Just another Aleph 5

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icceman

icceman

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Joined 2002
#1
Pics of my Aleph 5 (unfinished)

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An externally hosted image should be here but it was not working when we last tested it.

The heatsinks

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An externally hosted image should be here but it was not working when we last tested it.

The PSU

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Casing layout
 
#2
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The "PSU module"

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Step relay for push button switch

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AC filter using Class X (2uF) and Class Y (4700pF) caps

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An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

The "PSU module" in the main chassis

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Fan filter
 
#3
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Front view

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Top View

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Back View. Mouse pads are used to reduce the vibration noise from the fans.

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Fan speed controller

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The Aleph 5 against a CD
 
#8
Absolutely beautiful work!!!! You should be very proud!!!

Stunning!!!

What value are the bypass caps that you used in the power supply? Are they made by Solen?

Also, who makes the chokes that you used?

Thank you.....

Best Regards,
 
#12
EXCELLENT work !! - everything extremely well thought out IMO.
(but as Duck-Twacy I also have some doubts about using this handles)

I hope You don`t mind some suggestions for the wooden faceplate (nice idea BTW):

I think less is more and I would continue as with the rest of Your design: clean and simple lines.
Therefore if I were You I would try to mount the faceplate in a way that those 4 screw-heads are not visible from the front (I believe it will look better).
And when You`re at it, omit the things on the left and right of the face (apparently this is kind of reinforcement for the handles which I would omit too or maybe mount them on the rear).

And what about another kind of wood and other colours for the face?
Maybe a brighter wood?
Also IMHO this would go better with black metal (anodised aluminium) instead of the goldish things and would fit more to the simplicity and elegance of the rest of Your design (and with the black body of Your case).
Maybe something similar to this style?:
 

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#14
kristijan-k said:
Hello,

I agree with the Paul, excellent work.
I like the way you used for active cooling.

Will you use those handles for moving the amplifier or
they are just for look ?
Are they strong enough ?

I used similar ones of alumimium on one of my amplifier and one
handle cracked at the place where the screw go !
I almost hurt my leg.

Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design
Click to expand...
The handles are from Colombo Design http://www.colombodesign.it/italian...?idarticolo=1&cartella=maniglioni&cat=1&ing=1
I'm not sure if they're strong enough:scratch:, but they're made of cromall alloys (using M6 bolt) and are quite heavy (according to the website). Anyway, I won't be using it for moving the amp (it's over 40Kg and I won't want to move it much). :dead:
 
#15
Apogee said:
Absolutely beautiful work!!!! You should be very proud!!!

Stunning!!!

What value are the bypass caps that you used in the power supply? Are they made by Solen?

Also, who makes the chokes that you used?

Thank you.....

Best Regards,
Click to expand...
The PS filter caps are Nichicon Gold tune (300,000uF) and the bypass caps are Solen (4uF).
The chokes are JANTZEN Baked Wire Coil Inductors (16.5 gauge, 0.63ohm).
 
#16
This project definitely earns the "Not Just Another" title.😉

Very impressive.

I also have my reservations regarding the handles, I would think they should have been more massive. The styling of the amp reminds of Gryphon. As to the fans, they work better when they suck the air out instead of blowing in.
 
#17
anelar said:
I like it, I really like it. Maybe because I'm aiming for forced cooling myself. A complete posting at passdiy.com I hope?

//Anders from Sweden
Click to expand...
The heatsinks are rated at around 0.2C/W, but because of the design (horizontal fins), I've to use force cooling to circulate the air around the fins. But with force cooling, the rating of the sinks drop to around 0.01C/W.
 
#18
fcel said:
icceman,

No offense but shouldn't the fan be blowing air into the heatsink and not away from the heatsink?

BTW, your amp looks great!
Click to expand...
The fans help to remove hot air molecules around the fins. IMHO, it'll be more efficient to have the fans drawing out the air as it'll force the air to pass through the whole heatsinks (the air can only enter from the front). I also wouldn't want to blow the hot air onto the woooden faceplate (the wood may warp).
 
#19
cocolino said:
EXCELLENT work !! - everything extremely well thought out IMO.
(but as Duck-Twacy I also have some doubts about using this handles)

I hope You don`t mind some suggestions for the wooden faceplate (nice idea BTW):

I think less is more and I would continue as with the rest of Your design: clean and simple lines.
Therefore if I were You I would try to mount the faceplate in a way that those 4 screw-heads are not visible from the front (I believe it will look better).
And when You`re at it, omit the things on the left and right of the face (apparently this is kind of reinforcement for the handles which I would omit too or maybe mount them on the rear).

And what about another kind of wood and other colours for the face?
Maybe a brighter wood?
Also IMHO this would go better with black metal (anodised aluminium) instead of the goldish things and would fit more to the simplicity and elegance of the rest of Your design (and with the black body of Your case).
Maybe something similar to this style?:
Click to expand...
I'll be using countersunk bolts to mount the faceplate and screw caps that are of similiar colour to the wood(those that are used for furniture) to conceal the bolts.
The two things that are on the left and right are actually the handles (if u look from the front).
I'm thinking of using rosewood (dark red) for the faceplate. I've tried black handles and I think the faceplate looks better with gold one.
 
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