Sontec: hardware bypass, balanced THAT I/O, MS, power supply - at one PCB!

[protools]

Why not.....

 

[cstella]

Very impressive! Quite a challenge doing this one all stepped. Well done.

 

[Igor]

My $ 0.25: very nice work! Great porn, though. Fap-fap-fap-fap-fap-fap-fap-fap-fap

 

[Igor]

Front and back panels - Corel, plt and cnc files: http://ij-audio.com/downloads/MSTEC_ENGRAVING_COREL.rar

 

[Nobieesd]

Not ready build
Just the frontplate

 

[Igor]

Yumm!!! Front panel express engraving?

 

[dagoose]

That panel looks a lot like mine  8)
Peter did a great job again!
http://www.dagoosemusic.nl/?p=ultimate-eq

 

[Nobieesd]

@ Igor
not express, it took several Wekks/months waiting time from grandmaster-audio,
but i had the time, so it was really no problem

and a information for you, today arrived my M/S PCB from the duty administration
awesome quality ! And thnx again for your help !

Just a little question for the build:
I've seen i will need a Discrete Opamp. And you used in the Prototype some DIY DOA's
Where can i get them/the pcb/ bom ?

@ Dagoose

just a little bit

But mine is with the M/S mod !

yes Peter did it great !
Awesome Looking

 

[Nobieesd]

Hey guys, i have some problems with the DOA's

I haven't used one till now,
the problem is just i have no idea where to get them

I would also use forsells opamps, or whatever is good there
But i cant find anything where to buy them ?

Or is it maybe possible to use a  604/2604 IC with an adapter ?
Have I anything to note when i do this ?
regards

 

[Igor]

opa604 with an adapter will work fine here.

 

[Nobieesd]

Thanks for your answer
Buuuuuut:

I've now organized 2 of the new DOA's from PPa
Some other people liked them really in the normal sontec, so i'm glad to get them for my MS sontec *smile*

 

[druu]

Has anyone used this board in a Tat case? Looks like it will be a very tight fit, if it fits at all.

 

[Sylvain D.]

hey druu,

I got one and unless someone has a magic trick, it does not fit in "my" Tat case. It is 7 inches deep.
The Sontec filter boards are about 2 inches deep, and the M/S-I/O board is 5.5 inches deep.

So if we do the math, it does not fit. (7.5 inches wont fit in a 7 inches box)
I even considered inserting the M/S board between the filter boards, but the doa are too thick to fit between them.

So this has kind of forced me into re-casing my Sontec. And I figured while I'm at it I may as well go all-out and put it in a 3U case with switches 8)

I am now on a quest for a 3U front pannel design...
But I digress... :

 

[druu]

Thanks for the update Sylvain, quite unfortunate.

I'd probably go the same route as you (3U, switches) but that will have to wait.

 

[ilfungo]

hello
I would like to build a stereo version ( mastering) , but stepped,
Who can help me?
Can you tell me how to calculate resistor values​​?
I saw that someone made it, help ...
thanks

 

[kante1603]

hello
I would like to build a stereo version ( mastering) , but stepped,
Who can help me?
Can you tell me how to calculate resistor values​​?
I saw that someone made it, help ...
thanks

Hello,

Member Harpo did a nice calc sheet in the other thread,look here:

http://www.hausverwaltung-heger.de/al_leck_trick/SontecCalc_Igor.xls

Hope to have helped,

Udo.

 

[ilfungo]

Thanks kante1603

 

[ilfungo]

Sorry this relay can work?
Alternative?
Thanks

http://it.farnell.com/omron-electronic-components/g2r-24-12dc/rele-dpdt-sigillato-5a-12vdc/dp/2068197?in_merch=New%20Products&in_merch=Nuovi%20prodotti%20in%20primo%20piano&MER=i-9b10-00002068

 

[Nobieesd]

Can you tell me how to calculate resistor values​​?

this was a post from dagoose in the main Thread:

"
Did some calculating and things for the switches and i come up with 21 steps which is nice becaus eon the gain you have 10x up and 10x down and step 11 = 0
I'm wondering concerning the freq switches, why is it that the high shelf switch has different values for the resistors then the other switches when you calculate them?
Is it because of the highest freq for shelf will be to high if you use the same values? step 21 is 365r with low/mid/hi but with the shelf the value is 576r.

I came up with this for thefreq pots/switches.

FREQ band = 101k total

1
  20k
2
  15k4
3
  12k4
4
  10k5
5
  8k25
6
  6k8
7
  5k36
8
  4k64
9
  3k6
10
  2k94
11
  2k4
12
  1k96
13
  1k54
14
  1k3
15
  1k07
16
  820r
17
  681r
18
  560r
19
  442r
20
  360r
21


Gain switches 48k2 total amount

1      -12db
3k9
2
  3k3
3
  3k
4
  2k7
5
  2k4
6
  2k2
7
  2k
8
  1k8
9
  1k5
10
  1k3
11      MID position =0
  1k3
12
  1k5
13
  1k8
14
  2k
15
  2k2
16
  2k4
17
  2k7
18
  3k
19
  3k3
20
  3k9
21      +12db

"

 

[Igor]

Google or search here for SontecCalc_Igor.xls for FREQ pots as well.