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  Topic: Simple VCA (DC version) is an inverting amplifier?
Gypsum Fantastic

Replies: 2
Views: 4318

Post Posted: Tue Jun 26, 2018 1:52 pm    Subject: Simple VCA (DC version) is an inverting amplifier?
Forum:  DIY Hardware and Software » YuSynth
Hi Everyone

I've been building my Yusynth for 18 months now. I love it. It's amazing.

It's still quite a small system comparatively speaking: 2xVCO, 2xEG, dual slew, LFO2, Moog filter, Simple VC ...
  Topic: Help troubleshooting Dual Gate Slew
Gypsum Fantastic

Replies: 6
Views: 8190

Post Posted: Thu Jun 14, 2018 1:00 pm    Subject: Help troubleshooting Dual Gate Slew
Forum:  DIY Hardware and Software » YuSynth
OK so I had a bit more time to troubleshoot the problem.

I'm slightly embarrassed to say that I think the module was working the way it's supposed to work all along.

Even with the slew direction ...
  Topic: Help troubleshooting Dual Gate Slew
Gypsum Fantastic

Replies: 6
Views: 8190

Post Posted: Tue May 22, 2018 11:51 pm    Subject: Help troubleshooting Dual Gate Slew
Forum:  DIY Hardware and Software » YuSynth
could you provide a link to the refering schematic?

Thanks for the reply.

Sure. Here’s Yves’ page about it in general http://yusynth.net/Modular/EN/DUALSLEW/index.html

This is the schema ...
  Topic: Help troubleshooting Dual Gate Slew
Gypsum Fantastic

Replies: 6
Views: 8190

Post Posted: Tue May 22, 2018 12:44 pm    Subject: Re: Help troubleshooting Dual Gate Slew
Forum:  DIY Hardware and Software » YuSynth
I'm really very sorry to resurrect such an old thread, but this part of your post (below) is an exact description of the problem I'm seeing. I think my dual slew works fine apart from this one issue. ...
  Topic: Dual Gated Slew - error in PCB layout
Gypsum Fantastic

Replies: 2
Views: 3276

Post Posted: Thu Mar 01, 2018 11:02 am    Subject: Dual Gated Slew - error in PCB layout
Subject description: Or maybe I just don't understand what's going on here
Forum:  DIY Hardware and Software » YuSynth
This is a mistake, or I just don't understand something:

I'm just about to start building my dual slew and I noticed something on the PCB layout. R2 is completely shorted by PCB traces.

Attache ...
  Topic: VCO with metal can LM394?
Gypsum Fantastic

Replies: 2
Views: 3990

Post Posted: Sat Apr 22, 2017 2:26 pm    Subject: VCO with metal can LM394?
Forum:  DIY Hardware and Software » YuSynth
Great, thanks very much for your help.
  Topic: VCO with metal can LM394?
Gypsum Fantastic

Replies: 2
Views: 3990

Post Posted: Sat Apr 22, 2017 1:11 am    Subject: VCO with metal can LM394?
Subject description: Anyone try this?
Forum:  DIY Hardware and Software » YuSynth
Hi Everyone

I'm still quite near the start of my DIY yusynth adventure.So far I've got a Minimoog VCF built and working. Next in line is a pair of VCOs.

I sent away for some LM394s but they're t ...
 
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