125B · 1 knob
Diplomat
Based on the Matchless DC30
- Category
- Preamp / Amp-in-a-box
- Controls
- Volume
- Price
- $18.00in stock
From the vendor
Diplomat is based on the EF86 channel of a classic boutique British-style amp, which is a single-stage pentode preamp. By itself it will only ever run clean, but you can use it as a clean boost to push a pedal/preamp/amp, or you can push it into overdrive with another pedal.
Schematic
The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 39 rows
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ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 12 | ||||
| ×1 | 560R | 560 | 1/4W Resistor | shopping list |
| ×2 | 1k | 1k | 1/4W Resistor | shopping list |
| ×2 | 2k2 | 2.2k | 1/4W Resistor | shopping list |
| ×1 | 4k7 | 4.7k | 1/4W Resistor | shopping list |
| ×1 | 10k | 10k | 1/4W Resistor | shopping list |
| ×1 | 68k | 68k | 1/4W Resistor | shopping list |
| ×1 | 220k | 220k | 1/4W Resistor | shopping list |
| ×1 | 330k | 330k | 1/4W Resistor | shopping list |
| ×1 | 470k | 470k | 1/4W Resistor | shopping list |
| ×1 | 1M | 1M | 1/4W Resistor | shopping list |
| ×1 | 2M2 | 2.2M | 1/4W Resistor | shopping list |
| ×7 | 5M1 | 5.1M | 1/4W Resistor | shopping list |
| Capacitors 17 | ||||
| ×1 | 100p | 100p | Ceramic capacitor | shopping list; 50V |
| ×1 | 180p | 180p | Ceramic capacitor | shopping list; 50V |
| ×1 | 390p | 390p | Silver mica capacitor | shopping list; 500V |
| ×1 | 680p | 680p | Silver mica capacitor | shopping list; 500V |
| ×1 | 1n | 1n | High voltage film capacitor | shopping list; 630V |
| ×1 | 1n5 | 1.5n | Film capacitor | shopping list; 50V |
| ×1 | 2n2 | 2.2n | High voltage film capacitor | shopping list; 630V |
| ×1 | 4n7 | 4.7n | High voltage film capacitor | shopping list; 630V |
| ×1 | 10n | 10n | High voltage film capacitor | shopping list; 630V |
| ×1 | 22n | 22n | High voltage film capacitor | shopping list; 630V |
| ×1 | 47n | 47n | High voltage film capacitor | shopping list; 630V |
| ×1 | 100n | 100n | High voltage film capacitor | shopping list; 630V |
| ×1 | 100n | 100n | Film capacitor | shopping list; 50V |
| ×1 | 220n | 220n | Film capacitor | shopping list; 50V |
| ×1 | 10uF | 10u | Electrolytic capacitor | shopping list; 250V |
| ×1 | 22uF | 22u | Electrolytic capacitor | shopping list; 16V |
| ×1 | 100uF | 100u | Electrolytic capacitor | shopping list; 25V |
| Diodes 2 | ||||
| ×1 | UF4007 | UF4007 | Ultra-fast rectifier diode | shopping list |
| ×1 | 1N5817 | 1N5817 | Schottky diode | shopping list |
| Transistors 2 | ||||
| ×1 | 2N3904 | 2N3904 | NPN General Purpose Amplifier | shopping list |
| ×1 | IRF740 | IRF740 | 400V 20A N-Channel MOSFET | shopping list |
| ICs 2 | ||||
| ×1 | NE555 | NE555 | Timer IC | shopping list |
| ×1 | L7806 | L7806 | 6V regulator | shopping list |
| Inductors 1 | ||||
| ×1 | 100uH | 100uH | 100uH 2A Inductor | shopping list |
| Potentiometers 1 | ||||
| Volume | A1Msch | A1M | Potentiometer | |
| Switches 1 | ||||
| ×1 | SP8T | SP8T | Miniature Rotary Switch | shopping list |
| Other 1 | ||||
| ×1 | EF86 | EF86 | Pentode (eBay has best deals, look for EF86, 6267, or | shopping list |