The console amplifier has line and headphone output, switch for bias and permits equalization for 15aquot; and 7Viaquot; tape speeds. ... 0.1 microvolt to 0.2 volt at the terminals of the output cable; Output Impedance at front panel jack it 53 ohms resistive. ... regueit Impedance Nomograph (Continued from page 15) decade of scale C must be used to locate 15; Figure 3(g). ... Problem Variation The foregoing problem can be altered to involve a resistor which might be in parallel with 2 to give 1.6.