Figure 10.2 Frequency response of triode and pentode amplifiers. The figure shows two frequency response plots on the same graph for comparison. These are the classic dB versus frequency that everyone is familiar with. The triode amplifier has a mid band gain of 37.8 dB. The response is down 1 dB at about 1.5 Hz on the low end and 210 kHz on the high. The low end minus 3 dB point is off the graph. The high end minus 3 dB point is 450 kHz. The pentode amplifier has a midband gain of 50.3 dB. The minus 1 dB points are at about 6.8 Hz on the low end and 55 kHz on the high. The minus 3 dB points are at about 2.8 Hz on the low end and 100 kHz on the high end. End verbal description.
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