Heathkit IG-72, Audio GeneratorCondition:* Used, Tested For Output. Unable To Test Further.* Sold As-Is. As Pictured.Additional Notes:* Frequency: 10 cps to 100 kc. Switch Selected – 5% Accuracy 2 Significant Figures & Multiplier* Output Ranges: 0 – 10V, 0 – 3V Into Hi-Z (10K Min.) 0 – 1V, 0 – 0.3V, 0 – 0.1V, 0 – 0.03V, 0 – 0.01V And 0 – 0.003V Into 600 * Load: Internal 600 : 0 – 1V And Below. (Switch Selected)* Meter: 4-1/2 200 uA. Three Scales: 0 – 10V, 0 – 3V, -12dBm – +2dBm* Distortion: Less Than 0.1% 20-20,000 cps* Tubes: 1 – 6AU6, Oscillator 1 – 6CL6, Cathode Follower 1 – 6X4, Rectifier* Power: 105-125 Volt AC, 50-60 Hz, 40 Watts.* Dimensions: 9-1/2 (W) x 6-1/2 (H) x 5 (D)Heathkit IG-72