9K PSU transformer question/problem

[jeroddumas]

Thats a typo. You can also use drv134. I would like to know where everyone is getting their power transformer from???

 

[Rob Flinn]

Thanks Jonathan. Is it OK (I think this is what Rob is referring to?) to use the 2nd PSU PCB with 7815 and 7915 regulators to supply the TL052 IC's?

If so does this PSU PCB need to be modified at all other than the Regulators for +-15VDC?

Exactly Blade, just put different regs in there. The cap values can be exactly the same as for the other board.

 

[BladeSG]

Thats a typo

Thanks jerrodumas, that's what I thought.

just put different regs in there

Thanks Rob, that'll make it a cinch.

 

[cactus]

while we're here, what values should the bridges be on keith's P/S?

 

[Rob Flinn]

while we're here, what values should the bridges be on keith's P/S?

I used the W08m rectifier, & it seems to work fine

 

[BladeSG]

I'll be using the W04 bridge.

 

[drpat]

____

 

[asm]

im confused now. rob is the only person ive seen use 2 psu boards, one for 18+- and one for 15+-. how else can you power the 15+- with the same board like everyone else is doing? and why isnt there a 15v rail on the psu board if the main board calls for 15v?

 

[gar381]

A good trafo to use for psu is digikey part #TE62074-ND...
its a 18-0-18 @35va made by AMVECO. You could power up the
ssl9k with only a15v split supply if you want but if you have 2 psu boards
make one 15v and the other 18v. DO NOT RUN THE TLO52 on 18v
as this will exceed its rating. Hope this helps. Oh btw you can
run a bunch of ssl9k pres with this trafo and 2 psu boards.

GARY

 

[asm]

a 'bunch' being..... ?

ive got 4 9k boards. any advice? id rather not have 4+ power cables going to the rack if possible.

thanks for that part #!

 

[gar381]

Hi ASM

Will power 4 just fine!!!

GARY

 

[asm]

gotcha.

so i should have one trans for powering the 15v board which runs to 4 9k's. and another thrans that powers the 18v board that runs to 4 9k's.
right?

 

[drpat]

____

 

[asm]

you'll be able to power 38 ho'ho's or 14 starcrunches with that setup.

 

[gar381]

you can use 2 trafos if you like but 1 trafo feeding the input to both
+-15v and +-18v psu boards will work fine.


Gary

 

[asm]

what regulators will i have to use now since i need to output 15v instead of 18v from the PSU board?

thanks.

 

[gar381]

asm

Use 7815 & 7915 for the 15v psu

Use 7818 & 7918 for the 18v psu

All other parts ae the same for both boards.


GARY

 

[Sammas]

ok so let me see if its all going in...

you build 2 of Keiths PSU's... one covering 15v (7815 & 7915) and another covering 18v (7818 & 7918). Both can be powered from the same transformer... and 4 9K's can be powered from the 2 supplies...

Now help my virgin DIY arse out and tell that im right when i assume the 9K are all wired in parallel to the PSU's.

Then i can slap in some JLM "Go between Kits" to simply add a DI, phantom power (since the 18v board is providing 48v too) and phase and we are in SSL wonderland?

http://www.jlmaudio.com/JLMDI.htm <- go between kit...

 

[gar381]

Hi Sammas

You got it!!

The answer is YES :grin: :grin: :grin:

GARY

 

[Svart]

two 15v zeners and some resistors ought to bring the 18v down to 15 for the tl0XX parts..