Optional high IP3 preamplifier module

Small low noise preamplifier module with 2SC5551 transistor.

Read moreShow less
50.82 € (tax incl.)
50.82 €
42.00 € (without tax)
in stock, shipped in 2-3 days

Price history     Price history

The lowest price in the 30 last days was 50.82 €

Add to compare0
Add to wishlist

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 18 dB  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.


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

Main functions

  • 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 18 dB
  • Bypass relays
  • You can set transistor bias as you need by trimmer
  • High quality relays with TWO contact parallel
  • Pin header 2.54mm 20 mm long
  • Two mounting holes M3
  • Two mounting spacer bolts M3x20mm long included
  • PCB size 50x50.4 mm


  • 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

Available as

ASSEMBLED: ready to use

Included in package

Optional preamp assembled and tested
2 pieces mounting spacer bolts


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

optional preamp module assembled by qro.cz hamparts.shop

optional preamplifier 2sc5551 table by qro.cz hamparts.shop

Example of the implementation in own design

example of implementation optional preamplifier module by qro.cz hamparts.shop

Read moreShow less
Product Details

Data sheet

pcb module
both 50 & 75 Ohm
front-end protection
frequency range
0.1 MHz to 60 MHz
PCB dimensions
50x50.4 mm
product weight (brutto)
0.07 kg
package dimensions
12x10.5x4.5 cm
No comments

Leave a review

  • rating:
Describe this product using simple and short words.
Upload images:
Drop images here or click to upload.
You may also like
291.61 € (tax incl.)
This RX Audit splitter/switch is very powerful device combines TRX switch, RX splitter, RF limiter protection for both RX outputs, INBAND RX antenna input and optional RX preamplifier. You can share your main TX/RX...





Create a free account to save loved items.

Sign in

Create a free account to use wishlists.

Sign in