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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
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Posted: Mon Nov 19, 2007 3:48 pm Post subject:
Roman Sowa's simple AD633 RingMod Subject description: PCB layouts (ready for press'n'peel blue) |
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this is what i built tonight, waiting for a front panel. layout will be uploaded soon. Roman's Site
here is a PDF with a PCB layout ready for press'n'peel blue, providing standard connectors:
http://www.modular.fonik.de/pdf/ad633rm_em.pdf
here the PCB layout i used for my module, providing footprints for cliff sockets (easy panel mount):
http://www.modular.fonik.de/pdf/ad633rm.pdf _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source Last edited by fonik on Thu Nov 22, 2007 5:00 am; edited 1 time in total |
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EdisonRex
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Joined: Mar 07, 2007 Posts: 4579 Location: London, UK
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Posted: Mon Nov 19, 2007 3:59 pm Post subject:
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okay what does it sound like?
We've been comparing RMs here the past couple of days, you know _________________ Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated.
Home,My Studio,and another view |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
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EdisonRex
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Joined: Mar 07, 2007 Posts: 4579 Location: London, UK
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Posted: Mon Nov 19, 2007 5:30 pm Post subject:
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AH! You used the 2044 filter. Lovely. I bet you can get some nice mellow tones with that on low Q, mid Fc (like I heard 3/4 of the way through) and I bet that 2044 will make an awesome gong.
That's yet another interesting circuit. Did you build it with an AD633? _________________ Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated.
Home,My Studio,and another view |
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blue hell
Site Admin
Joined: Apr 03, 2004 Posts: 24081 Location: The Netherlands, Enschede
Audio files: 278
G2 patch files: 320
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Posted: Mon Nov 19, 2007 5:37 pm Post subject:
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That's definitely RM
This looks easier than the elektor one I once built. _________________ Jan
also .. could someone please turn down the thermostat a bit.
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Tue Nov 20, 2007 2:46 am Post subject:
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EdisonRex wrote: | That's yet another interesting circuit. Did you build it with an AD633? |
yes, i did. and this IC is not cheap over here. i had to pay 10.-EUR (14.-USD)! but as jan says, it's a very simple circuit. 2 ICs, 2 caps, 13 resistors, 2 trimmers and the controlls. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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Pehr
Joined: Aug 14, 2005 Posts: 1307 Location: Björkvik, Sweden
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Fernando
Joined: Dec 30, 2006 Posts: 286 Location: Barcelona & Emporda, Spain
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Posted: Tue Nov 20, 2007 6:26 am Post subject:
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Marc Bareille's variation on Roman's circuit is very interesting
He adds a divide function, a Z input, etc |
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Serenadi
Joined: Jul 03, 2007 Posts: 89 Location: Germany
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Posted: Tue Nov 20, 2007 11:07 am Post subject:
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Fernando wrote: | Marc Bareille's variation on Roman's circuit is very interesting
He adds a divide function, a Z input, etc |
Yeah. Nice too.
In a way, I love all these circuits, but unfortunately I don't have the time to build all that stuff.
A little bit like Matthias, but he's still more busy than me.
Fernando, are you able to present a little demo of the z-variation ?
Ian's XOR is very nice too.
Somehow all the circuits produce ringmod sounds which are usable.
But in the end I prefer the real ring of Ken Stone.
It sounds a little bit more natural to me. Don't know how to describe - more bottom or so. |
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Fernando
Joined: Dec 30, 2006 Posts: 286 Location: Barcelona & Emporda, Spain
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Posted: Tue Nov 20, 2007 12:17 pm Post subject:
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Serenadi wrote: | Fernando, are you able to present a little demo of the z-variation ? |
Nope, sorry. I plan to get a couple of boards but not yet |
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Clack
Joined: Aug 08, 2005 Posts: 438 Location: Walthamstow - london
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Posted: Tue Nov 20, 2007 1:14 pm Post subject:
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Nice, quite similar to some yamaha FM sounds.
What are the OP482's about? are they specific - are they rare? _________________ Clacktronics.co.uk |
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Rykhaard
Joined: Sep 02, 2007 Posts: 1290 Location: Canada
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Posted: Wed Nov 21, 2007 8:53 am Post subject:
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Mr Clack wrote: | Nice, quite similar to some yamaha FM sounds.
What are the OP482's about? are they specific - are they rare? |
By slim chance - has anyone in the world done a new opamp comparison's chart of any kind? Bernie Hutchins had done an excellent one years ago in the Electronotes Newsletter. I've seen so many new ones from National Semiconductor, Linear Tech and Analog Devices as well as other smaller companies that my head just swirls about.
I've so far been lucky enough to stick with my old standard TL07x, TL08x and LF35x series for everything. (And of course the trusty ol LM358 for it's wonderful slowness features, in certain things. ) |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Thu Nov 22, 2007 2:12 am Post subject:
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opamp comparison would be good. with little explanations added not just the specs.
here is a PDF with my PCB layout (for cliff sockets), ready for press'n'peel blue.
http://www.modular.fonik.de/pdf/ad633rm.pdf _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Fernando
Joined: Dec 30, 2006 Posts: 286 Location: Barcelona & Emporda, Spain
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Posted: Thu Nov 22, 2007 8:13 am Post subject:
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Rykhaard wrote: |
By slim chance - has anyone in the world done a new opamp comparison's chart of any kind? |
Not what you ask but, the OP275 is a great op amp. Very good for audio and low input offset too, and not expensive for a high quality audio one |
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Rykhaard
Joined: Sep 02, 2007 Posts: 1290 Location: Canada
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Posted: Thu Nov 22, 2007 8:25 am Post subject:
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Fernando wrote: | Rykhaard wrote: |
By slim chance - has anyone in the world done a new opamp comparison's chart of any kind? |
Not what you ask but, the OP275 is a great op amp. Very good for audio and low input offset too, and not expensive for a high quality audio one |
It's slipped me for the mo', but who're the OP people?? Wasn't it Precision at one time and then AD bought them?? (Searching through the pile of hay of my ol' timer memory. LOL )
I'll check out their specs in comparison to my old standards. I recognize the part # probably, from Ian. And the wonderfully spec'd stuff he likes to use.
Edit: $2.48 Canadian at Digikey. $1.98 at 25+. I'm used to paying $0.50-0.75 a piece. Haha. At least they're not as expensive as them AD75.... D/A chips from other places, that others were talking about for the Quantizer. |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Thu Nov 22, 2007 8:30 am Post subject:
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Great. Not only p'n'p, but these work fine for the photographic method as well. If you ever have time to spare, you might want to consider doing standard layouts for the low pass gate and cv processor as well _________________ http://www.casia.org/modular/ |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Thu Nov 22, 2007 8:36 am Post subject:
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Quote: | It's slipped me for the mo', but who're the OP people?? Wasn't it Precision at one time and then AD bought them?? |
I can't find any other datasheets online other than those from AD. Maybe you mean the OPA devices from Burr-Brown? BB was acquired by TI. _________________ http://www.casia.org/modular/ |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
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Posted: Thu Nov 22, 2007 9:14 am Post subject:
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Etaoin wrote: | If you ever have time to spare, you might want to consider doing standard layouts for the low pass gate and cv processor as well |
especially the LPG will be revised! had some questions about this one... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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EdisonRex
Site Admin
Joined: Mar 07, 2007 Posts: 4579 Location: London, UK
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Posted: Thu Nov 22, 2007 1:54 pm Post subject:
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Rykhaard wrote: | Fernando wrote: | Rykhaard wrote: |
By slim chance - has anyone in the world done a new opamp comparison's chart of any kind? |
Not what you ask but, the OP275 is a great op amp. Very good for audio and low input offset too, and not expensive for a high quality audio one |
It's slipped me for the mo', but who're the OP people?? Wasn't it Precision at one time and then AD bought them?? (Searching through the pile of hay of my ol' timer memory. LOL )
I'll check out their specs in comparison to my old standards. I recognize the part # probably, from Ian. And the wonderfully spec'd stuff he likes to use.
Edit: $2.48 Canadian at Digikey. $1.98 at 25+. I'm used to paying $0.50-0.75 a piece. Haha. At least they're not as expensive as them AD75.... D/A chips from other places, that others were talking about for the Quantizer. |
Burr-Brown was the priciest and most accurate in the old days, if i remember. Then yeah, AD I think made a lot of specialist stuff. There were a lot of small boutiques that Analog Devices bought rights from.
I was a NatSemi fanboi, mostly because I could get samples from their dealer easier than I could get linear stuff out of TI. _________________ Garret: It's so retro.
EGM: What does retro mean to you?
Parker: Like, old and outdated.
Home,My Studio,and another view |
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Coriolis
Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark
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Posted: Thu Nov 22, 2007 2:20 pm Post subject:
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A bit confused about this ckt: I thought the 633 was supposed to be so good you didn't need the trimmers? I believe Ray Wilsons simple 633-based RM doesn't have them...
C |
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Pehr
Joined: Aug 14, 2005 Posts: 1307 Location: Björkvik, Sweden
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
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Posted: Thu Mar 06, 2008 12:07 am Post subject:
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Pehr wrote: | Coriolis wrote: | A bit confused about this ckt: I thought the 633 was supposed to be so good you didn't need the trimmers? I believe Ray Wilsons simple 633-based RM doesn't have them... |
Me too, the 633 is laser calibrated, right? Rays RMs works fine without them trimmers anyway. I've got four of them (not the sonic multiplier...yet) |
contacted roman about this. here is what he said:
Now back to the topic, the trimmers are there for nulling out the input
offset of given AD633. They are speced for only a few mV of offset, but
stil this can lead to "carrier leakage". We want the ringmod to be fully
ballanced, that means when you feed it with 2 frequencies, you don't get
them at the output, but only sum and difference of input frequencies.
When AD633 is not trimmed, it is seen by AD633 core as there would be
some DC offset, and it causes simple multiplication by constant value,
which leads to transfering input signal to output at some level of
attenuation. If DC offset is high, attenuation is low and input signal
passes thru easily. When no DC is present, there's no DC component and
in theory no direct path to the output.
In reality all those ringmods I'v made were pretty good without
trimmers. I could null them down to 0, but that appeared as "carrier
leakage" improvement by only a few dB. It was about 50-60dB without
trimming, rised probably by 10dB when trimmed. _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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Coriolis
Joined: Apr 11, 2005 Posts: 616 Location: Stilling, Denmark
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Posted: Thu Mar 06, 2008 2:41 am Post subject:
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So he's saying it does matter - even with the 633. Well, gotta try it for myself...
Thanks for this fonik!
C |
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