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Please join us at NAMM! MW will be hosting a booth and we would like to invite all manufacturers small and large to join us. We are delighted to support this scene and help provide booth space for anyone who wants to show off their gear and partake in the company of the best group of folks on earth. Please email [email protected] to discuss details. Hope to see you there!



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quad slew
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Author quad slew
Navs
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PostPosted: Wed Jul 07, 2010 4:34 am    Post subject: quad slew Reply with quote Add User to Ignore List

Repurposing an unused A-180 multiple as a quad passive slew:

http://navsmodularlab.blogspot.com/2010/07/diy-quad-slew.html

smile

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dude
fuck yeah!


Joined: 05 Jul 2009
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PostPosted: Wed Jul 07, 2010 4:36 am    Post subject: Reply with quote Add User to Ignore List

more slew!
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en.
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Joined: 25 Apr 2010
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PostPosted: Wed Jul 07, 2010 5:27 am    Post subject: Reply with quote Add User to Ignore List

uhuh! thank you navs and fonitronik!
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Smooth Operator
Common Wiggler


Joined: 15 Mar 2010
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Location: Germany

PostPosted: Wed Jul 07, 2010 6:28 am    Post subject: Reply with quote Add User to Ignore List

Great idea! thumbs up
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Monobass
thonk.co.uk


Joined: 29 May 2009
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Location: Brighton, UK

PostPosted: Wed Jul 07, 2010 7:14 am    Post subject: Reply with quote Add User to Ignore List

brilliant.. am I right in thinking the A180 has no other components, purely ganged connectors? If so then this is a very simple DIY project without an A-180 also.
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fonik
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Joined: 19 Sep 2008
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PostPosted: Wed Jul 07, 2010 7:57 am    Post subject: Reply with quote Add User to Ignore List

absolutely, monobass.

it is actually nothing but a fixed lopass filter. there are quite a few passive module designs you could easily build as a start. what about a switch to select from different cap values? this would give you a passive 6db lopass with selectable cutoff (has been made by moog in the past millenium wink - see below). or what about fixed hipass, attenuators, multiples, switches (selectors)... all you need is a cheap soldering iron from the hardware store, believe me, it is sufficient for a start.

anyways, navs module will be very useful for everyone who frequently uses gates for VCAs...


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stk
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PostPosted: Wed Jul 07, 2010 9:26 am    Post subject: Reply with quote Add User to Ignore List

Could this be modified to use a pot for variable cutoff/slew?
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fonik
Super Deluxe Wiggler


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PostPosted: Wed Jul 07, 2010 9:33 am    Post subject: Reply with quote Add User to Ignore List

no, actually not.
by replacing the resistor with a pot you would not just change the slew rate but also change the level. in other words, the slower the slew the lower the signal level. for your ears the lowering of the level would simply whitewash the effect of changing the slew.
to prevent this you would have to use opamps as buffers, thus having an active module.

as i mentioned above you could use a switch for selecting capacitors of different values (as seen on the moog schematic above). the larger the cap, the slower the slew...

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www.fonitronik.de
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Last edited by fonik on Wed Jul 07, 2010 9:36 am; edited 1 time in total
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haesslich
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Joined: 02 Mar 2010
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PostPosted: Wed Jul 07, 2010 9:52 am    Post subject: Reply with quote Add User to Ignore List

with a 4051 and a counter you could replace the switch by a trigger signal... okay, again this would be an active module ;-)
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stk
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PostPosted: Wed Jul 07, 2010 9:58 am    Post subject: Reply with quote Add User to Ignore List

Thanks for the info, fonik.
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