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#1 |
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diyAudio Member
Join Date: Dec 2002
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amp is stereo and is built per Nelson pass schematic. All The components
are screwed onto one of the heatsink. A exact 2nd heatsink is screwed onto the first one in such a way that the top part of the Dale 50W resistor (the yellow bar seen in the picture) is touching the 2nd heat sink. The 2nd heatsink therefore takes almost 1/2 the heat away, leaving 1/2 to the 1st heatsink. All the input /output wires are ready to be hooked up. All you need to do is add speaker output binding posts and RCA input jack and soldered the wires to them and the amp will be ready. The piece of plywood is there for you to mount your speakers binding post and RCA jacks. the terminal strips allow you to hook the amp to external DC source. I am asking $90 for the amp. The 2 heatsinks alone are worth $75. Shipping is additional, the amp is heavy , about 20 lbs. I also built a power supply for it, see attached picture. It uses 2 torroid, one for each channel. Each toroid is rated at 225VA. 18-0-18V which after rectification and filtration comes out to about 26-0-26V. There are 8 caps, each cap is 15,000 UF. Nelson Pass SOZ design spec has table that specfies amp output wattage based on supply voltage, and if I remember correctly, this one is designed to put out 10-15 Watts per channel. The power supply uses heavy duty aircore inductor (red collor round shape in picture) for pi filtering as suggested in SOZ design spec. I am also asking $90 for the power supply. It is also heavy aboug 20 lbs and shipping is additional. |
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#2 |
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diyAudio Member
Join Date: Dec 2002
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Here another shot.
THe amp size is about 17 X 7 X 7 When in full operation, the heatsink are warm to touch, but not unbearable because I can leave my hands on the heatsinks for a long time. |
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#3 |
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diyAudio Member
Join Date: Dec 2002
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another shot
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#4 |
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diyAudio Member
Join Date: Dec 2002
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another shot , straight on, you can see the 2 heat sink
pressed together with the resistor and mosfet in between |
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#5 |
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diyAudio Member
Join Date: Dec 2002
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power supplyl
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#6 |
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diyAudio Member
Join Date: Dec 2002
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psu closed up
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#7 |
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diyAudio Member
Join Date: Dec 2002
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front view of psu
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