powering gain clone and active equalizer

[David B]

This is a dumb noobee question but I'm hoping someone can help me.

I'm building a gainclone and want to put an active equalizer (4th order LR) in front of it. Needless to say, the PS voltage for the equalizer is different (lower) than the gainclone. I have a design for the power supply for the equalizer (from the Linkwitz lab pages). Will there be any problems if I power the GC and the equalizer each from their own power supply, or should I try to figure out a dropping resister to get the right voltage for the equalizer off of the GC power supply? or is there a better approach?

TIA,
David

 

[JoeBob]

Seperate PSUs would be the ideal solution.

 

[David B]

decoupling caps?

Thanks, Joe -

In that case, would I need decoupling caps after the equalizer and before the GC -- or is it safe to try it without and see what happens? If caps are required what value should I try?

- David

 

[JoeBob]

If your equlization stage does not put out any DC offset, then you should be fine. Test it without a cap into a resistor as a load, if there isn't DC offset you're all good to go.

 

[David B]

thanks

Great! Thanks, JoeBob

 

[-_nando-_]

Can you put the equalizer schematic please?

I need one !

 

[heater]

How about this one:

http://sound.westhost.com/project75.htm

 

[sagarverma]

Seperate PSUs would be the ideal solution.

y?

deriving voltage for preamps from amp supply works fine too.

use following ckt,its working great for me,all res and diodes r atleast 1w.

 

[-_nando-_]

How about this one:

http://sound.westhost.com/project75.htm

WOW


I just want something like 5 bands or less !

 

[sivan_and]

Add diodes as shown and see the results !!!

 

[sagarverma]

Add diodes as shown and see the results !!!

diode numbers and ratings?
is it really good?

 

[rehanabid]

for equalizer i would go for PT2388, stereo preset equalizer, with bass boost from princeton technology, minimm external parts count and sounds great as well

 

[sagarverma]

hi abidr,

can u send me the datasheet or post a download link.googled but zilch.

 

[rehanabid]

http://www.princeton.com.tw/webSite/temp/products.asp, look into multimedia audio controller series, and in that menu choose preset equalizer u ll get to PT2388, i have bought about 50 of these beauties recently and man they sound good.

 

[sivan_and]

Use IN4007...reduces chances of "motorboating" !!1
GDluck

 

[sagarverma]

thank u guys.