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The Aleph X amplifier is a do-it-yourself amplifier designed by "Grey." Generally, its intended to be an improvement to the classic Pass Labs Aleph 3 amplifier. It adds differential circuitry and supersymmetry concepts (also pioneered by Pass Labs).
One useful link I found was Eric's web site- "Eric's" High Power Aleph X.
There is a lot of information at this site. You might want to look it over if you are building an Aleph X.
Key parameters of my version are as follows.
|Power Supply||Dual mono CRC= 60,000 uF, 0.20 ohms (25W metal clad), 60,000 uF||Power transformers||Two Victoria Magnetics 18V CT/ 700 VA Toroids||Bridge Rectifiers||IXYS 400V, 50 amp modules, fast recovery||Power supply snubbers||510 ohms in series with .01uF Wima MKT||Power supply bleed resistors||5K (1/2W) across the terminals of each Electrolytic to discharge caps when turned off||Voltage after CRC/ripple||22 VDC/ ??mV ripple||Softstart method||CL-60 thermisters in-line with each transformer primary, bypassed after 3 seconds||Output devices||12 each of IRFP0244 per channel, matched|
For the design phase I did a number of simulations and calculations, using the Duncan Amp PSU simulation and the Aleph X Spreadsheet (see link in "reference materials," above).
A lot of people wonder how to connect multiple output transistors to this board to make a higher power version of the amplifier. The board only has room for 4 power MOSFETs.
Here are some options to add transistors, in my example there are 12 rather than the original 4 power MOSFETs.
The schematic is only of half of the board, the other half is symmetrical (the same) so its easily duplicated for those components. I used "Option 3" because it was easy to but screw-headers in the spots where the transistors originally went, and to connect the power supply directly to the output boards.
Construction of the Amp- Parts Issues
Putting pieces together
More assembly details
I decided to sell the completed PC boards to another DIYer who wanted to build this project, but I kept the large amplifier case and used it for my Extrema amplifier project.