DIY summing bus
- tablebeast
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DIY summing bus
I want to build my own summing bus. It needs to have 16 inputs with each switchable from stereo to mono. Anyone have any schematics for something like this? I guess the Roll Music Folcrom would be the closest thing to what I want to build, how exactly does that thing go together? Any ideas on this idea of building your own summing bus, any links to threads on other boards, etc.
Jesse
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- Milkmansound
- george martin
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my god there are so many posts about this on groupdiy.com your head will explode.
the NYdave schematic looks simple and good - just google that.
analog summing is a no brainer - some quick math for the resistors, and the rest is just parts and a case. And something for makeup gain.
the NYdave schematic looks simple and good - just google that.
analog summing is a no brainer - some quick math for the resistors, and the rest is just parts and a case. And something for makeup gain.
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do you mean this: http://groupdiy.twin-x.com/albums/userp ... etwork.pdf
- Milkmansound
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thats precisely the one.
If it were me, I would lose the switches though cause they just add money - and assign the inputs to either left or right.
And make sure the inputs normal when they are not in use.
there is also a summing bus based on the hamptone pre in an old tapeop - somewhere online there is a scan of this. Its essentially the same thing, but with the makeup gain as part of the design based off of the Jfet design Scott used in his preamp.
If it were me, I would lose the switches though cause they just add money - and assign the inputs to either left or right.
And make sure the inputs normal when they are not in use.
there is also a summing bus based on the hamptone pre in an old tapeop - somewhere online there is a scan of this. Its essentially the same thing, but with the makeup gain as part of the design based off of the Jfet design Scott used in his preamp.
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- NewYorkDave
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Well, that's exactly why the level control, mute and assign switches are labeled OPTIONAL on that schematic. One man's "waste of time and money" is another man's damn-handy feature.
Here's a simpler rendition with just pushbutton on/off switches for left and right.
http://groupdiy.twin-x.com/albums/userp ... cedmxr.pdf
Here's a simpler rendition with just pushbutton on/off switches for left and right.
http://groupdiy.twin-x.com/albums/userp ... cedmxr.pdf
It is, when someone gives you a circuit and resistor values, or tells you the formula to use to figure out what values to plug in. But there was some brainpower involved somewhere along the line, don't ya think?analog summing is a no brainer
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dave i meant no disrespect.
your design is much appreciated. thank you for making available. i guess i could have worded that better. maybe something like "depending on how your going to be using it, you may not need the volume or mute controls, which would save you time and money".
i'll go crawl in the corner now.
your design is much appreciated. thank you for making available. i guess i could have worded that better. maybe something like "depending on how your going to be using it, you may not need the volume or mute controls, which would save you time and money".
i'll go crawl in the corner now.
- Milkmansound
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dave, I meant its a no brainer because of your schematic... obviously, without your hard work and time and energy there would be much less DIY in the world. Thanks for putting that thing online in the first place so hacks like us can build something cool
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ok good - I do not want to make enemies with you!
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hamptone summing box
i'd be really interested in this if anyone has more info...Milkmansound wrote:there is also a summing bus based on the hamptone pre in an old tapeop - somewhere online there is a scan of this. Its essentially the same thing, but with the makeup gain as part of the design based off of the Jfet design Scott used in his preamp.
seems like it would be relatively easy to make a kit for a summing bus with jfet drivers, with as much hype as analog summing is getting these days i hope seventh circle or hamptone are putting something together a novice like me could build...
sounds like more fun than just buying a folcrom
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WWIV Recording Studio Austin, TX
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- ulriggribbons
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Are you referring to the JFet mic pre article? There was a simple mix bus diagram showing line input feeding a 10K pot feeding the JFET gain block.
Second page at the bottom.
I'd post a link, but I know the page is on the group diy site, just there's some db corruption keeping the search feature from workin at the moment.
hit the groupdiy.com site, and search for:
hamptone and jfet
Should get you there.
Regards
ju
Second page at the bottom.
I'd post a link, but I know the page is on the group diy site, just there's some db corruption keeping the search feature from workin at the moment.
hit the groupdiy.com site, and search for:
hamptone and jfet
Should get you there.
Regards
ju
- ulriggribbons
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Ok, The Lab is back online, the link is:
http://www.prodigy-pro.com/forum/viewtopic.php?t=1504
Regards
ju
http://www.prodigy-pro.com/forum/viewtopic.php?t=1504
Regards
ju
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