Optional high IP3 preamplifier module for your own design

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:

• Info:
  • Broadband: 0.1 MHz to 60 MHz (11 dB @ 150 MHz)
  • Very high IP3
  • Good gain up to 18 dB
  • Low Noise Figure (NF) 1,2 to 2 dB (2,5 dB @ 150 MHz)
  • High output power up to 26 dBm
  • Variable ATT for gain 0 to 18dB
  • Bypass relays
  • KiCad library - build it in your design
• You can set transistor bias as you need by trimmer
• High quality relays with TWO contact parallel
• Pin header 2,54mm 20mm long
• PCB size 50x50,4 mm
• Two mounting holes M3 and two mounting towers M3x20mm long (included)
• Available as
  • ASSEMBLED and tested

Parameters:

• Info:
  • NPN transistor 2SC5551A
  • Supply voltage 12 - 14 V
  • BIAS current 10 to 70 mA
  • Supply current up to 180 mA include relays!
  • Gain: up to 18 dB
  • Low Noise Figure (NF) 1,2 dB (20 mA 50 MHz)
  • Low Noise Figure (NF) < 2 dB (60 mA 50 MHz)
  • Low Noise Figure (NF) 2,3 dB (20 mA 150 MHz)
  • REAL IP3 34 dBm

Use:

• Designed to be built-in your own hardware
• High IP, Low Noise RX preamplifier - RX antennas
• Buffer amplifier
• Driver amplifier

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

Download

OPTIONAL PREAMP MODULE ver 1.1
Schematic and board pic	sch	brd
KiCAD 6 library	KiCAD lib and 3D model279
We believe open source is a better way of doing things. View and download the Shield Schematic and PCB Kicad/Eagle CAD files, LibreCAD .DXF, or Inkscape .SVG files. Please, do not steal our designs for your commercial use! The hardware designs are released under the Attribution-NonCommercial 2.0 Generic