Note
QST, Nov 1969, p. 111. (specs)
QST, Nov 1970, inside front cover.
QST, Apr 1973, p. 116.
Swan built the 1200W amplifier as a companion piece for their Cygnet 270B transceiver. It used four 6LQ6s in grounded-grid and had a built-in AC supply. The amp was rated at 1200 watts PEP SSB/800 watts CW.