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STEREO_HEADPHONE_AMPLIFIER

2017-01-02 23:42  
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STEREO_HEADPHONE_AMPLIFIER
Will drive dyanamic headphones of 75 to 400 ohms impedance to power level of 60 mw. Program source may be tuner or ceramic car tridge. Frequency response is fiat within 0.33 db from 20 cps to 20 kc. High input impedance, 1 meg up to 2.5 kc and decreasing to 400K at 15 kc, is obtained by using bootstrapped bias network for Q1 along with negative feedback.- Transistor Manual, Seventh Edition, General Electric Co., 1964, p 272.