Enclosure not stated · 1 knob
High Quality Transistor Preamp
- Category
- Preamp / Amp-in-a-box· Amplifiers and VCAs
- Controls
- Gain
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- see vendor
- Tags
- Amplifiers and VCAs
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 19 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×1 | 180k | 180k | read from the schematic by eye | |
| ×1 | 22k | 22k | read from the schematic by eye | |
| ×1 | 100k | 100k | read from the schematic by eye | |
| ×1 | 47 | 47 | read from the schematic by eye | |
| ×1 | 18k | 18k | read from the schematic by eye | |
| ×1 | 33k | 33k | read from the schematic by eye | |
| ×2 | 6.8k | 6.8k | read from the schematic by eye | |
| ×1 | 220 | 220 | read from the schematic by eye | |
| ×1 | 68 | 68 | read from the schematic by eye | |
| Capacitors 6 | ||||
| ×2 | 10uF | 10u | input and output coupling; read from the schematic by eye | |
| ×1 | 3.3uF | 3.3u | read from the schematic by eye | |
| ×1 | 1.5nF | 1.5n | read from the schematic by eye | |
| ×1 | 125uF | 125u | read from the schematic by eye | |
| ×1 | 50uF | 50u | read from the schematic by eye | |
| ×1 | 22pF | 22p | read from the schematic by eye | |
| Transistors 3 | ||||
| ×1 | BC178B | BC178B | PNP input stage; read from the schematic by eye | |
| ×1 | BC108B | BC108B | NPN emitter follower; read from the schematic by eye | |
| ×1 | BC109C | BC109C | NPN gain stage; read from the schematic by eye | |
| Potentiometers 1 | ||||
| Gain | 100k | 100k | Potentiometer | read from the schematic by eye |