The Sontec thread! <ATT. BUILDERS - C22 & C23>

[gyraf]

sub-audio oscillation - check your DC servo circuits..

 

[andre tchmil]

how different is the Sontec from the Manley massive passive, sound wise and layout- construction wise ?

 

[chrissugar]

"how different is the Sontec from the Manley massive passive, sound wise and layout- construction wise ?"

They have almost nothing in common, one is active the other passive, one use opamps as filters, the other inductors and capacitors, one is DC coupled the other has capacitors and transformers in the signal chain.

chrissugar

 

[TomWaterman]

Hi Jaakko!

Are there holes on the PCB for the feedback compensation cap?

I hope you get it sorted out..

Cheers Tom

 

[TomWaterman]

Good news mate.....

its a monster project but I'm sure it will be the most awesome of EQs.

Did you use Panasonic HFS caps for the PSU bypassing as Fred recommends?

Cheers Tom

 

[TomWaterman]

Fred mentions the Panasonic HFS series in his 992 documentation....I'm sure its not an issue.

I would love to hear that comparison when the EQ's done...maybe you could make some small audio files??

How broad is the shelving? Do you have a rough idea of its shape?

Tom

 

[TomWaterman]

Cheers Butta!

Thats good to know.

Tom

 

[Bauman]

Looking forward to know these values dude! Amazing work you´ve done!!

cheers!
Fabio

 

[Bauman]

Way better than timming my friend! Thanks!

Fabio

 

[TomWaterman]

Jaakko - great work!.....

Edited: I get the equation now!

So are you going for values selected from the CraneSong Ibis tables?

Cheers Tom

 

[Gold]

Top notch, or shelf, whichever you prefer! Really great work. I can't wait to see it done.

 

[Bauman]

I was wondering.... how is this thing inside??

This is the input opamp for Sontec MEP250...

cheers!
Fabio

 

[Bauman]

Are there holes on the PCB for the feedback compensation cap?
Nope, but they're easily soldered on the solder side in parallel with the feedback resistor.

Don´t forget you can use the IC DIP holes to do so if you´re using discrete opamps...

cheers!
Fabio

 

[chrissugar]

Hi Fabio, do you have that thing or you are just wondering?
I hope you will give me the right answer. :grin:

chrissugar

 

[Bauman]

I got it and I´m ready to destroy it!! :razz:

Like this answer?

 

[chrissugar]

Congratulation Fabio.That was the right answer. :grin:
Please document the sado-maso action with as many photos as possible. We love porn so hurry up.
:green: :green: :green:

chrissugar

 

[Rob Flinn]

Can someone tell me about R80 on the amp board. On the parts list its specified as 4K7/6K4.

 

[rafafredd]

I don´t remenber any sontec opamp schem...

 

[ciminosound]

Wan't there a schematic fot the Sontec MEP250 opamp floating around on the old site?? Maybe I'm thinking of a different opamp...... :?:

 

[rafafredd]

How the hell my reply to criminosound question is BEFORE the question?
:? :?