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by Jonachi
Tue Jul 28, 2020 3:15 am
Forum: Music Tech DIY
Topic: Help me develop a bandpass gate!
Replies: 14
Views: 510

Re: Help me develop a bandpass gate!

Thanks. Tried a VCA after my qpas (in mono) last night and it sounded much better than VCA before filter. So I'm going to try this approuch. State variable filter with bandpass only straight into a VCA sharing the same CV. Should be fun!
by Jonachi
Mon Jul 27, 2020 11:26 am
Forum: Music Tech DIY
Topic: Help me develop a bandpass gate!
Replies: 14
Views: 510

Re: Help me develop a bandpass gate!

Thank you Jerk best and most informative answer yet.

Filter followed by vca is what I will try first. And let them share the same cv in I suppose. What is the most simple vca curcuit one can find?
by Jonachi
Sun Jul 26, 2020 2:28 pm
Forum: Music Tech DIY
Topic: Help me develop a bandpass gate!
Replies: 14
Views: 510

Re: Help me develop a bandpass gate!

Doepfer beat me two it:

http://www.doepfer.de/a1011_tec.htm

Still need to develop my own thing though.
by Jonachi
Sun Jul 26, 2020 1:49 pm
Forum: Music Tech DIY
Topic: Help me develop a bandpass gate!
Replies: 14
Views: 510

Re: Help me develop a bandpass gate!

ok so in theory what I want to do is: 1. Convert this layout to vactrols, or even better LED/LDR design: https://en.wikipedia.org/wiki/Sallen%E2%80%93Key_topology#/media/File:VCVS_Filter_Bandpass_General.svg 2. And when done, convert Clee's design with it. I dont know where to begin and I've been tr...
by Jonachi
Sun Jul 26, 2020 8:33 am
Forum: Music Tech DIY
Topic: Help me develop a bandpass gate!
Replies: 14
Views: 510

Re: Help me develop a bandpass gate!

If it is I still need some seriouss help to make it happen! :hmm:
by Jonachi
Sat Jul 25, 2020 3:24 am
Forum: Music Tech DIY
Topic: Help me develop a bandpass gate!
Replies: 14
Views: 510

Re: Help me develop a bandpass gate!

Thank you! I beleive I understand what you mean, but wonder if you can be more specific?
by Jonachi
Fri Jul 24, 2020 5:38 am
Forum: Music Tech DIY
Topic: Help me develop a bandpass gate!
Replies: 14
Views: 510

Re: Help me develop a bandpass gate!

I have, but I’m doing a gate, not a filter. Or actually plan b is a vca followed by a regular bandpassfilter.
by Jonachi
Fri Jul 24, 2020 1:25 am
Forum: Music Tech DIY
Topic: Help me develop a bandpass gate!
Replies: 14
Views: 510

Help me develop a bandpass gate!

Hi there. So after 7 years of building I thought I'd try to develop my first own design ( n00b flag waved). Don't know if something like a bandpass-gate exist but I need one. It will be the first circuit in the bigger scheme at the input stages. So I've always loved Clee's VC resonant gates since it...
by Jonachi
Wed Jul 01, 2020 3:51 pm
Forum: Music Tech DIY
Topic: [Build Thread] UltraFlop-08 Sequencer
Replies: 133
Views: 13072

Re: [Build Thread] UltraFlop-08 Sequencer

Nice!
by Jonachi
Tue Jun 30, 2020 12:25 pm
Forum: Music Tech DIY
Topic: CGS514
Replies: 52
Views: 2505

Re: CGS514

Anyone know where I can buy a cgs114 board?
by Jonachi
Fri Jun 26, 2020 11:32 am
Forum: Music Tech DIY
Topic: DUSG Help!
Replies: 69
Views: 3944

Re: DUSG Help!

Found a CGS75 pcb and decided to build that one as a replacement (after spending days troubleshooting this one). Thanks for the help though, might have another look another time. Probably a broken trace or lifted pad unvisable for the human eye.
by Jonachi
Fri Jun 26, 2020 5:43 am
Forum: Your Tunes Here
Topic: Råd Kjetil Senza Testa - Арха́нгельск
Replies: 1
Views: 64

Råd Kjetil Senza Testa - Арха́нгельск

More DIY synths and test equipment than anyone can ever count on our new album.

Over here.



by Jonachi
Wed Jun 24, 2020 12:59 am
Forum: Music Tech DIY
Topic: DUSG Help!
Replies: 69
Views: 3944

Re: DUSG Help!

nope, no apprent short bwetween this leg and the +12v power supply at least.
by Jonachi
Tue Jun 23, 2020 11:34 am
Forum: Music Tech DIY
Topic: DUSG Help!
Replies: 69
Views: 3944

Re: DUSG Help!

Sorry messed up when counting the pins. Pin 6 is 0v and so is C and all resitors that are connected to it. Pin 7 however is the one that outputs 12v constantly.

Sorry for the confusion.
by Jonachi
Tue Jun 23, 2020 11:28 am
Forum: Music Tech DIY
Topic: DUSG Help!
Replies: 69
Views: 3944

Re: DUSG Help!

Input as in C on the board? Yes I use Ken’s schematic as refrence. So that’s the right Ic
by Jonachi
Tue Jun 23, 2020 8:48 am
Forum: Music Tech DIY
Topic: DUSG Help!
Replies: 69
Views: 3944

Re: DUSG Help!

Here is a picture
FE4C059A-EBEE-4610-8878-C755C3457A45.jpeg
by Jonachi
Tue Jun 23, 2020 3:46 am
Forum: Music Tech DIY
Topic: DUSG Help!
Replies: 69
Views: 3944

Re: DUSG Help!

So loong story short. Used my corona isolation days to resteror and refine some old builds. Opened up the Quad Slop (sporting 2 cgs114 pcbäs) to fix one broken channel, clumsy mistake I made many years ago, swapped all leds, installed cyckling switches etc. When putting it back together I must have ...
by Jonachi
Sat Jun 20, 2020 11:26 am
Forum: Music Tech DIY
Topic: [Shipping] - Euro Panel/Kit for Serge Resonant EQ Mk. II
Replies: 672
Views: 58095

Re: [Shipping] - Euro Panel/Kit for Serge Resonant EQ Mk. II

Dream job right there folks!
by Jonachi
Fri Jun 19, 2020 2:19 pm
Forum: Music Tech DIY
Topic: [ORDER] - Euro Panels for CLee's LPG Boards
Replies: 99
Views: 10083

Re: [ORDER] - Euro Panels for CLee's LPG Boards

Anyone know where I can find a quad panel? Or ask for a reissue? Sold mine a while ago and alreay regret it. Need to build a new one.
by Jonachi
Fri Jun 19, 2020 8:32 am
Forum: Music Tech DIY
Topic: [Build Thread] UltraFlop-08 Sequencer
Replies: 133
Views: 13072

Re: [Build Thread] UltraFlop-08 Sequencer

Also had the switch in reverse problem, even posted about it in this short thread many years ago!

Got all the mods working now too. Swell!
by Jonachi
Mon Jun 08, 2020 6:38 am
Forum: Music Tech DIY
Topic: [Build Thread] UltraFlop-08 Sequencer
Replies: 133
Views: 13072

Re: [Build Thread] UltraFlop-08 Sequencer

So after further investigation I can turn on and off channel 8, is behaving strange though, when on it outputs the same patterns s the clock output jack. must hve missed something somwhere, gate out 3 and 5 are still dead both in the or outpput as well as the individual. You can here the clock count...
by Jonachi
Mon Jun 08, 2020 5:56 am
Forum: Music Tech DIY
Topic: [Build Thread] UltraFlop-08 Sequencer
Replies: 133
Views: 13072

Re: [Build Thread] UltraFlop-08 Sequencer

Did the OR-mod and have som mixed results. All chanel indicviaul outputs work except 3 and 5 which doesn't output anything when it is time for their step (those doesn't show up at the OR output as well) and channel 8 is always hih no matter how I set the switch. I have checked for shorts etc, might ...
by Jonachi
Mon Jun 08, 2020 2:29 am
Forum: Music Tech DIY
Topic: [Build Thread] UltraFlop-08 Sequencer
Replies: 133
Views: 13072

Re: [Build Thread] UltraFlop-08 Sequencer

47k gave me 3.84v out which was not covering 4 octaves to swapped it to 56k which gave me about 4,3v. I'll leave it at that. Off to the OR mod. Thanks for all your help.
by Jonachi
Sun Jun 07, 2020 6:39 am
Forum: Music Tech DIY
Topic: [Build Thread] UltraFlop-08 Sequencer
Replies: 133
Views: 13072

Re: [Build Thread] UltraFlop-08 Sequencer

Any other mods one could consider with this one?
by Jonachi
Sun Jun 07, 2020 5:32 am
Forum: Music Tech DIY
Topic: [Build Thread] UltraFlop-08 Sequencer
Replies: 133
Views: 13072

Re: [Build Thread] UltraFlop-08 Sequencer

Thanks! Will try tomorrow!

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