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probablyjoel
Joined: Aug 31, 2008 Posts: 11 Location: Seattle
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Posted: Sun Dec 07, 2008 3:48 pm Post subject:
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Thanks so much! This will really help, and I'm really excited to try it out! |
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probablyjoel
Joined: Aug 31, 2008 Posts: 11 Location: Seattle
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Posted: Sun Dec 07, 2008 3:54 pm Post subject:
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I am assuming that the manual control is the power source to the V+... is that right? |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Tue Dec 30, 2008 2:49 am Post subject:
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Shall we use 1N5224 2.8V Zener diode or 1N5233 6V, as stated in schematic ?
Thank you. |
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neandrewthal
Joined: May 11, 2007 Posts: 672 Location: Canada
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Posted: Tue Dec 30, 2008 10:31 am Post subject:
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I used 6v and it works fine. _________________ " I went through quite a few trannies til I found one I liked" - Wild Zebra |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Tue Dec 30, 2008 11:09 am Post subject:
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Use the 6V zener. I need to update my parts layout. Sorry for the confusion. |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Fri Feb 20, 2009 4:24 pm Post subject:
Re: Buchla 218 VC-able Portamento - Works! |
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vtl5c3 wrote: | I may have to do a bit of fine tuning... if nothing else I will try smaller cap values, since it's pretty easy to get way too much portamento going. |
Can you get on/off effect with 5V steps from a sequencer ?
Buchla CV are 0-15V ?
Cheers,
ff |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Mon Mar 02, 2009 2:58 pm Post subject:
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You can get on/off effect with 12V steps from an CGS step sequencer !
Slew pot fully ccw.
I've added a pot on cv input, and put 33kR in parallel with 68k input resistor to have a cool range curve.
But I have to invert the incoming cv signal because positive voltages reduce slew fx...
I've measured 0,002v offset at the worst potentiometer position !
I use it on v/o
Two midi transposed klee voices ; you can hear 218 slew on the higher one. oakley vco + hot input 291 and a lot of 292.
3 minutes, and maybe not the better sample as an illustration, but,
That rocks !
http://sslstudiodesign.free.fr/218/ |
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LektroiD
Joined: Aug 23, 2008 Posts: 1018 Location: Scottish Borders
Audio files: 2
G2 patch files: 2
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Posted: Fri Sep 17, 2010 11:38 am Post subject:
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Is there anything I can replace the 1N5233 with? _________________ LektroiD |
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neandrewthal
Joined: May 11, 2007 Posts: 672 Location: Canada
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Posted: Thu Sep 23, 2010 10:54 pm Post subject:
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I`m sure any 6V zener (or close enough) would work. _________________ " I went through quite a few trannies til I found one I liked" - Wild Zebra |
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RSFC
Joined: Sep 02, 2010 Posts: 63 Location: space lab
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Posted: Fri Feb 25, 2011 3:40 pm Post subject:
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Curious if these could be used to make a DIY pseudo buchla 255? |
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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Fri Feb 25, 2011 4:54 pm Post subject:
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no, I'm sorry, that would break every DIY rule in the book. you can't use this vclag and an attentuverter to mimick the functionality of a 255. |
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RSFC
Joined: Sep 02, 2010 Posts: 63 Location: space lab
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Posted: Fri Feb 25, 2011 5:50 pm Post subject:
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hahaha, no I wasn't asking for permission. I was just curious if my thoughts were correct, which it sounds like they are. Sometimes buchla descriptions of their own modules are cryptic. I wanted to make sure I was thinking about it in the right way. |
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bubzy
Joined: Oct 27, 2010 Posts: 594 Location: United Kingdom
Audio files: 64
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Posted: Sat Feb 26, 2011 10:39 am Post subject:
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ericcoleridge wrote: | no, I'm sorry, that would break every DIY rule in the book. you can't use this vclag and an attentuverter to mimick the functionality of a 255. |
what book?
surely theres no problem if the schematics are freely available.
incidentally i have used a 6.2v zener and it works ok. |
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roman_f
Joined: Jul 03, 2007 Posts: 63 Location: Moscow
Audio files: 1
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Posted: Wed Mar 21, 2012 5:16 pm Post subject:
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i have it working but the only issue is that the working range of the pot is maybe 7-10. before 7 - nothing happens, then it starts slewing
did anyone experience that? should i put the negative rail instead of a 0 on the CCW lug? |
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