Figure 858 : 1 IC Tone Control Preamplifier

Figure 872 : 2 Transistor Preamplifier

Figure 987 : Low-Voltage Microphone Preamplifier

Figure 457 : MIC Mixer Preamplifier 3-Input

Figure 998 : Mono 1 Transistor Preamplifier

Figure 999 : Mono 15V Preamplifier

Figure 1000 : Mono Preamplifier

Figure 1028 : Preamplifier

Figure 1027 : Preamplifier

Figure 1068 : Preamplifier Stereo

Figure 421 : Stereo Riaa Preamplifier

Figure 18 : Universal Preamplifier - Mono

Figure 84 : Universal Preamplifier Stereo