Search found 104 matches

by glubsch
Sun Aug 19, 2018 9:53 am
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

I can see myself running into problems with the recessed pots, as I always use T-18 pots and knobs, I don't like the offcentre turning circle of the set screw type, plus they cost more for the knobs due to having brass inserts, so I bought a few thousand T-18 knobs and pots of every value and size ...
by glubsch
Sat Aug 18, 2018 1:20 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

I have heavy thin tipped needle nose pliers that would do these in a pinch Of course I have a 3D printer so it's a non-issue BTW amazing project! Count me in as interested Thanks for your comment. I have a similar pliers though yours might be thinner at the tips than mine. I used them before I had ...
by glubsch
Fri Aug 17, 2018 7:48 am
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

Plus, people will complain no matter what is done... :) Yes it's true , just look at me :mrgreen: :mrgreen: :mrgreen: No worries. I don't see this as a complaint at all. If I get input on what can be improved, I'll certainly consider it. One thing I've learned though in the few weeks that I've been...
by glubsch
Thu Aug 16, 2018 11:24 am
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

This is some top notch documentation :tu: Thanks for the nice feedback. What tool are you using for tightening those nuts? In the picture looks like there is no enough space to use a socket wrench :hmm: Do you have an estimated date when the project will be available? and BTW amazing work! Check ou...
by glubsch
Wed Aug 15, 2018 3:06 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

********************** *** BOM now available *** ********************** Alright, there are now two documents available: 1) A PDF that contains the complete assembly tables and the BOM. 2) An Excel spreadsheet that I've built up over the last couple of years and that I've just updated with the lates...
by glubsch
Sat Aug 11, 2018 2:20 am
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

The 18x CD4053 on the list of ICs should have given it away yeah, that and the large "PWM" on the silkscreen!! ive been looking into PWM multipliers for a while now, and am suprised i dont see more of them in synth projects. what was the noise floor on the PWM version versus the LM13700? and did yo...
by glubsch
Sat Aug 11, 2018 1:45 am
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

I always dreamed of getting a fully blown analogue vocoder. Here is the one that is do-able. Not spending a huge amt of money in getting the expensive THAT chips. Yes, these are the only ICs that are a bit more expensive than the others but there are only two of them and they are easy to find. In f...
by glubsch
Fri Aug 10, 2018 3:55 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

Awesome work OP. Did you consider making a modular design where individual channels could be added/removed? It may be have been feasible without the the controls on the bottom I thought about it at first but found it too cumbersome to come up with a reasonable design. That was more than 2 years ago...
by glubsch
Fri Aug 10, 2018 3:36 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

Below is the updated front panel design based on dingebre's FPD template. I still need some help though. The screw holes are placed for the panel to fit the Slim Line 3U Case . They have a center-to-center spacing of 105 mm. The handles that are supposed to fit are available here . Can someone tell ...
by glubsch
Fri Aug 10, 2018 2:42 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

glubsch - first off, great work on this. it looks like years have gone into this. ive been following the thread, and noticed that there were not enough standard VCA chips in your BOM for 18 channels. it looks like youre doing a PWM multiplier for the VCA? if you have time/inclination, id love to he...
by glubsch
Thu Aug 09, 2018 5:13 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

I guess the handles need the size that match the holes for enclosure. There's no need for extra screw holes.
by glubsch
Thu Aug 09, 2018 5:07 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

I'm currently on travel, hence my late reply. I mentioned in an earlier post that I needed some help with the dimensions. dingebre , your FPD is of great help. Thanks a lot. The panel I prepared was with the holes for the Schroff handles but not with the elongated holes for rack mounting purposes. I...
by glubsch
Tue Aug 07, 2018 2:53 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

OK, fellow wigglers, here's a new teaser. This is the complete list of semiconductor devices (except for the LEDs) used in the vocoder. It's a direct excerpt from the BOM. http://vocoder.hoerold.com/Misc/VoIS_stereo_semiconductors.png I've spent some time over the weekend to create a general overvie...
by glubsch
Mon Aug 06, 2018 2:15 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

A fellow wiggler gave me the hint that the vertical text on the left ("18-Channel Analog Stereo Vocoder and Formant System") may be in the way of the screw holes for those of you who want to place them at a different position. Who'd actually be interested in NOT using the suggested rack? I'm trying ...
by glubsch
Sun Aug 05, 2018 4:53 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

Thalassa, what’s the temperature right now in Spain?
by glubsch
Sun Aug 05, 2018 4:21 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

OK, I see more posts have come up in the meantime while I was preparing my previous post. To answer them all: yes, my current power supply concept uses a toroidal transformer inside the rack, followed by a linear PSU based on the MIC29300-12WT and Schottky diodes (combined with some beefy electrolyt...
by glubsch
Sun Aug 05, 2018 4:07 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

I've just looked it up and I don't see how this could be an economical solution. The DC/DC converter would have to be supplied by an external power supply providing DC voltage, right? At a power rating of ~40 W, the DC/DC converter alone is about 50€. I am looking at the JCK4012D12. It appears to b...
by glubsch
Sun Aug 05, 2018 2:38 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

And what about using an external psu and an internal DC / DC converter ? Can you give me a hint what this would actually look like? A specific example? Edited to say: I've just looked it up and I don't see how this could be an economical solution. The DC/DC converter would have to be supplied by an...
by glubsch
Sun Aug 05, 2018 1:45 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

Back on topic: would wigglers expect using their own power supplies? The vocoder requires +/-12 V at about 1.2 A each polarity. To give it some reserve, I'd suggest 1.5 A per polarity at a minimum. I've designed a supply that dissipates surprisingly little heat if a +/-12 V transformer is used. I'm ...
by glubsch
Sat Aug 04, 2018 1:23 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

needspeed wrote:i am in for sure after building 7 Deckards Dreams I need a change of pace Hee hee hee...... Steve
Uh, ok... I had to look this up as I didn't know what Deckard's Dream actually is. You must have some special permissions or something as they are on preorder, right?
by glubsch
Sat Aug 04, 2018 12:17 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

Looks great indeed! But I can't figure out how the pots are attached to the frontplate, or aren't they? Take another close look at the picture above, it's the nut that comes with the pot. As a regular wrench will not fit in the whole, I had someone create a custom socket with a 3D printer. I will i...
by glubsch
Sat Aug 04, 2018 7:44 am
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

I am in the middle of preparing a document with general information about the BOM and sourcing parts. While preparing, I shot this photo. It shows you the recessed placement of the pots in the front panel. As you can see, this helps placing the Davies knobs very close to the surface of the front pan...
by glubsch
Thu Aug 02, 2018 2:28 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

HighLordFixer I haven't checked the CV in/outs from the Bode/Moog vocoder series. You can get that information from Technical Details section of the brochure. In essence: the CV controls for the internal excitation sections are 1 V/oct, allowing you to control from 0...10 V (though using the associ...
by glubsch
Thu Aug 02, 2018 12:57 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

Front panel design

So here's the front panel, adjusted for size (width 483 mm, height 132.5 mm, depth 3 mm). It contains screw holes that fit the rack from Hifi2000 ("Slim Line 03/230 3U") and screw holes for handles from Schroff (catalog number 20860-258). This panel and the PCBs would be part of the discounted pre-r...
by glubsch
Thu Aug 02, 2018 12:36 pm
Forum: Music Tech DIY
Topic: 18-channel DIY Stereo Analog Vocoder
Replies: 281
Views: 33981

First off, thanks for all the kudos. All the feedback through this forum and email is very encouraging. Grooverman, The first twelve wigglers would get a discount. After that, I'd sell the PCB+front panel combo at a regular price. Instead of calling it limited run, let me use your wording and call i...

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