Here is the list of my audio gears (mostly DIY)
Zen amp
- This is the first amplifier in "Zen" series by Nelson Pass.
- It is a 10-watt, single-stage, single-endded, class-A amplifier.
- It was built while I was studying in USA.
- Notice the heatsink is made of aluminium cut in pieces and connectted them together with bolts. A real heatsink was too expensive. Also it needs a fan cooling.
- I sold my Audio Innovations transistor integrated amplifier after I built this amp. Because the Zen sounds better.
Mini Aleph 3 -- still unboxed
- A modified version of the well-known PassLabs' Aleph 3 Single-endded 30 W/ch power amplifier
- I found its schematics from www.diyaudio.com . Sorry, I fogot the designer's name.
- This amp sounds great and is currently my everyday-used amp.
- I run it at +-15V DC supply which if very high distortion when driving output beyound +-10V. I plan to increase its supply voltage a little bit.
Pass A75 -- Class A Monoblocks
- This amp was designed by Norm Thargard and Nelson Pass. It was a project published in the Audio Amature Magazine around the year 1995.
- The first picture it my prototype version. I used 4 pairs of IRFP240+IRFP9240 per channel.
- However the final version of these monoblocks use 12 pairs of IRF520+IRF9520 per channel.
Gain Clone -- LM3875
Gain Clone -- TDA 2050
Gain Clone -- LM3876
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No photos
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Proac Tablette III Speakers
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I bought them while I was studying in USA, in 1995.
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I mail ordered them from somewhere in Califonia.
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I paid $550.
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Look at its tweeter, the foam is decaying.
Zen Preamp
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I built it for my Zen amp.
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It was also designed by Nelson Pass
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Never been boxed!
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Recently, I upgraded the regular VR to a series step attenuator.
Magnet PV-01
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It is a tube preamp with MM phono stage
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Developped by Magnet Technologies, a Thai company.
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I bough the PCB and wires
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I put it in a Magnet MA-200 Power Amp box.
Turn Table
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It is also a home-brew.
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The body is made MDF boards. Two boards were glued together, to increase mass and thickness.
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The platter is belt-driven by a small DC motor.
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The stylus is a Grado.
My Prototype Electrostatic Loudspeaker
- I made it as a 1'x1' prototype and it worked!
- My plan is to build a larger ones
- High voltage power supply and step-up transformer are not shown
