For Sale, TenTec Model 411 CENTAUR HF Linear Amplifier. 600 Watts out, 160-10meters. Uses 3 Svetlana 811A Tubes. 120 or 240 VAC. New from the factory in 1997 for $749 plus shipping. Used very little. Would like to sell in the Northern Virginia Area. Asking $475. Kent Hufford KQ4KK 703-494-303 khufford at comcast.net