SY1 Replica DIY Kit (General Thread)

[Gryppl]

Doesn’t hurt, I’ve got some small diameter shielded cable - should be easy to install.

Since I don’t have to remove all the hardware to get to these locations, I’ll see where I land on it tonight.

[Altitude909]

The best way would be to tie the shield at the sgnd terminal next to out 1 and2

[Gryppl]

Kicking myself - it’s not osc bleed, just the expected noise from the 497 . Apologies for the confusion, not sure why i thought that.

Since I’ve got it open, I might add a bypass cap to signal ground from the 497 output and see if that helps - as is, it’s totally fine though.

Appreciate the guidance and super sick project!

[Altitude909]

that still doesnt sound right, i looked closely at that and it shouldnt bleed into the audio.

[Gryppl]

Good to know - I’ll try to go through it with a scope this weekend.

[Gryppl]

Fixed it! I had ground and signal ground mixed up, stupid quiet now!

[Altitude909]

Fixed it! I had ground and signal ground mixed up, stupid quiet now!

That's actually quite a revelation, you just figured out why the PSYcox and THC devices have noise problems

[Gryppl]

Ha - Even with those flipped, the power supply noise was still pretty low on my build, def manageable.

I checked Stereoping’s video outlining the noise issue on those versions and it was much more extreme than what I was hearing.

Time to make some tracks with it .

[djthopa]

Hi!

Whats the difference between the old / new pcb out?

Cheers

[Altitude909]

1. Original I/O Configuration: The inputs and outputs use regular 1/4" Mono phone plugs:
Trig 1 In - Trig 2 In - Mute - Tune (via Tune pedal) - Mixed Output

2. Expanded I/O Configuration: The inputs and outputs use 1/4" Stereo to 1/4" mono to greatly expand the capabilities of the device. The Mod input is open for user modification
Trig 1,2 In - Mod 1,2 In - Mute - Tune 1,2 CV in - Output 1, 2

[djthopa]

Hi, ill ask here in case someone has the same questions,

Does this look correct? I dont want to solder it wrongly.

Can all Ic´s be socketed?

Thanks

[Altitude909]

correct

[djthopa]

Hi,

In the ibom for the main pcb, there is a 16b resitor which is 100k, but on the excell bom there is no r16b. There are 2 R16a marked as 2k2 resistors.

Which one is correct?

Cheers

Edit: Figured it out

[djthopa]

Hi again,

For the cv pitch mods.

Are the trimmers recomended in the mod guide for CV1 (10k trimmer) to Tune 1 and Cv2 to tune 2 (100k trimmer) the smd trimmers that are already on the pcb?

Is the smd resistor for Cv 2 tune, 47k, the one one this pic?

Thanks for your support.

Cheers

[Altitude909]

Yeah, I prepopulated 100K on both positions on the kit boards before it was clear what was needed. 100K will be fine for both, just one will be a little trickier to adjust since the range will be large

added a note about that in the bom

[djthopa]

Thanks for the reply.

Do i still need to fit the 47k resistor for cv tune 2 pcb trace?

Cheers

[Altitude909]

Thanks for the reply.

Do i still need to fit the 47k resistor for cv tune 2 pcb trace?

Cheers

Yes, that one is needed. It will be off scale without it

[djthopa]

Thanks for the reply,

Could i replace the 0hm in there for a 47k?

Or i should add it apart?

Cheers

[Altitude909]

Thanks for the reply,

Could i replace the 0hm in there for a 47k?

E06AC07E-81A2-445E-9600-AC1ED6A7C7C9.jpeg

Or i should add it apart?

Cheers

I would replace that one with 47k, it doesnt matter since its the same thing but that will be neater