A 45W amplifier for 23cm

摘要

For many years I operated on 23cm with just 2 watts RF output but never experienced the aircraft scatter and consistent over-the-horizon contacts that I knew the band could support. Increasing the power by 13dB or so opened up the band in ways I didn't think possible. This articlerndescribes a 45W Class AB Power amplifier covering the 1.3GHz band that requires only a few watts of drive for full output. It is a modern, safe replacement for a single 2C39A valve amplifier and does not require a hazardous high voltage power supply. It is ideal for use with a DB6NT or similar transverter, a Kenwood TS2000X or similar transceiver, reaching a power levelrnwhere the 1.3GHz band becomes interesting.