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QRP-02 - The first SMD Gainclone amplifier in the world(?)
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The world's first DIY SMD Gainclone
Specifications for the new advanced Gainclone.
- 50 um pcb with groundplane
- Fast recovery rectifier diodes, TO247 and option for TO220
- High performance 4700 uF/50V max, 10 mm snap-in and regular ones too.
- LM3886, inverting, 1k+18k, properly decoupled
- Mute
- Output filter, 14 turns, diam 8 mm, 1.5 mm wire, 5 mohms, 0.7 uH (I can get those inductors free of charge)
- Zobel network
- DC-servo, AD8620, properly decoupled (possible not to use it)
- Input buffer, non-inverting, 220 kohms input impedance, AD8620, properly decoupled.
- LM317/337 in SOT223
- All elctrolytic caps hole mounted
- SMD caps PPS, X7R, NPO types, 0805, 1206, 2220 size
- SMD resistors, 0805
- Lug connectors with option for 2.5 mm2 wires
- Fuses 5 x 20 mm