5W Driver Amp

27 NOV 2017 - The Rev B Driver amp has been retired and is no longer available. All of the technical information has be archived to the zip file that you can download at the bottom of the page.

Here is the technical information for the Rev C, 5W driver amp.

Why the funny shape and great expanse of unused PCB? (I hear you ask)
We wanted it to fit the holes in the bottom of the case that support the ATU so the driver can be installed with no drilling of the enclosure.

The assembly manual at the bottom of this page, has instructions for building the amp and installing the amp in a Hardrock-50 amplifier. 

Building a Stand-Alone 5W amp

This amp is great for adding some power to any QRP project. The gain is about 10 dB and can be increased to as much as 20 dB by changing resistor values on the board. If you cut off the unused portion of the PCB, the amp is one of the smallest 5W amps available.

Remember this amp requires an external low-pass filter to remove harmonics from the output signal. Never connect the DRV_OUT directly to an antenna.

5W driver amp schematic:

Driver Rev B Info.zip
Nov 27, 2017, 5:50 AM
Dec 5, 2017, 5:42 PM