Found in the street today !

[mcs]

[quote author="Jazzy_Pidjay"]anybody have a schematic for a simple
+15,0,-15 PSU for one channel ?[/quote]
Look at the bottom of this schematic: http://electronics.dantimax.dk/Kits/Filer/ChipVol1_sch.gif

You can use 120R (R9 and R10) and 1k3 (R7 and R8) for 15V. You need 10µF caps on the outputs as well.

Best regards,

Mikkel C. Simonsen

 

[Jazzy_Pidjay]

yes i wanna this real vintage sound !!

i have my ISA220 to sound clean :wink:

thanks for the psu schematics, i build it now !!

 

[Jazzy_Pidjay]

i have TO3 :

LM309K
LM350K
LM338K
LM340K-15 7815
MC7815CK
L7812CT
UA7818KC

which of this can i use ? for +15 and -15 ??

i supposed the 7815 is good for +15 but for -15
i don't know !

 

[NewYorkDave]

Here's a crazy idea: is Pierre Antonini still alive? Perhaps you could contact him and ask if he can supply any information on the console.

 

[Gus]

I did write "might be a good thing to do". The web does limit interactions

Good point about the vintage sound

http://www.national.com/pf/LM/LM107.html is a lower noise version of the 741 if I understand the NS site correctly

That find might be worth fixing if the circuit schematic is OK. Otherwise a cheap M or B could be better.



JP

For the faders measure the outside wiper resistance Then place the slide in the middle and measure middle to each end.

Do that at 1/2 , 1/3 and 2/3 write down the resistace readings. We can use that to find out what the taper(curve ) of the fader is

some log pots are two linear sections at 1/2 10% and 90%

I have read some better ones are a 3 linear sections

Then there are ways of using a lin with a resistor load to get the log type curve.

I would build the SSL tech power supply with good size heatsinks and a 2amp or better transformer at 20-0-20

 

[Jazzy_Pidjay]

great idea, i wanna search for Pierre Antonini

it's ok, i have find that it's the MC7915 for the -15v

 

[Jazzy_Pidjay]

OPTIFILE
Optifile products are manufactured by :
AD SYSTEME
21 Avenue Jean Jaures, 92120 Montrouge
TEL : (33) 01 42 53 31 18 / FAX : (33) 01 42 53 36 775 / E-mail : [email protected]
Contact : Pierre Antonini


i have send the mail :thumb:

 

[mcs]

You poste you have this transformer:

i have a classik (non-toroidal) 220v-15v 3,2VA
it's good i think ?

Doesn't that mean only one 15V winding? If that's the case the schematic I posted will work, but the 7815/7915 schematic will not. You could change the regulator types on my schematic, but the 78/79 regulators may cause problems with the half-wave rectifiers.

Best regards,

Mikkel C. Simonsen

 

[Jazzy_Pidjay]

my 220v-15v has only one 15v out.

mcs, in your schematic i don't understand
the AC

and how the LM337 LM317 know that
the output desired is 15v ?

it's the resistor value ?
so the resistors values
must be very close to the ideal value ?

thanks

 

[mcs]

[quote author="Jazzy_Pidjay"]my 220v-15v has only one 15v out.

mcs, in your schematic i don't understand the AC[/quote]
What AC? You connect the 15V AC from the transformer to JP7.

and how the LM337 LM317 know that
the output desired is 15v ?

it's the resistor value ?

Yes, it's the resistor values. You can calucale them like this:
(15V-1,25V)/(1,25V/120 ohm) = 1320 or 1300 ohms. The voltage will be slightly higher, so if you use 1300 ohms instead of 1320, you should get 15V out.

You can use other values also, but R9 and R10 should be 100-200 ohms.

Best regards,

Mikkel C. Simonsen

 

[mcs]

[quote author="buttachunk"]also 3,2 VA may not be enough-- according to my calc's, 3.2VA at 15v is 214mA. you need twice that amount.[/quote]
For one channel?

Best regards,

Mikkel C. Simonsen

 

[Jazzy_Pidjay]

ok, i don't understand the two
schematics completely so i read it, read it, read it.

i think 3,2VA it's ok for only one channel ? no ?


anybody know how the differents switchs works
the switchs with 12 or 6 pins, i don't understand
and for my schematic i can't continue without this knowledge.

???

 

[Jazzy_Pidjay]

mcs : in your schematic
i connect one out of the 15vAC transformator
at the ground ? and the other at the diodes ?
right ?
:?

 

[mcs]

[quote author="Jazzy_Pidjay"]the switchs with 12 or 6 pins, i don't understand[/quote]
The pushbuttons?

They work like this:

Out:      In:
0| |0     0   0
0| |0     0| |0
0   0     0| |0

Hope that makes sense...

Best regards,

Mikkel C. Simonsen

 

[mcs]

[quote author="Jazzy_Pidjay"]i connect one out of the 15vAC transformatorat the ground ? and the other at the diodes ?[/quote]
Yes.

Best regards,

Mikkel C. Simonsen

 

[Jazzy_Pidjay]

yes pushbuttons :grin:

if i understand correctly

1- the 12pins version is just 2 of the 6pins version.

2- the " | " mean that the interruptor is close.

3- so the pins 3 & 4 (9 & 10) are always connect ?

it's right ?

thanks thanks !!

 

[Jazzy_Pidjay]

Ok!!!!

i understood !!

don't reply the 2- and 3-
of the previous post

 

[Jazzy_Pidjay]

i love this schematic :green:


thanks !!!!!!

very clear for me

 

[Jazzy_Pidjay]

HS: buttachunk what is your schematic software ?

 

[Jazzy_Pidjay]

thanks