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Old 24th May 2010, 08:44 AM   #1
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Default Aleph 3

Hello
I whant build Pass Aleph 3 and i whant to know some things
On the board i must put 220uF electrolitic capacitor but i dont know whitch voltage ( i think that 25V be just fine )
and i whant put nichicon KZ 220uF/25V or be better to put 220uF/50V
Can someone say another capacitors ( black gate, elna silmic or vishay bc or something else whitch be better)
Resistor 0,47Ohma must be 3W or 5W i whant put mills ressistor 5W 0,47Ohma ( some sugestion please )
I whant make power supply with 2 toroidal transformer 2X18V 300VA it is enough. I will use panasonic 22000uF/35V ( 4 for chanel ) without R or L between capacitors
any advice is welcome
many thanks
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Old 24th May 2010, 09:19 AM   #2
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Hello again
i have another one question whitch heatsink ( from fischer elektronik or someone else ) you prefer for aleph 3
thanks
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Old 24th May 2010, 09:20 AM   #3
THS is offline THS  Greece
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Hi,
Better prefer 220uF/50V elec. capacitors, because 25V is the rail voltage and you will be on the limit using 25V capacitors.
Regarding the resistors you can use anything from 3W and up. Better look for not inductive resistors.
As for the power supply the transformers and the capacitors you want to use would be ok (if you manage to find 22000uF/50V it will be better for longer life and reliability).
Don't forget to use inrush current limiters (CL-60 thermistors) in series with the transformers primary.
Happy building
Thanasis
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Old 24th May 2010, 01:27 PM   #4
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Thanks for replay

now i must see what heatshink type i be use
any assistance is kind
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Old 24th May 2010, 07:56 PM   #5
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Hello its me again
i need help that i chose heat shink i think something from fisherelektronik or you people know something else and link to shop of heatshink
thanks
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Old 24th May 2010, 08:50 PM   #6
Zen Mod is offline Zen Mod  Serbia
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it's easier that you make little research what's already available of fisher heatsinks in your country then inform us here , so we can help you to choose

in any case - you need 0,25K/W piece per channel , taking in account 100W of dissipation/ch and your climate
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Old 28th May 2010, 03:15 PM   #7
karajak is offline karajak  Greece
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thanasis hi ! do you have any idea where can i find those thermistors ;(cl60)
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Old 28th May 2010, 05:42 PM   #8
THS is offline THS  Greece
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Hi karajak, look at these links. Prefer RS (more expensive but is a real pain to order from US)
CL-60 GE | Thermistor; 10 Ohms @ 25 C; 5 Arms (Max. | 2508822915 | ????? ?????? ???? RS Online

Digi-Key - KC006L-ND (Manufacturer - CL-60)
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Old 29th May 2010, 02:23 PM   #9
moe29 is offline moe29  United States
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Quote:
Originally Posted by vksamael View Post
Hello again
i have another one question whitch heatsink ( from fischer elektronik or someone else ) you prefer for aleph 3
thanks
BIG ONES!

choose one you like, then get one twice as big. that's a good starting point.
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Old 1st June 2010, 08:44 PM   #10
karajak is offline karajak  Greece
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thanasis many thanks !RS

is fine.
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