Aleph 2 Heat Sink (chassis)

[cowanrg]

I think R theta would be fine ,they have big big sinks

yeah, but r-theta isnt the cheapest out there...

 

[Coulomb]

The heat sink in question posted a few notes back is definitely a Wakefield off the shelf part. The Wakefield part # 392-180AB or Digikey part # 345-1046-ND is very expensive here in North America. I have included a link to the PDF below. It is Fig. 14

Hope this helps.

http://info.digikey.com/T023/V5/0429.pdf

Anthony

 

[diyman]

Heatsinks

CH2,

I suggest you look up Suntronics on the 3rd floor of Sim Lim Tower. They stock a wide of Semikron heatsinks and I came across one Model : P180(if I remember correctly!) which is 0.3deg/w per pair at about S$30/- each with a very professional finish. Assuming if you use 3 pairs, you will get 0.1deg/watt which is quite sufficient for the lower power Alephs Monoblock. I have built other amps with this and the design looks somewhat like a "diy Mark Levenson ML2"

My 2 cts

ckkt

 

[CH2]

Re: Heatsinks

CH2,

I suggest you look up Suntronics on the 3rd floor of Sim Lim Tower. They stock a wide of Semikron heatsinks and I came across one Model : P180(if I remember correctly!) which is 0.3deg/w per pair at about S$30/- each with a very professional finish. Assuming if you use 3 pairs, you will get 0.1deg/watt which is quite sufficient for the lower power Alephs Monoblock. I have built other amps with this and the design looks somewhat like a "diy Mark Levenson ML2"

My 2 cts

ckkt

Thanks a thousand diyman.

Will check it out.

I just email Avvid singapore distribution office. But have not got a reply from them yet.

Thanks again

CH2

 

[till]

Would anybody be able to state if 1 meter of Fischer SK 85 160*40 mm would be enough for 2 aleph 2 s ?

0,1meter is 0,6K/W so 1 meter should be 0,06 K/W * 600 W = 36 K

36K + 22 °C = 58 °C ?


Data at www.buerklin.com ---> search for 73 B 202

 

[Sysyphus]

contact details

I am in Australia and could ship them from Indonesia, do you have contact details for the manufacturer?

 

[UrSv]

1 meter is only 0.06 if you cut it in 0.1 meter pieces and use them side by side. Should you use 0.2 meter pieces they would NOT be 0.3 each. Check the datasheet for your planned lengths per piece.
/UrSv

 

[A'af]

Hi tjong, where you get/buy your nice heatsink in jakarta, it looks like very interesting, for your nice companion Thanks

cheers,
A'af

 

[uli]

Fischer SK159

😉 Hi, all,
as I´m new to this forum, I say hello from Austria first.
Concerning heatsinks: I built heavily modified Aleph 2´s
(1.2kVA Toroid, 2x25V 24A )with 5A idlecurrent.
I use Fischer SK159 heatsinks (200x300mm) 2 per
monoblock. They do their job (about 350W )pretty well
and don´t cost you an arm and a leg! Price is about
400€ for a stereo pair.
Uli
PS: www.fischerelektronik.de

http://www.fischerelektronik.de/_2002/PDF/Einzel_PDF/A_42.pdf

 

[uli]

SK157

🙄
Sorry, mistake:
Must be SK157! of course
the 159´s are much too expensive!
Uli

 

[Coulomb]

Hello Uli, I am uisng 2 x 1 KVA transformers at 2x40VDC for Aelph 1.2 design. I have dedicated a lot of Heat sink Mass to this project, about 30 pounds worth actually.

Anthony

 

[Mark A. Gulbrandsen]

I still find the least expensive and nicest to deal with for heatsinks is M&M Metals in Texas. www.mmmetals.com
I usee 6 of the MM5061-6 on my ALeph 2's and they run at only 57 deg C. (69 deg F. ambient temp)after being on for several hours with bias set at .5 volts across the drain resistors.
http://www.mmmetals.com/pages/mediu..._heat_sinks/high_power_extruded_heat_sink.htm
Mark

 

[RKC]

I still find the least expensive and nicest to deal with for heatsinks is M&M Metals in Texas. www.mmmetals.com
I usee 6 of the MM5061-6 on my ALeph 2's and they run at only 57 deg C. (69 deg F. ambient temp)after being on for several hours with bias set at .5 volts across the drain resistors.
http://www.mmmetals.com/pages/mediu..._heat_sinks/high_power_extruded_heat_sink.htm
Mark

Do they sell direct to you or do you have to go to one of their distributors? I looked at their website and they're located about 12mi from my house so they would be a great supplier for me if they sell directly. If you don't mind me asking what do the MM5061-6's cost you from M&M? Thx 🙂