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 Forum index » DIY Hardware and Software » Thomas Henry designs
An Analog Synthesizer for the 21st Century
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mrand



Joined: Mar 30, 2014
Posts: 56
Location: Yukon and London Ontario

PostPosted: Thu Aug 18, 2016 10:24 pm    Post subject: Reply with quote  Mark this post and the followings unread

I've been using the diode between gnd and v- protection outlined there, but I definately am paranoid that I've messed it up and fried all three 2164s as I swapped them in and out while trying to debug!

I should bb a simple expo vca first to see if i can get that working...

I just realized you're the guy who produced those 808 stripboard layouts, right? Heh, glad youre helping me here cus it's your fault I got into building circuits in the first place! That highhat was the first circuit i made that actually did something useful. Gave me the confidence to keep trying/learning.
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elmegil



Joined: Mar 20, 2012
Posts: 2108
Location: Chicago
Audio files: 16

PostPosted: Thu Aug 18, 2016 10:29 pm    Post subject: Reply with quote  Mark this post and the followings unread

Nope, that was actually -minus-, I just spent a lot of time blabbing with him about them Smile
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mrand



Joined: Mar 30, 2014
Posts: 56
Location: Yukon and London Ontario

PostPosted: Thu Aug 18, 2016 10:34 pm    Post subject: Reply with quote  Mark this post and the followings unread

Guess I remember your "face" from that thread.
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mrand



Joined: Mar 30, 2014
Posts: 56
Location: Yukon and London Ontario

PostPosted: Sat Aug 20, 2016 10:23 pm    Post subject: Reply with quote  Mark this post and the followings unread

Got it all working now, with VCq as well. I know others were having problems with getting self oscillation, but mine seems fine in that regard. I can't remember if it self oscillated before in inserted the VCA into the resonance path though! Could that have something to do with it? With ceramic caps, it oscillated, but not super consistently. Using polystyrenes improved it.
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fonik



Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23

PostPosted: Fri Mar 10, 2017 4:10 pm    Post subject: Reply with quote  Mark this post and the followings unread

Meanwhile i got the go from Thomas Henry to publish PCBs for the VCF/VCA. THey are available already from Thonk and Synthcube.
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matthias
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