Optional high IP3 preamplifier module for your own design

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This is small low noise preamplifier module with 2SC5551 transistor based on W7IUV design. You can use it as high IP preamplifier for RX antennas, buffer amplifier or small driver in your own design. You can download KiCAD library and simply add it to your magic hardware :) There is classic diode limiter at the input. Gain is up to 18dB and there is also built in variable ATT. You can set gain as high as you need! Amplifier has got low noise - lower than 2 dB up to 50 MHz and around 2,2 dB at 150 MHz. Transistor bias could be set by the multi-turn potentiometer. Two relays offer bypass switching if there is no DC voltage.

Main functions:

Parameters:

Use:



The measured values


Gain 10dB 0,5MHz to 50MHz

Gain 15dB 0,5MHz to 50MHz

Gain 18dB 0,5MHz to 50MHz

Bypass 0,5MHz to 50MHz



Example of the implementation in own design




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OPTIONAL PREAMP MODULE ver 1.1
Schematic and board pic sch brd
KiCAD 6 library KiCAD lib and 3D model34
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View and download the Shield Schematic and PCB Kicad/Eagle CAD files,
LibreCAD .DXF, or Inkscape .SVG files.
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The hardware designs are released under the
Attribution-NonCommercial 2.0 Generic