The link below is to a site I browse periodically.
It has a few interesting projects to ponder. Even if construction information may require searching out elsewhere.
With the modern ethic of 'recycling or repurposing Junk', and all the recent coverage of Solid State Power Amps. The article seems topical.
If anybody can get the images put up on here, the thread will be all the better for it .
www.homebuilthifi.com
Click on Amps, Aksa Lendar 55 Watt Big Boy Monoblocks.
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Item:AKSA LENDER
Type:Alpha Big Boy 55w mono blocks
Posted:23 July 2018
Builder:ESJ
Country:Finland
Comments:0
Covenant
"Are those computers?"
"No."
"Servers?"
"Nope."
Instead these two mono block amplifiers are somewhat experimental build with active cooling, using 2 pcs each = 4 pcs total of Dell server CPU coolers and each of them contains one Noctua 140mm fan, so 4 Noctuas also for stereo pair. Power output is about 55w@8ohm which is very good result with pure class-A amplifier. Heat dissipation is something like +200w per amp, over 400watts total.
They sounds really powerful, you couldn't believe there's "only" 55 watts of power!
I made variation with black and aluminium sides, prefer black maybe. Top cover is 6mm slightly tinted glass.
Each mono block contains;
- 545va 2x30sec trafo's, making almost 40vdc rails.
- Inrush current limiter.
- Kemet 15 000uF 63v caps, making 150 000uF per channel.
- SMPS for fans, they run at 12vdc and are quiet enough.
- 2x noctua 140mm fans.
Thanks DIYA, Akkeli for metal work and everyone else involved
- Esa Juntunen
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