| samsagaz |
hey guys, i ll receive tomorrow my lm4780 and lm3886 chips, ill goto buy 2 power suply today, an normal and try to find an toroidal ... too.
im looking into both datasheets and i see that the power that i need will be <= 80v.
the question that i want to ask is... is ok an power supply with the primary 220v and secundary +80v?
is ok too primary 220v and secundary -40 and +40 ?
sorry for the dumb question :)
thanks.. |
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| pinkmouse |
| I would go for one of about 200 to 300VA with 25-0-25 rails, but if you do a little work and have a look thorough some of the other threads then you will find more than enough info on the best choice for your application. |
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| samsagaz |
well i found some post that say that -25/0/+25 is the best choise....
what abt the amps?
how many ampers?
and latest question... if i ll use bridged chips, is ok to use the same power supply? |
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| carlosfm |
To open this thread you had to select the option "Have you searched? ".
You lied.:eek: :clown: |
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| samsagaz |
no dude, i searched, but i dont understand 100% the posts... ppl say diferent things and the posts talk more than just the simple question....
i searched abt ampers without lucky :( |
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| Peter Daniel |
| 6 - 8 A should be fine. You can go even less if cost an issue. |
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| cowanrg |
people are suggesting a 300VA xformer... that means:
25V + 25V = 50V
300VA/50V = 6A
or, you can go the other way.
25V + 25V = 50V
50V * 6A = 300VA.
there you go. now you can figure it out in the future. |
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| samsagaz |
cant found toroidal power supply in my country :( i can get an 25+25 normal power supply
it will be ok?
it cost me like 50 U$S :( |
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| samsagaz |
| btw, when i asked for the power supply they told me that its an 300watts suply, is that ok? |
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| cowanrg |
$50 isnt bad. and yes, it will work.
a 300 watt supply is roughly a 300va supply. for a gainclone, you should be fine. |
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| samsagaz |
| ok ill buy the normal trafo, btw... ill get too much diference using that isntead an toroidal? |
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| samsagaz |
thanks again dudes... i need an power supply that support 6A on each rail? or just support 6A on both?
understand me? |
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| Peter Daniel |
| on both. it doesn't have to be toroid, regular trafo is OK too. |
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| samsagaz |
thanks peter....
one last question (before burn my speakers) :D
i have an schematic that use some strange CAP, MKS4CAP and elko5, i cant find that stuff in my country, what other caps can i use??
the schematic say
elko5 68uF 16V
and
MKS4CAP 1uF
btw
300watts power supply = 50v*6Amps => its the power that i need, right? :D
ill buy the power in just 1 hour.....
(they need 1 week to send me the power supply) is not an standar value.. |
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| Peter Daniel |
Just use any caps that you have (similar value though).
>300watts power supply = 50v*6Amps => its the power that i need, right? <
Yes. |
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