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Old 28th April 2007, 10:07 PM   #1
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Default "ST151" 100W amplifier

Hi folks,

So here it is. With photos and full documentation.
My amplifier design, called "ST151", that uses cheap and easly available, industrial standard parts.
I gladly suggest to build it for anyone.

(Please don't flame the thread with any audiophile modificaton. ST151 is not a state-of-art design, uses nothing new or special circuit. But it's designed properly > good sound quailty, cheap parts, stability.)


[First attachment: parts list, performance, etc.]
Attached Files
File Type: pdf st151_txt.pdf (4.3 KB, 3129 views)
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Old 28th April 2007, 10:10 PM   #2
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[Second attachment: pcb]
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File Type: pdf st151_pcb.pdf (20.7 KB, 1895 views)
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Old 28th April 2007, 10:11 PM   #3
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[Third attachment: schematic]
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File Type: pdf st151_sch.pdf (81.4 KB, 3163 views)
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Old 28th April 2007, 10:13 PM   #4
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[Fourth attachment: parts placing on PCB]
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File Type: pdf st151_plc.pdf (37.0 KB, 1269 views)
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Old 28th April 2007, 10:14 PM   #5
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[Fifth attachment: photo 1]
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File Type: jpg st151_1.jpg (34.6 KB, 5396 views)
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Old 28th April 2007, 10:15 PM   #6
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[Sixth attachment: photo 2]
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File Type: jpg st151_2.jpg (28.8 KB, 5160 views)
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Old 28th April 2007, 10:16 PM   #7
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[Seventh attachment: photo 3]
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File Type: jpg st151_3.jpg (34.7 KB, 5570 views)
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Old 29th April 2007, 02:43 PM   #8
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Any comments?!
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Old 29th April 2007, 02:48 PM   #9
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Isn't C13 too big?
Have you tried ~47n?
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Old 29th April 2007, 04:05 PM   #10
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So, as an estimate, whats the cost for stereo amp using this circuit minus the heatsinks and case? I'm not very knowledgable in the design of amplifiers but i can build and work on them. I've been keeping my eye out for something i could use for the upper half of my semi-active 3 ways and this looks like it could work...
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