Search found 1100 matches

by djs
Thu Feb 25, 2021 1:21 pm
Forum: Music Tech DIY
Topic: Heads up: Mouser is fairly f'd right now
Replies: 18
Views: 618

Re: Heads up: Mouser is fairly f'd right now

I remember seeing a post from Paul S a few days ago saying that mouser had a backlog in the range of 50-60k orders due to the storm.
by djs
Wed Feb 24, 2021 9:47 am
Forum: Music Tech DIY
Topic: Mixer volume goes down after 30 mins + distortion [SOLVED]
Replies: 11
Views: 153

Re: Mixer volume goes down after 30 mins + distortion. Help needed.

You might have a feedback loop sucking up the bandwidth on one of the op amps. How come you don't have a cap in the feedback path on the U2.2 opamp?
by djs
Fri Feb 19, 2021 12:58 pm
Forum: Music Tech DIY
Topic: Buchalish 111 Ring Mod PCBs
Replies: 192
Views: 20696

Re: Buchalish 111 Ring Mod PCBs

Zooming in on the pcb, the header for -v is there, but not connected to anything. Which would match the schematic for no -V needed:
by djs
Wed Feb 17, 2021 10:54 pm
Forum: Music Tech DIY
Topic: Buchalish 111 Ring Mod PCBs
Replies: 192
Views: 20696

Re: Buchalish 111 Ring Mod PCBs

Speaking of mix and match- this one has a 208 random voltages and noise from fluxmonkey. Plus half of a 156 that I made myself (untested yet)
by djs
Wed Feb 17, 2021 12:30 pm
Forum: Music Tech DIY
Topic: Troubleshooting EQ/bandpass circuit
Replies: 5
Views: 132

Re: Troubleshooting EQ/bandpass circuit

Maybe it's just me, but the cap values seem a little high... what if you switched them to 10nf or lower?

Also, the "oddly static" output sounds like some sort of clipping? Can you do a scope trace before and after?
by djs
Thu Feb 11, 2021 3:52 pm
Forum: Music Tech DIY
Topic: Where are the DIY analog polysynths?
Replies: 56
Views: 9955

Re: Where are the DIY analog polysynths?

Massimo- this is amazing. Is this based on the crowbx boards or something else?
by djs
Wed Feb 03, 2021 2:37 pm
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - AUDIO DEMO
Replies: 106
Views: 6051

Re: PROGUE - Analog mono synth - AUDIO DEMO

Great looking website! Can't wait to see the pcbs!

Assuming you'll also sell the cases too?
by djs
Wed Jan 20, 2021 1:04 pm
Forum: Music Tech DIY
Topic: Power issue!
Replies: 12
Views: 179

Re: Power issue!

Without a meter it's hard to tell, but I'd be willing to bet something is off with the meanwell. Either it's wired wrong, or it's -12v rail is grumpy.

FYI- I'm not sure where you're at, but I use a multimeter that I got for 6$ for my DIY stuff.
by djs
Wed Jan 20, 2021 12:21 pm
Forum: Music Tech DIY
Topic: Power issue!
Replies: 12
Views: 179

Re: Power issue!

What are you using for the wall power? Is it a wallwart, or something else?
by djs
Tue Jan 19, 2021 5:04 pm
Forum: Music Tech DIY
Topic: A couple of bench power supply questions
Replies: 5
Views: 228

Re: A couple of bench power supply questions

Forgot to mention- Parallel would be if you wanted to create two different supply voltages- like +12v and +5v, but with no negative... just the positive and ground.
by djs
Tue Jan 19, 2021 5:03 pm
Forum: Music Tech DIY
Topic: A couple of bench power supply questions
Replies: 5
Views: 228

Re: A couple of bench power supply questions

What I'm wondering is about running it all for Eurorack - I imagine I'll run the two 12V channels in series and treat their junction as ground, right? Then, can I then connect the 5V's negative pole to said ground to make sure they all have the same ground? I'm new to bench supplies but assume that...
by djs
Mon Jan 18, 2021 12:18 pm
Forum: Buchla, EMS & Serge
Topic: Buchla-Style Banana Touch Keyboard Clone?
Replies: 11
Views: 587

Re: Buchla-Style Banana Touch Keyboard Clone?

There was this a while ago, but it fell off the map:

https://www.modulargrid.net/u/other-unk ... ouchplate-
by djs
Sat Jan 09, 2021 9:00 pm
Forum: Music Tech DIY
Topic: PROGUE - Analog mono synth - AUDIO DEMO
Replies: 106
Views: 6051

Re: PROGUE - Analog mono synth - AUDIO DEMO

Yes! Any estimate on cost of the boards?
by djs
Tue Jan 05, 2021 1:46 pm
Forum: Artist Discussion
Topic: Ravey Go Happy :love:
Replies: 13
Views: 284

Re: Ravey Go Happy :love:

HR3 Clubnight mixes on tape wasn`t less party than being in the club on the dancefloor. Was in college from 94-98, and a friend of a friend got me copies of some of the HR3 clubnight mixes on tape. These got me through a lot of hard times. I know they have an archive someowhere... I should go downl...
by djs
Mon Jan 04, 2021 11:00 am
Forum: Music Tech DIY
Topic: Choosing capacitor max current
Replies: 7
Views: 191

Re: Choosing capacitor max current

You'll never go wrong with using a higher than planned voltage rating- ie. 50v in your question above. Also, depending on the circuit, it's unlikely that you'll have a cap that is between a 24v swing (+12-> -12), but your logic is sound. If you go with 50V for everything, you're unlikely to have any...
by djs
Thu Dec 31, 2020 11:34 am
Forum: Music Tech DIY
Topic: Steda Electronics SR-909 Full kit for $909
Replies: 104
Views: 12183

Re: Steda Electronics SR-909 Full kit for $909 last 3 days!

If we want to buy just the case, is it possible? If so, what would be the cost?
by djs
Wed Dec 23, 2020 9:51 am
Forum: Music Tech DIY
Topic: Noob With a Busted Waldorf 2-Pole Filter - Anything I Can Do?
Replies: 9
Views: 205

Re: Noob With a Busted Waldorf 2-Pole Filter - Anything I Can Do?

Ok- so that rules out the jacks. It might be one of the op amps on the incoming or outgoing signal. Do you have a picture of the interior?
by djs
Wed Dec 23, 2020 9:47 am
Forum: Music Tech DIY
Topic: Noob With a Busted Waldorf 2-Pole Filter - Anything I Can Do?
Replies: 9
Views: 205

Re: Noob With a Busted Waldorf 2-Pole Filter - Anything I Can Do?

If you have the Activate switch off, does it pass through the original signal? At the same volume?
by djs
Tue Dec 22, 2020 8:52 am
Forum: Music Tech DIY
Topic: Modular Addict taking a break?
Replies: 53
Views: 3359

Re: Modular Addict taking a break?

You might be able to grab it off archive.org? I just tried, but their page is not working.

FYI- Modular addict is definitely up and running. Just got an order from them in the mail on Saturday.
by djs
Sat Dec 19, 2020 9:03 am
Forum: Music Tech DIY
Topic: Any clue what this switch is? (Quasimidi Rave-o-lution 309)
Replies: 6
Views: 226

Re: Any clue what this switch is? (Quasimidi Rave-o-lution 309)

Batchas- the ones I got for my MidiALF sequencer have you buy/install the led separately. I don’t think they come as one unit.

Glad you found a solution!
by djs
Fri Dec 18, 2020 1:55 pm
Forum: Music Tech DIY
Topic: Any clue what this switch is? (Quasimidi Rave-o-lution 309)
Replies: 6
Views: 226

Re: Any clue what this switch is? (Quasimidi Rave-o-lution 309)

Not exactly the same switch, but these are kind of close?

https://www.digikey.com/en/products/det ... gCIgC6AvkA

it's probably a variation on this part.
by djs
Mon Dec 14, 2020 2:29 pm
Forum: Music Tech DIY
Topic: Steda Electronics SR-909 Full kit for $909
Replies: 104
Views: 12183

Re: Steda Electronics SR-909 Full kit for $909 last 3 days!

Not the full 909, but I got a sequencer pcb (plus components) from him a while ago. Well packed and looks great!
by djs
Sun Dec 06, 2020 7:58 pm
Forum: Music Tech DIY
Topic: techs in America
Replies: 1
Views: 138

Re: techs in America

To fix something or build something? And where are you located?
by djs
Tue Nov 10, 2020 9:10 am
Forum: Music Tech DIY
Topic: DIY Trade Thread [ Parts, PCBs, Panels ]
Replies: 898
Views: 156923

Re: DIY Trade Thread [ Parts, PCBs, Panels ]

This is a set of 4 pcbs that can be used to make LED ring type controllers, plus 5 midibox pcbs to make it work (DIN R5, DOUT R5, MBHP_AINSER64, 2xCORE_LPC17). Also included is some resistor networks that I think are part off the midibox pcbs (I haven't checked). Nothing is soldered in to any place...
by djs
Mon Nov 09, 2020 12:25 pm
Forum: Music Tech DIY
Topic: Korg DW8000 lost screws after repair, help finding sizes?
Replies: 3
Views: 80

Re: Korg DW8000 lost screws after repair, help finding sizes?

Guess I figured the manuals online wouldn't have screw sizes for whatever reason. Lesson learned. Some do, some don't. I like the ones that mention all the physical components, because sometimes you need to replace some plastic part, and it's easier when you have the exact part # :) Good luck fixin...

Go to advanced search