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Syncussion SY-1 build thread
MUFF WIGGLER Forum Index -> Music Tech DIY Goto page 1, 2, 3 ... 11, 12, 13  Next [all]
Author Syncussion SY-1 build thread
dsf
Since i'm awaiting my kit i wanted to start a thread about it's build, so we can gather all information about it, gorup buys and etc...

So far it looks to be a problem with the Apem Switches, as they aren't available in Mouser until August and they don't seem to be available anywhere else.

Mouser cart posted by Bugbrand on the other Thread:

https://www.mouser.co.uk/ProjectManager/ProjectDetail.aspx?AccessID=12 4d5dd0a6

EDIT! Updated Mouser cart with missing parts replaced (except MHS switches)

https://www.mouser.de/ProjectManager/ProjectDetail.aspx?AccessID=39904 98613

From the SY-1 build page, there seems to be three errors on the PCB:

1 - "Board 1, The pinout of the noise transistor is wrong. It’s labeled as EBC from top to bottom, but it should be CBE instead. A BC547 will fit with the silkscreen and work well."



2 - "Board 1, The rate slider for the LFO might kill the LFO when it’s at bottom. Increase the 470Ω resistor next to it to something between 560Ω and 1k depending on your preference. This might not affect all builds."

3 - "Board 2 & 3, Four resistors are marked with the wrong value – One 100k and one 47k on both boards. See image for their location."

BugBrand
Here's the link for build doc (not all up yet): http://build.thehumancomparator.net/

For point 3 - Jon doesn't say which becomes 47k and which becomes 100k, so I emailed him to see if he can update the page for clarity.


Edit - ah, *I* was confused [having not seen the actual PCBs] - yes, the printed values are 47k and 100k and these become 22k.
mush
The screenprint says 47k and 100k. You should use 22k like the board screenshot.
timpecter
I'm assuming this requires an AC adaptor - what is the spec for that?
duff
timpecter wrote:
I'm assuming this requires an AC adaptor - what is the spec for that?


DC - check the BOM
mOBiTh
Got my kits! SlayerBadger!

Shame the switches aren't available confused

Also, what's with the carbon film resistors in the BOM?
mush
mOBiTh wrote:

Also, what's with the carbon film resistors in the BOM?


Keeping it as close to the original as possible. wink


...Well, I believe that is what Jon actually thought when he decided on using carbons'. smile
mOBiTh
mush wrote:
mOBiTh wrote:

Also, what's with the carbon film resistors in the BOM?


Keeping it as close to the original as possible. wink


...Well, I believe that is what Jon actually thought when he decided on using carbons'. smile


ok I'll ask him if he's tried both
AThousandDetails
Anybody found the missing BOM parts in other sites like RS/ Farnell? Mouser is pretty much out of stock on many stuff and delivery dates are like September / October for some!
prae
Someone's trying to organise a group buy from TaoBao for the missing parts

https://www.facebook.com/groups/237916856594386/
sixty_n
Got my kit through today.
What are the missing parts (except the Apem switches mentioned above?

(I don't have a facebook so can't get into the link so apologies for asking stuff that is covered there)
fluffymuff
Does anyone know if it would be ok to swap the BC547 and BC557 matched pairs for 2N3904 and 2N3906 matched pairs? This thread seems to indicate it is ok:

https://www.muffwiggler.com/forum/viewtopic.php?t=11420&sid=1d8887ef54 37ba4db6b1fccbd906b046

The reason I ask is Thonk sell 2N3904 and 2N3906 matched pairs and I'd rather just buy them matched rather than try and match them myself, unless someone can recommend an idiot proof way of doing it.
BugBrand
I always saw them as pretty much interchangeable - BUT - def check on the datasheets because I have a distinct feeling that they should be used in opposite orientations! [but has been a while since I used them, so -- go check yourself!]
member123
AThousandDetails wrote:
Anybody found the missing BOM parts in other sites like RS/ Farnell? Mouser is pretty much out of stock on many stuff and delivery dates are like September / October for some!


I got the worlds worst shopping experience and some missing caps (UST1H0R1MDD & UST1HR47MDD) from http://www.tme.eu.
prae
My kit arrived yesterday. Looking forward to assembling a whole bunch. Not sure about the missing parts as I've not had the chance to even order the mouser basket yet!
fluffymuff
BugBrand wrote:
I always saw them as pretty much interchangeable - BUT - def check on the datasheets because I have a distinct feeling that they should be used in opposite orientations! [but has been a while since I used them, so -- go check yourself!]


Thanks bugbrand. Looking at the datasheets it looks like you are spot on about the orientation:

http://www.futurlec.com/Transistors/BC547.shtml
http://www.futurlec.com/Transistors/2N3904.shtml
Heavy Metal Kid
Following the thread.
BugBrand
member123 wrote:
I got the worlds worst shopping experience and some missing caps (UST1H0R1MDD & UST1HR47MDD) from http://www.tme.eu.


Can you give more details on why this was so bad? (sorry for off-topic)
I've just processed my first order with TME, so..
[I only came across them recently - recommended in other threads in the forum - they appear to have good prices and certainly appear to have quality stock available - guess I'll see...]
JanneI
fluffymuff wrote:
Does anyone know if it would be ok to swap the BC547 and BC557 matched pairs for 2N3904 and 2N3906 matched pairs? This thread seems to indicate it is ok:

https://www.muffwiggler.com/forum/viewtopic.php?t=11420&sid=1d8887ef54 37ba4db6b1fccbd906b046

The reason I ask is Thonk sell 2N3904 and 2N3906 matched pairs and I'd rather just buy them matched rather than try and match them myself, unless someone can recommend an idiot proof way of doing it.


Do they really need to be matched pairs? If so, give this a read: http://www.dragonflyalley.com/images/TransistorMatching/ianFritz-trans mat0011_144.pdf
sixty_n
I was just going to use some I have on cut tape and assume the ones next to each other on the tape are matched enough. Theres quite a lot of space on the board around the matched transistors so it will be easy to swap them out if it needs closer matching.
dsf
Still waiting for my kit to arrive. I guess it'd be easier to match 'em since first time, in my experiemce it does make a difference in performance, not to mention there are two identical channels and it would be good to have them as close as posible, at least imho smile
JanneI
Where in BOM or Build instructions it's said that you have to use a matched pairs? Which transistors, Q?-?? There is 66 NPN's and 40 PNP's, that's a lot of matched pairs ;-)
member123
BugBrand wrote:
member123 wrote:
I got the worlds worst shopping experience and some missing caps (UST1H0R1MDD & UST1HR47MDD) from http://www.tme.eu.


Can you give more details on why this was so bad? (sorry for off-topic)
I've just processed my first order with TME, so..
[I only came across them recently - recommended in other threads in the forum - they appear to have good prices and certainly appear to have quality stock available - guess I'll see...]


Sorry for being imprecise smile I just meant that their site and checkout is really hard to navigate. Though, their delivery speed and packaging was flawless!
mush
Zthee has built without matched pairs and claims it is good enough.

I measured 10 or so from my tape and they were all close enough - so I just used them from the tape and it sounds just like my old SY1 did.

It is a drumsynth, and the circuit is quite primitive, so I wouldn't worry too much about matching. The tracking is about 4 octaves at 1v/oct, I doubt you can get it much better with that circuit design anyway...
dsf
mush wrote:
Zthee has built without matched pairs and claims it is good enough.

I measured 10 or so from my tape and they were all close enough - so I just used them from the tape and it sounds just like my old SY1 did.

It is a drumsynth, and the circuit is quite primitive, so I wouldn't worry too much about matching. The tracking is about 4 octaves at 1v/oct, I doubt you can get it much better with that circuit design anyway...


True, thats good to know. 4 octaves is more than enough, that's quite good, did you do a side by side with your Original SY??
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