Schematic Solid state (2520) Pultec?

Does anyone have a schematic of this solid state Pultec EQ, the one that uses the 2520 DOA?

Nobody? :sad:

this might have some info you need, If anything it has info on the Lang EQ which was a solid state pultec style eq

has the schemo too

http://www.danalexanderaudio.com/Outboard.html

Thanks, a lot of info there indeed...
I emailed Dan about the schematic.

Hi Radiance,


let us know if you have any luck. I'm researching building a mastering eq at the mo and would be interested in this topology,

cheers,
Ruairi

Dan told me the Schematic does not exist...OTOH, it should not be too hard to find out how to implement an 2520 opamp as gain make up stage.
I was just curious if there was a schematic...

I wouldn't be surprised if it looked something like this, with the familiar EQP filter section in front of it.

Thanks Dave!

...

Thanks drpat :thumb:
I have a question though: what is the value of the U2M (the one between the + input of the 2520 and ground) cap? It reads 10 MMF ?

Thanks again!

micro-micro-farad (aka "mickey mike") = picofarad.

[quote author="radiance"]Thanks Dave![/quote]

...

[quote author="drpat"]
Since the Sowter inductors and Fabio's 2520 boards are now available, I've been wanting to attack this. However, I'm very indecisive about which trannys to use in place of the HS56V; that's a HUGE part of the sound.[/quote]

Sowter makes Triad HS-56 replacement trannies.

http://www.sowter.co.uk/specs/3603.htm

Those are 32 GBP.....

I'm building another Solid state one as well...this time with the 2520's and maybe the Sowters...
What about those sowter inductors? Do they contribute much to the sound? I'll first try some selfmade inductors I guess...

...

I think cayacosta and jrmintz used the inductors from Sowter and maybe traffos.

http://www.groupdiy.com/index.php?topic=4088