Search found 2032 matches

by fuzzbass
Mon Jun 01, 2020 2:28 pm
Forum: Music Tech DIY
Topic: [Order] TTSH Shapers Mod
Replies: 117
Views: 7542

Re: [Order] TTSH Shapers Mod

Bump... see OP for details of new bug found and suggested fix.
by fuzzbass
Sun May 24, 2020 7:44 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

I went through the calibration process again and the noise output is supposed to be 10vpp I am thinking of just upping the resistor on the output. Is there any reason why that would be a bad idea? Also when calibrating the VCOs I plugged a TR cable into the headphone out and got some smoke from the...
by fuzzbass
Tue May 19, 2020 12:21 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

Hi Guys! I just wanted to take a minute and thank everyone on here for being thoughtful and attentive. This was my first build outside of a couple Eurorack kits, and I am really grateful to this community for existing and being supportive. A super big thanks to Fuzzbass and Synthcube for their orga...
by fuzzbass
Mon May 18, 2020 11:36 am
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

So I finished the build and started testing and calibrating. Everything works as it should, but almost none of my voltages are correct. all of the oscillators are between 10.4-10.6 vpp even when swapped between the various sockets. filter when closed after matching the output osc1 square wave to th...
by fuzzbass
Sat May 16, 2020 1:51 pm
Forum: Music Tech DIY
Topic: Two Thousand Six Hundred (TTSH) Ver.2 General build thread
Replies: 1486
Views: 84267

Re: Two Thousand Six Hundred (TTSH) Ver.2 General build thread

Hamildad, did you use the little riser PCBs for your switches? If you did, check to see of the one in VCO2 is rotated 180 degrees. If it is, this can short something out in the CV summing section. (for what it's worth, I have always advised people not to use these).
by fuzzbass
Mon May 11, 2020 2:45 pm
Forum: Music Tech DIY
Topic: Two Thousand Six Hundred (TTSH) Ver.2 General build thread
Replies: 1486
Views: 84267

Re: Two Thousand Six Hundred (TTSH) Ver.2 General build thread

Back on finishing my Synth DIY shelf of shame and this is the biggie. put a new video on Instagram, and asked for help. https://www.instagram.com/p/CAAy4NiBEzZ/ most people suggest a floating ground, but I have no idea how to systematically test for one, and looking into floating ground via search ...
by fuzzbass
Sat May 02, 2020 10:09 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

Do the TTSH kits use mica or polystyrene for the 680p and .015u timing caps? If polystyrene is involved, it may have been damaged during soldering. Less likely for other fim caps, but still possible. Synthcube kit includes styrenes for the 680p on the 4027-1 and C0Gs for the 15n caps on the VCO sec...
by fuzzbass
Sat May 02, 2020 10:03 pm
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1917
Views: 260130

Re: Mini-Modules : Minimoog DIY clone on its way.

sduck wrote:
Sat May 02, 2020 9:50 pm
Do you remember offhand which one is the noise transistor? I don't have the schematic - don't know if it's posted in this thread anywhere, I haven't read the whole thing yet.
Q86
by fuzzbass
Sat May 02, 2020 7:53 am
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

I don't know what is going on, but this is not normal. They are never going to have a perfect +5V offset, but two volts is a huge error. Are you sure both rails V+ and V- are 15.00? Yes they are exactly at -15v and 15v. The led rails are also at -15.50 and 15.50v. I am running the altitude linear p...
by fuzzbass
Fri May 01, 2020 12:54 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

Sorry for the thread highjack, this is a question regarding v3 but likely applies to v4 also. I finally have a working 4012 filter after Patrick sent me a V4 version! I am pretty convinced there was something wrong with my v3 pcb. Maybe a manufacturing error? :despair: Anyway on to my question. Whi...
by fuzzbass
Thu Apr 30, 2020 3:28 pm
Forum: Music Tech DIY
Topic: Changing voltage transformer
Replies: 5
Views: 161

Re: Changing voltage transformer

Roland has always been oriented toward building for export. I would be surprised if the transformer did not already have a 220v primary connection. I recently acquired a JD990 that was built a few years after the SH02, and it took me about five minutes to change the input from 220 to 110v. Terminati...
by fuzzbass
Thu Apr 30, 2020 3:17 pm
Forum: Music Tech DIY
Topic: Mini-Modules : Minimoog DIY clone on its way.
Replies: 1917
Views: 260130

Re: Mini-Modules : Minimoog DIY clone on its way.

That is such a great story about your dad, sduck. Tips for builders of this project: 1. Take apart a DIP socket and make a little three pin socket for the noise transistor. You will probably go through a few until you find one that generates the right output level. 2. Don't pull your hair out trying...
by fuzzbass
Wed Apr 29, 2020 9:47 am
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: PSU problem

Dear Members, I started the power-check and I measured +13.75 volts on V+ pin on the PSU sub-board (all the others were fine). I can't achieve higher volts while adjusting the trimmer. What could be the problem? Please help! Disconnect the main board. You should see ~ +15.75 volts on the +15.00 pin...
by fuzzbass
Mon Apr 27, 2020 11:45 am
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

New V4 Bug : Signal traces transiting under some jacks can become shorted to the jack’s ground connection via the jack enclosure. This problem affects 19 of the jacks. Before adding the front panel and Shapers Mod to my TTSH I ran through the calibration steps and everything looked good. I then add...
by fuzzbass
Mon Apr 27, 2020 8:54 am
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

Got my v4 finished up today and started calibration. I got mine recently from a friend about 80% built and finished the rest. Everything calibrates and works except for the filter(s). Seeing some weird behavior with both. On the 4012 the signal passes without filtering and the frequency controls do...
by fuzzbass
Sat Apr 25, 2020 12:31 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

New V4 Bug : Signal traces transiting under some jacks can become shorted to the jack’s ground connection via the jack enclosure. This problem affects 19 of the jacks. A further explanation, the locations of these jacks, and suggested fixes are in the new version of the build guide I posted today. ...
by fuzzbass
Sat Apr 25, 2020 12:26 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: PSU problem

Hi, when I did a power-up check, I measured +- 16.75 volts on the pins marked +.15 volts (it is marked 15 V although I should measure app. 12.75 V according to the build guide). I think everything is OK with the components, I double checked polarity etc. What should be the problem? Probably fine, b...
by fuzzbass
Thu Apr 23, 2020 11:13 am
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread - Electronic Switch Mod

I was testing the sub-oscillator capability of the externally controlled electronic switch modification and was expecting to see a square wave, but I'm seeing something a little different. I followed the signal connections in FuzzBass' build guide and set Osc1 to about 90hz. It improves a little at...
by fuzzbass
Tue Apr 07, 2020 5:20 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

There is a lot of snobbery, especially with the KARP starting to show its face. When those who own the original came along and heard the TTSH, they said it sounds different and not so good. My take on that is it's confirmation bias and snobbery. There are no original APR2600s that will be the same....
by fuzzbass
Sun Apr 05, 2020 11:14 am
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

In the build guide (page 5) it calls for 6 matched pairs of 2N3906 – RMx2, VCAx2, 4012x1, 4072x1. On the 4012, is it safe to assume it's the two that are facing that should be matched? Also, should those be thermally coupled? Thanks, Nick Nick, this is covered in the current build guide, page 4: "F...
by fuzzbass
Wed Apr 01, 2020 11:38 am
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

that is really lovely,,, perhaps if you and fuzzbass are ok with the idea we could help make some panels and offer them with the cases... I'd be happy with that at least. I'm playing with the fpe software this week to create the mechanical drawing. Another member on here has offered to help me with...
by fuzzbass
Tue Mar 24, 2020 5:03 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

By the way , don’t know about anyone else but in my case, the square wave output from the TL071 On the shapers board has some pretty severe over/undershoot and ringing that is clearly audible. This is usually caused by the input impedance being mismatched with the impedance of the feedback circuit....
by fuzzbass
Thu Mar 19, 2020 3:30 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

My solution for the shapers. I have built it into a stand alone box. I used a power coated Hammond 1590BBBK. Almost a perfect match for the v4 panel Its powered just like a stomp box. I used a meanwell DCW03A-15 +/- 15v supply internally. Next iteration will be to improve the layout and get some gr...
by fuzzbass
Wed Mar 18, 2020 3:33 pm
Forum: Music Tech DIY
Topic: [AVAILABLE] TTSH V4 Build Thread
Replies: 911
Views: 50998

Re: [AVAILABLE] TTSH V4 Build Thread

I just ordered a VCO shapers kit - Will be fun to have all of those oscillator shapes running around. I'm a bit anxious about drilling the panel - not sure yet what I'm going to do about that. My Moog Voyager has that breakout module through a DB-25 cable, wonder if I could do something similar. So...
by fuzzbass
Sat Mar 14, 2020 11:42 am
Forum: Music Tech DIY
Topic: The unlikely capacitor
Replies: 3
Views: 409

Re: The unlikely capacitor

Is your house built on the site of an old Native American burial mound?

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