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 270 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.
Includes a transmit-receive relay control for simple operation with a transceiver, and has a wide range Pi Output circuit that matches 52 or 75 ohm coax cable or variety of other load impedances.
– Power Rating
1200 Watts PEP Input in SSB Mode. 800 Watts DC Input on CW.
– Frequency Range
3,000–4,500 kc
6,000–9,000 kc
11,000–16,000 kc
16,000–23,000 kc
23,000–35,000 kc
– Drive Requirement
100–125 Watts
– Meter: Reads Relative Output and Cathode Current.
– Power Supply: Computer grade electrolytic capacitors, 55 mfd filtering at 1200 VDC rating. Silicon Rectifiers.
Tube Lineup
– (4) 6LQ6
Power Requirements
117 VAC, 50-60 Hz, 400 watts average input with voice modulation.
230 VAC, 50-60 Hz model available on special order.
