Aleph 30 (Volksamp) amplifier page - Updated!
Main Content Date
Two stage, single-ended Class A amplifier, 2x30W, designed by Nelson
Pass.
I designed the PCB layout, based on original component placement. I tried
to be as close to the original design, as possible.
Construction details:
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Left Right |
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Left Right |
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Left
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Chassis construction |
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Heatsinks after the eloxing |
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PCB assembly to the heatsink |
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Chassis assembly |
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Power supply board |
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PS board almost finished |
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The whole PCB was designed based on Nelson's original layout (can be found in the service manual). The PCB was made in a professional PWB factory. PCB properties are 70um Cu, on both sides, double sided FR4 boards. Heatsinks are made in Hungary, by Alcoa Corp. in Székesfehérvár.
Components:
- Holco audiophile resistors (1/4 and 1/2W)
- Panasonic 3W resistors
- Matched FET tarnsistors (IRFP 240)
- Panasonic FC capacitors
- Silver Mica capacitors
- 2x70um Cu FR4 PCB
- Kimber hook-up wires
- Neutrik XLR connectors
- Wampire binding posts
PSU components:
- Nippon Chemicon 68000uF/50V capacitors
- Wima capacitors
- OnSemi MUR series diodes
- 2x70um Cu FR4 PCB
- Gold plated EIC connector
All the things here only for DIY. Not for commercial use!
