The ALPHA 78 is a self-contained, high frequency linear power amplifier capable of continuous operation at input powers in excess of two kilowatts PEP/SSB and one kilowatt average or continuous carrier, with no time limit. It is manually tunable from 1.8-2.0 plus 3-22 MHz, optimized for convenience in the 160 through 15 meter amateur bands (export models also cover 10 meters). Four additional bandswitch positions provide NO-TUNE-UP operation at full legal power on the 80 through 15 meter amateur bands. The ALPHA 78 is capable of high speed break-in CW (QSK) when used with a transmitter or transceiver of suitable break-in capability. The ALPHA 78 also incorporates a feature permitting optimization of efficiency in either the CW or "phone" subband when using the NO-TUNE-UP feature on 80/75 through 15 meter amateur bands.