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Preamp BOX with 2N5109

RX preamplifier with variable gain, protections and power over coax.

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connector
  • F
  • PL
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Description

This RX Preamplifier module BOX with 2N5109 transistor is based on W7IUV design. You can use it as high IP preamplifier for RX antennas (beverage, DHDL, flag etc.). Gain is up to 18 dB and there is also build in variable ATT. You can easy set the gain as high as you need! As well you can set right transistor bias with multi turn potentiometer. Two relays offer bypass switching if there is no power supply voltage. You can use external power supply connected to the box or the bias tee box for power over the coax.


Using

  • High IP RX preamplifier - RX antennas
  • Buffer amplifier
  • Driver amplifier

Main functions

  • Broadband: 0.1 MHz to 30 MHz
  • Very high IP3
  • Gain up to 18 dB
  • High output power up to 26 dBm
  • Variable ATT for gain 0 to 18 dB
  • Bypass relays
  • Front-end diode protection - ON/OFF by jumpers
  • Power over coax with the Bias Tee BOX
  • You can set transistor bias as you need by trimmer
  • High quality relays with TWO contact parallel
  • High quality connectors
  • IP56 box - recommended to protect it against water
  • Feeder size 100x100 mm
  • ASSEMBLED VERSION

Parameters

  • Supply voltage 12 - 15 V
  • Power directly or over the coax - bias tee - voltage 12 - 15 V
  • Supply current up to 180 mA include relays!
  • Gain up to 18 dB
  • REAL IP3 37 dBm for 18 V / 90 mA - more info on my BLOG

Available as

ASSEMBLED: ready to use
KIT: all parts + PCB and IP56 box - KIT VERSION
Connectors: PL SO-239 or F
PCB: only PCB

Manual

If you want to know more please check our wiki with Preamp Box manual.



version with PL SO-239 connectors

rx preamp box pl so-239 connector qro.cz hamparts.shop



version with F connectors

rx preamp box f connector qro.cz hamparts.shop



RX Preamp BOX with Bias Tee BOX

bias tee box dc with rx preamp box qro.cz hamparts.shop





rx preamplifier by qro.cz hamparts.shop



rx preamplifier by qro.cz hamparts.shop



Gain 50 kHZ to 1 MHz

measure rx preamp box qro.cz hamparts.shop





Gain 1 MHz to 70 MHz

measure rx preamp box qro.cz hamparts.shop





Input SWR, S11

measure rx preamp box qro.cz hamparts.shop
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Product Details

Data sheet

type
ASSEMBLED
design
in enclosure
usage
RX
impedance
both 50 & 75 Ohm
front-end protection
input and output
frequency range
0.1 MHz to 30 MHz

Specific References

ean13
1000090097033
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The RX small preamp is very simply low noise preamplifier module with 2SC5551 transistor based on W7IUV design. Use it as high IP preamplifier for RX antennas, buffer amplifier or small driver.
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A bias tee is used to insert DC power into an HF signal to power remote antenna amplifiers or other devices.
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A bias tee is used to insert AC or DC power into an HF signal to power remote antenna preamplifiers (DC), Bi-directional beverages (AC) or other devices.
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The RX small preamp is very simply low noise preamplifier module with 2SC5551 transistor based on W7IUV design. Use it as high IP preamplifier for RX antennas, buffer amplifier or small driver.
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