NEED help power supply question.

[jleaman]

can any one tell me if there is a problem with this power supply layout. ?

im trying to build to cap banks one for each channel . but using one transformer.

 

[sully]

Yes, you have wired the bridges incorrectly. You have the xfmr feeding into the +/- of the bridges. The xfmr s/b into the ac's, cathode bands to cap +, anodes to -..

Sully

 

[jleaman]

so this will work good good. ill start this tomorrow. as i have the capacitor bank built already. : O )

thanks for the help..

J'

 

[jleaman]

See...

 

[sully]

wait wait...

fix the bridge orientation or you'll ruin something..

I'm not sure from your response that you understood me..

I said "yes" there is a problem..

The double cathode band part of each bridge must be to the positive of the capacitor bank..

Your schematic does not show that..

Sorry if I'm re-hashing what you already know, but I don't want you to blow sumptin up..

Sully

 

[jleaman]

Please remember that the schematic i posted was just a simple layout to ask about the bridge rectifiers layout and wiring. i know how to use them and hook them up i was just asking if it will cause any problems piggy backing 2 of them. i know the pos and neg's of the bridge and the 2 ac's one's. if you want a close up let me know ill show you. : O )

 

[Peter Daniel]

What's the voltage applied and what is capacitors rating? From a pic it looks like polarity of the caps is fine.

The connections in your diagram are obviously wrong, but I hope it's just drawing mistake and not the way you want it done.

 

[jleaman]

the caps at 3300uf 2 60v but the voltages im working with are 40 0 40 after the cap's.

 

[Peter Daniel]

So you got 80V across bridges?

 

[jleaman]

actual i just hooked up the transformer i have and up to this new cap bank. and it is 43.8v 0 43.9v

I'm using a Plitron 500va tranny with extra shielding.

Im hoping that these freds your sending me peter will work with this setup.. as i want to build the best psu for my little blue amp's that i have here. ; O )

 

[sully]

Jason...my apologies

being a newbie here, I don't know your capabilities or understanding.

I don't see any difficulty with the schem otherwise..

You may have to worry bout interchannel grounding issues, but no big issues I can see.

Sully

 

[jleaman]

What do you mean with the inter-channel grounding. ? will i be hearing bussing sounds and stuff ?

 

[sully]

star ground

All the normal crap associated with ground bounce due to high current draws..

A good star ground layout should eliminate all interchannel comm..

Sully