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Pass Aleph 3 clone. 30W Class A Amplifier. XP Power AC/DC Switcher. Douk Audio Chassis.

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In this video, I start the electro-mechanical design of the amplifier. The Aleph 3 is a 30W Class A amplifier sold approximately 25 years ago (1997). Modified the current source to achieve higher power.
Purchased Items:
Aleph 3 clone: eBay for approximately $45 for the pair.
Power Supply: XP Power LCS150US24 at Digikey for $24.
Small heatsink at Amazon for $20.
Large heatsink at Digikey for $28.
Questions? Let me know.

Опубликовано:

22 авг 2024

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Комментарии : 12

@timefakeepoch617 Год назад

Thanks very much, looking for your 3rd video of Pass Aleph3 build.

@DanPattenAudioG33k Год назад

Your welcome. I am waiting for new chassis parts to arrive and currently working with heatsinks.

@caraqal Год назад

Thank you for a a great video, thinking of building a Pass design myself, for now just trying to get ideas from smarter folks! Regarding the fan, you could try looking for a fatter PC cooling fan, something around 25mm thick, specifically designed for higher static pressure. A company called Noctua has some great options. Using two fans for a push-pull design could also be good. Perhaps also leaving a gap between the heatsinks and sealing the gap with aluminum tape to create a "duct" could also help not overload the fan and keep the air moving, but in this case I'm not sure if that flow would be enough to disturb the boundary layer enough. Best of luck! I love the hidden heatsink idea and am curious how it will turn out!

@DanPattenAudioG33k Год назад

Your welcome. Your ideas are good and have been looking adding a space between the heatsinks. Will also look at other fans that can deal with higher pressure. I'll take a look at Noctura. Thanks.

@Scott-mp5kr Год назад

Great video and instruction!

@DanPattenAudioG33k Год назад

Thanks.

@crazy_istanbul_cat Год назад

I have both Aleph J and Aleph 3 pcbs and i heard that Aleph J is better sounding.But i have 4 ohm speakers so i want to try Aleph 3.

@DanPattenAudioG33k Год назад

Have not heard or read about differences between the two. I am still working through some ideas for the next video. Hopefully done in another couple of weeks. Thanks for watching :)

@indyayoutube9616 Год назад

Thanks for the video Dan, very informative. Question, how do you plan to power both channels with the two SMPS units, i assume you will be pairing them up to create the +24/GND/-24 then power each channel in parrellel?

@DanPattenAudioG33k Год назад

Correct. Since each power supply's output is isolated, they can be connected in series to form +/-24V. These units have enough capability to power both channels in parallel.

@craigenputtock Год назад

Do you think it's cheaper just to buy an assembled amp with these modules?

@DanPattenAudioG33k Год назад

Might be cheaper to buy an assembled unit. Have you found an assembled amp with these modules? I would be interested in looking at it. Do you have a link?