Davo
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Posts posted by Davo
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I'd love to see exactly what to do to create a chassis like this. I'd like to do something like that for my fatman reimagining project.
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About the "connected to one MIDI port" thing. Suppose I have an MBFM whos PIC ID is 0x00. Then I have an MBSEQ also with a PIC ID of 0x00 plugged into the MBFM's OUT port. Is this permitted? Or does the restriction apply only to devices that have multiple cores inside them?
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I don't know about the Waldorf Pulse, but I've found that http://www.sescom.com/ and http://www.par-metal.com/ are decent sources of rack chassis. See also http://www.midibox.org/forum/index.php?topic=10255.msg77307
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I got a reply from Scott Lee of Paia and this is what he had to say:
We have had to take these off the product list. The metalwork is now
out-sourced and the sales of these didn't justify us keeping them. I
have seen rack-chassis enclosures at Sescom, linked below:
I've also been told by other midiboxers that Par-Metal at http://www.par-metal.com/ is also an excellent source of rackmount cases. This change may be for the better because Paia's chassis required a lot of fiddling around to get a passable result. In particular, they cannot be supported only by the rack handles. You need to drill the front panel at one or two points in the bottom middle to provide rigidity.
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Unfortunately those are racks, not rackmount project boxes.
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I was on the Paia website at http://www.paia.com/ intending to order some rack chassis for some MBFM tinkering when I found that they don't seem to be selling them anymore. >:( If you go here: http://www.paia.com/products.asp?cat=24, you're told that nothing is in that category. Rackmount cases I find from other manufacturers are serious overkill and much more expensive than the ones Paia offered. True, you have to mark and drill these yourself, but DIY is the essence of what Paia's stuff has been for all these years.
I'm sure that there are some people who have used Paia rack chassis before. Can you think of an alternative source for them?
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Erm... I don't know how I managed to miss that. ???
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there is a passive mix out, J70. but pretty low level output there...
you can read about it here: http://www.midibox.org/dokuwiki/wilba_mb_6582
(currently the last item on the page)
J70 puzzles me because it doesn't appear to be connected to any other sids besides the pair on Core1. Go ahead, check it.
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Rather than just changing the front panel, consider modifying (simplifying?) the control surface design. You're stuck with 2x40 display but there's no reason you can't tweak the "matrix" to suit a smaller panel.
That's the idea. I'm thinking of scooting the LCD up a bit, then the buttons below the LCD a bit closer, then move the rotary encoders below them. The master rotary stays where it is now. The blue buttons on the far left would get put into a 2x2 square. The matrix might be okay where it is.
I prefer this rackmounted because this sort of synth isn't really the kind you frob knobs on while playing. I love doing that with analogues. A big problem I've found is where to get decent rackmount chassis at decent prices. I've been experimenting with the rackmount chassis that Paia sells. They're good and sturdy, but they're not ready to take front panels. If you don't plan out things well in advance, you'll make a mess. I eventually had good results when putting one on my Fatman. My attempt a year or so ago to build one for an MBFM yielded something resembling poo. I'll order a new one or two sometime soon. I'll also make sure to go to the bolt shop BEFORE I start cutting or drilling. You can only get so far with bolting extruded aluminum angles to everything. If I plan this right, all I'll need will be small L-brackets to mate with the front panel. I don't think it would be a good idea to use JB Weld here.
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This new group buy makes me think, "okay, now how about MBFM front panels?". Personally, I want a FPE-style engraved one precisely like TK's. However, it seems that this design wastes a lot of space. Let's try to come up with a 1U front MBFM front panel that includes all the functionality of TK's.
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Hey t_xen, that is a nice housing. I can imagine someone walking around with it. ;D
I can imagine the Boston police department going into caniption fits over it.
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Something just occurred to me. Shouldn't there be a transistor guarding the audio output of this board? Maybe I'm just being paranoid, but it's cheap insurance.
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Interesting. It looks like this foil design is especially friendly to home CNC fabbing.
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Hmm... Anyone know if this thing is available in the US or from a website written in English?
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Just arrived. From this .au seller. Said he had four more, so if you're interested, keep an eye on his auctions.
Or PM me
It looks like a telephone switchboard. What are your plans for it?
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Just now I created a new schematic symbol for the POKEY and am trying to come up with a board design. See my other symbols and such at http://www.gedasymbols.org/user/david_griffith/
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With machined-pin sockets, you have a bit of access to the topside of the pin, so you can do double-sided boards without too much trouble.
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It looks like this design already allows for this, but it would be nice to explicitly make sure 90-degree headers can be used.
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Give him a break! I've done the same sort of thing. Testing and packing stuff takes a long time. My sympathies are with you, Wilba. Thanks! :)
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When ordering parts for an AOUT v1, I accidentally ordered surface-mount opamps. ::) So I have a pair of SOIC-packaged TL074 opamps that I won't use any time soon. I'll send these out free to anyone (in US or not) who wants them since they weigh no more than a sheet of paper.
They're taken. Thanks!
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Just thought I'd show off my mb6582 in progress. I still need to get some stuff from Smash and that should be it.
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I took a closer look at mine and see the same sort of bad gaps in the envelope section. On one of the front panels I got, there was a nasty smear at the bottom left. That one I've already packed up to have redone. I'm wondering if I should have the other redone too.
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Okay, I'm now soldering R70 through R77. You said previously that these are part of a passive mixer. R70 and R71 do indeed connect to J70. But I can't seem to figure out where R72 through R77 connect to besides the SID outputs.
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1. Your instructions state that R6 for cores 2, 3, and 4 are not needed. What does R6 on core 1 do? Am I hurting anything by soldering in those resistors anyway?
2. What part number do you recommend for the trimpots?
rack/desktop seq case
in Design Concepts
Posted
Rather than bending the sides, why not simply use L-brackets? Yeah, you'll need more nuts and bolts, but it'll be simpler to fabricate.