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WIGGLING 'LITE' IN GUEST MODE

Presenting: Crowminius
MUFF WIGGLER Forum Index -> Music Tech DIY Goto page Previous  1, 2, 3 ... 39, 40, 41 [all]
Author Presenting: Crowminius
JanneI
I removed the R177 (between VCF and VCA) and took audio out of this point, it's normal level, so the low level output -problem has to be somewhere in the VCA, right?
JanneI
Vca is current controlled, right? Anyway to test separate sections? +10v & -10v points are ok. Loudness t->ts jumpered, (+7,3v). Vca trimmers have effect, env works. Only the output is low level, even the A440. What should I look for?
JanneI
Ok, I think I found the problem. R194&R195 should be 8.2ohm and I have 8k2. Oops eek!

Yes, that was it! I didn't find 8.2ohm so I used 10ohm. Still much closer than 8k2 hihi applause
ElSmurf
JanneI wrote:
Ok, I think I found the problem. R194&R195 should be 8.2ohm and I have 8k2. Oops eek!

Yes, that was it! I didn't find 8.2ohm so I used 10ohm. Still much closer than 8k2 hihi applause


Glad to see you figured it out!
JanneI
ElSmurf wrote:
JanneI wrote:
Ok, I think I found the problem. R194&R195 should be 8.2ohm and I have 8k2. Oops eek!

Yes, that was it! I didn't find 8.2ohm so I used 10ohm. Still much closer than 8k2 hihi applause


Glad to see you figured it out!


Yes, learned a lot! Still one thing to fix, b50k for modmix (vr9) and used bom for laying out components so I used 24k, not 47k as it says on the schematic. It would really be nice if bom would also include these option, both on pot and resistor rows
mutronic
Aside from the stand-alone components, does the eurorack BOM differ that much from the stand-alone BOM for the crowminius?
Staticcharge
mutronic wrote:
Aside from the stand-alone components, does the eurorack BOM differ that much from the stand-alone BOM for the crowminius?

Did you get any response for this question?
I've just bought the v1.3 Eurorack kit from Modular Addict and there is little to no info on the DIY Euro build.

Additionally, The main boards are, as far as I know, the same boards for the stand alone.
mutronic
I didn't get a response to that question, but I figured out you have to do some excel wizardry and convert the csv files to make the BOMs they have posted on Modular Addict legible.
Staticcharge
mutronic wrote:
I didn't get a response to that question, but I figured out you have to do some excel wizardry and convert the csv files to make the BOMs they have posted on Modular Addict legible.

I think it's saved in an old version of Excel, but your right, after a little editing it does become clearer. I have the v1.3/1.31 version, have you got the same? Also the ATTINY85 IC does it require firmware?
Staticcharge
Troubleshooter wrote:
Finished the faceplate and measured and milled out some mod wheels







I'd really like to see this once complete, looking good so far.
evengravy
Hey Crow. I'm (slowly) building my 1.12 board and have some matched TIS97 transistors that I'd like to use in the ladder filter section. Apart from the orientation which is reversed from the 2N3904s the capacitors seem to be the same. Am I correct in thinking that I'll have to swap out the three 150R resistors for 220R if using TIS97.

I'd like to get the filter as close as possible to the original and I have these transistors anyway so I'd like to use them,

Thanks a lot, John

edit: oh, it looks like they're 150R in the original too...I'll just pop these in reversed then, the curve tracer shows quite a difference in characteristics between the 2N3904 and TIS97
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