Preamp module with 2N5109 OK2ZAW

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This is very simply preamplifier module with 2N5109 transistor based on W7IUV design. You can use it as high IP preamplifier, buffer amplifier or small driver. Gain is up to 18dB and there is also build in variable ATT. You can easy set 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.

Main functions:




The measured values

Gain 50 kHz to 1 MHz

Gain 1 MHz to 70 MHz

Input SWR, S11


Preamp module with 2N5109
Schematic and board pic sch brd
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View and download the Shield Schematic and PCB files.
The hardware designs are released under the
Attribution-NonCommercial 2.0 Generic