5W Driver Amp Circuit Board 3 dB with calibration

3 dB with calibration

5 dB in the RX path and increased input VSWR

If you intend to use thedriveramp as a stand-alone 5W amplifier and connect its output to an antenna

Look for an upcoming 'hack' to add CIV output to deliver band change info to a QRO amplifier and the Hardrock-50 simultaneously

63” X 2”

5W Driver Amp Circuit Board 3 dB with calibrationHere is a 5W output 1 55 MHz amplifier for stand alone QRP operation or to drive the 100W MRF101 or 500W AN1819 amplifiers to full power with lower drive level. The amp can be built with only the output stage for a drive of 100 200 mW or add an MMIC to lower the drive to the 1 2 mW range. The circuit uses a NXP AFT09MS015N with a 4: 1 output transformer which can develop over 7W with 13. 8V DC input. The gain is about 20 dB with the output stage alone