Solo Dallas - SVDS Replica

[patricef]

Did you make a prototype or just the drawing ?

[boby6kiler]

just the drawning
j attends juste une réponse sur le mail que j e t ai envoyé sur slo mdr pour aller plus loin
ya quelque truc qui me chiffonne niveau alim merci

[GeoffroyLux]

Nice Boby

Smells good I just received my NE570 and LM380 yesterday!
I will try it soon

[patricef]

Some update: on my schematic, R14 should be removed. D3 value is 43A48A.
Voltage, 0V taken from input jack ring:
VCC: 12.09V
IC1 pins:
1: 5.81V
2: 5.82V
3: 5.73V
5: 3.64V
6: 0V
7: 3.64V
8: 11.58V

IC2 pins:
1: 0.95V
2.:1.79V
3: 1.79V
5: 1.80V
6: 1.79V
10: 7.24V
11: 7.24V
12: 1.80V
13: 11.58V
14: 1.80V
15: 1.79V
16: 0.78V

IC3 pins:
1,2,3: 0V
6: 5.06V
7: 11.73V
8: 11:87V

[EddieTavares]

patricef great Job!!!

[apollomusicservice]

Some update: on my schematic, R14 should be removed. D3 value is 43A48A.
Voltage, 0V taken from input jack ring:
VCC: 12.09V
IC1 pins:
1: 5.81V
2: 5.82V
3: 5.73V
5: 3.64V
6: 0V
7: 3.64V
8: 11.58V

Values at pin 6 and 7 on IC1 can't be different.

[patricef]

Some update: on my schematic, R14 should be removed. D3 value is 43A48A.
Voltage, 0V taken from input jack ring:
VCC: 12.09V
IC1 pins:
1: 5.81V
2: 5.82V
3: 5.73V
5: 3.64V
6: 3.64V
7: 3.64V
8: 11.58V

Values at pin 6 and 7 on IC1 can't be different.

My mistake, I rechecked again pin 6 and 7 are indeed at the same voltage.

[patricef]

boby6kiler has been working hard on tracing and verifying the circuit. I'll post an updated version of the schematic soon, stay tuned !

[boby6kiler]

thanks patrice for this one

[patricef]

Attached the latest schematic. Enjoy !

[boby6kiler]

nice schematic patrice

i don't find a good alternative to this :


any idea ?

[EddieTavares]

It looks like a diode, propably a 1n4148 smd version.

[boby6kiler]

patricef mesure 0.246V with the multimeter in diode mode

[EddieTavares]

This is the D5 in the patricief's schematic if I am correct. It looks like a reverse flow protection, I don't believe that it makes any tonal difference...

I believe that the sollo dalas guys tried to reproduce in the pedal every single component present in the original Shaeffer gadget, Why they implement R9, R15 and R17 all 8k2 resistors simply dropping a litle voltage?

[RiGLEY]

nice schematic patrice

i don't find a good alternative to this :
[ Image ]

any idea ?

Yeah, it looks like a diode by Vishay. Can't find anything specific by searching 43A 48A.

[GeoffroyLux]

1N4348 ? Smd SOD-123 size ?
But I didn't find anything

[lovetone]

Hi, I drew this up a while ago and forgot all about it its very close to the schematic drawn by apollomusicservice with slight differences.

At the time I removed some of the surface mount capacitors to check the values so some on this drawing are low values but thats what I measured at the time.

This may help with some of the missing values.

Sorry for the drawing but I don't have a drawing programme.

[boby6kiler]

-the 10nf in ic1 pin 2/1 verified with multimeter removed from the board?
-the 1nf in the area of 8,2k/2,2k verified with multimeter removed from the board?
-the 16pf in ic3 pin 3/6 verified with multimeter removed from the board?
thanks

[lovetone]

-the 10nf in ic1 pin 2/1 verified with multimeter removed from the board?
-the 1nf in the area of 8,2k/2,2k verified with multimeter removed from the board?
-the 16pf in ic3 pin 3/6 verified with multimeter removed from the board?
thanks

Yes as far as I can remember if I could not measure the capacitor in the board then I removed it.

[boby6kiler]

thanks i will try this values