New Aleph 4 - heatsinks anyone?

apassgear · 4th December 2002, 03:09 AM

New finished Alehp 4

Many thanks to Zenmaster Nelson for his support and use of his intelectual property. Also to Mark Finnis for the posted information related to this project that helped to accomplish my goal.

apassgear · 4th December 2002, 03:14 AM

Top

apassgear · 4th December 2002, 03:17 AM

Back panel

fcel · 4th December 2002, 03:54 AM

Looks great! Did you made the heatsink yourself?

grataku · 4th December 2002, 05:30 AM

Nice,
are you going to put on some type of tops and downs or are you just going to leave it open? How hot does it get down there in the summer?

jleaman · 4th December 2002, 06:18 AM

that looks like a big beast. But looks nice too. why do you have 3 black binding postes per channel ? does it get realy hot. ?

1/137 · 4th December 2002, 11:50 AM

Beautiful!

What are the details of the power supply?

thanx
rt

apassgear · 4th December 2002, 05:04 PM

fcel

The heatsinks are cast alu. I made the design an had a modelist make a wood pattern, then a local supplier casted the parts.

Then the inner surface and surounding edges were milled.

Dimensions are L 21" W 10" H 2 5/8. The core is somthing less than 5/8", so fins are 2" spaced at 1 1/8"

These parts have the outer surface as casted, only a little cleaning at the foundry.

I have ordered 4 more pieces for future Aleph X. These will be shot blasted on the fin area and then machined.

apassgear · 4th December 2002, 05:29 PM

grataku,

Yes, I will have upper and lower lids, these will be spaced around 3/8 from the heatsink border. I have to find a place that will cut the needed dimensions of alu sheets.

It gets quite hot here in summer up to about 35/37° C inside houses whithout A/C.

I did add a thermal protection (75° C) but i dont think I'll have problems, since the heat sinks goes up about 27° over ambient at the hottest point behind the FET. So I figured that will have about 62/64° in a hot summer day. The power FET are spaced at 1 1/8" over the heatsink.

apassgear · 4th December 2002, 05:39 PM

JasonL

Ya, I knew that those binding post would call attention.

I used what I had at hand. Both upper should be red. I added two pairs because I like to biwire the speakers. The posts are wired individualy up to the star ground and up to the Source/Drain connection at the front end PCB.

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4th December 2002, 03:54 AM	#4
fcel diyAudio Member Join Date: Sep 2001 Location: LA County	Looks great! Did you made the heatsink yourself?

4th December 2002, 05:30 AM	#5
grataku diyAudio Member Join Date: Dec 2000 Location: -	Nice, are you going to put on some type of tops and downs or are you just going to leave it open? How hot does it get down there in the summer?

4th December 2002, 06:18 AM	#6
jleaman Banned Join Date: Apr 2002	that looks like a big beast. But looks nice too. why do you have 3 black binding postes per channel ? does it get realy hot. ?

4th December 2002, 11:50 AM	#7
1/137 diyAudio Member Join Date: May 2002 Location: albuquerque nm	Beautiful! What are the details of the power supply? thanx rt

4th December 2002, 05:04 PM	#8
apassgear diyAudio Member Join Date: Nov 2002 Location: Viña del Mar, Torreon	fcel The heatsinks are cast alu. I made the design an had a modelist make a wood pattern, then a local supplier casted the parts. Then the inner surface and surounding edges were milled. Dimensions are L 21" W 10" H 2 5/8. The core is somthing less than 5/8", so fins are 2" spaced at 1 1/8" These parts have the outer surface as casted, only a little cleaning at the foundry. I have ordered 4 more pieces for future Aleph X. These will be shot blasted on the fin area and then machined.

4th December 2002, 05:29 PM	#9
apassgear diyAudio Member Join Date: Nov 2002 Location: Viña del Mar, Torreon	grataku, Yes, I will have upper and lower lids, these will be spaced around 3/8 from the heatsink border. I have to find a place that will cut the needed dimensions of alu sheets. It gets quite hot here in summer up to about 35/37° C inside houses whithout A/C. I did add a thermal protection (75° C) but i dont think I'll have problems, since the heat sinks goes up about 27° over ambient at the hottest point behind the FET. So I figured that will have about 62/64° in a hot summer day. The power FET are spaced at 1 1/8" over the heatsink.

4th December 2002, 05:39 PM	#10
apassgear diyAudio Member Join Date: Nov 2002 Location: Viña del Mar, Torreon	JasonL Ya, I knew that those binding post would call attention. I used what I had at hand. Both upper should be red. I added two pairs because I like to biwire the speakers. The posts are wired individualy up to the star ground and up to the Source/Drain connection at the front end PCB.

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