Heathkit KL-1 Chippewa Kilowatt Linear Amplifier Frequency range: 80, 40, 20, 15 and 10 meters, in SSB, CW or AM linear operation Tubes: 2 - 400A forced air cooled with centrifugal blower 1 - 6DQ6 2 - 0C3 4 - 0D3 2 - 866A Grid neutralized, continuous plate current monitoring, extensive TVI shielding Features both tuned and swamped grid circuits to accommodate all popular exciters Operates class AB1 for SSB and AM linear service and high efficiency class C for CW service Panel controls: power switch tune-operate switch HV on/off switch final bandswitch meter switch grid bandswitch grid tuning mode switch plate tuning plate loading and bias adjust Two meters provided: final plate current switch selected readings of final grid current, screen current, and plate voltages