Figure: 3.5 dB (nominal)
P1dB: +12 dBm (output) OIP3: +24.5 dBm
Insertion Loss (By-pass mode): < 2 dB (25 MHz to 1 GHz)
Impedance: 50 Ohms (In/Out)
Connectors: BNC (standard), N and TNC optional
Power Required: +12 Volt DC (nominal) @ 125 mA
Enclosure: Cast Aluminum with black powder coating
Size: 5.5 X 2.25 X 1.25 Inches`
Specifications: PRE-20 Pre-Amplifier
Options:
(1): EMI/RFI Ceramic feed-thru for DC power hardwired connections.
(2): PCB Conformal coating for high humidity installations.
(3): TNC or N connectors
Please contact us for options 1 and 2
The model PRE-78 is a commercial/government grade low noise, UHF receive pre-amplifier for use in the 700 MHz to 800 MHz service band. It is designed to improve weak signal reception on scanners or other wide-band radio receivers, including spectrum analyzers and related equipments used in signal intercept platforms, trunk tracking applications or for general monitoring in this band. The PRE-78 is part of a system of components for the VHF/UHF service bands and may be used in conjunction with our receiver multicouplers models MCA208M and MCA204M.
This pre-amplifier features internal RF relays for by-pass switching and can be left inline when not needed. A RF Power limiting front-end with a microstrip band-pass filter preceding a low noise amplifier results in a very robust pre-amplifier It may be mounted remotely in an equipment cabinet, or near the antenna, and DC powered via the coax using an optional "Bias Tee". It is designed to drive long runs of coaxial cable to overcome feed line losses, or, may be used in any configuration when weak signals needs to be received. The PRE-78 is housed in a cast aluminum enclosure for ruggedness, high reliability and mechanical stability required in many demanding commercial and government installations. Black powder coating and a Lexan overlay panel will stand up for many years of service.
Gain: 18 dB (+/- 2 dB in Passband)
Frequency Range: 740 MHz to 860 MHz (nominal)
Noise Figure: 3.5 dB (nominal)
P1dB: +12 dBm (output) OIP3: +24.5 dBm
Insertion Loss (By-pass mode): < 2 dB (25 MHz to 1 GHz)
Impedance: 50 Ohms (In/Out)
Connectors: BNC (standard), N and TNC optional
Power Required: +12 Volt DC (nominal) @ 175 mA
Enclosure: Cast Aluminum with black powder coating
Size: 5.5 X 2.25 X 1.25 Inches.
Wall adapter included for the North American markets
Specifications: PRE-78 Pre-Amplifier
Options:
(1): EMI/RFI Ceramic feed-thru for DC power hardwired connections.
(2): PCB Conformal coating for high humidity installations.
(3): TNC or N connectors
Please contact us for options 1 and 2
Wall adapter included for the North American markets
