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Post by jeromemason on Jun 8, 2014 23:31:44 GMT -6
Does anyone know where I can buy Igor's designs?? Specifically the Sontec EQ. I've looked everywhere, and I can't find any kits or just the PCB to purchase. I found the cases, I think dandeurloo makes one if I'm not mistaken, I just need to find where to buy everything else. I've wanted a GML on my buss for some time and if I can hunt this sucker down I'm building it. Help!!! And thank you  |
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Post by wiz on Jun 9, 2014 0:12:31 GMT -6
Does anyone know where I can buy Igor's designs?? Specifically the Sontec EQ. I've looked everywhere, and I can't find any kits or just the PCB to purchase. I found the cases, I think dandeurloo makes one if I'm not mistaken, I just need to find where to buy everything else. I've wanted a GML on my buss for some time and if I can hunt this sucker down I'm building it. Help!!! And thank you Cant really help, other than to say... if you find something, can you post it up here? cheers Wiz |
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Post by jeromemason on Jun 9, 2014 1:41:18 GMT -6
Does anyone know where I can buy Igor's designs?? Specifically the Sontec EQ. I've looked everywhere, and I can't find any kits or just the PCB to purchase. I found the cases, I think dandeurloo makes one if I'm not mistaken, I just need to find where to buy everything else. I've wanted a GML on my buss for some time and if I can hunt this sucker down I'm building it. Help!!! And thank you Cant really help, other than to say... if you find something, can you post it up here? cheers Wiz Yes.......  |
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Deleted
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Post by Deleted on Jun 9, 2014 11:04:28 GMT -6
Hey guys,
good luck finding someone willing to part with an unfinished set of pcb's.
And a set of pots. These are not easy to get.
The other way to do it, which is highly recommended, is building a mastering version with rotary switches, which is a costly thing to do and a lot of solder work. Maybe ~1500 resistors for the stereo set? (no joke.)
Igor hasn't shown up for around 2 yrs. now in the DIY business, and some people are quite pissed off, because they seemingly not received their paid stuff....he also moved in Israel, so nobody of his former customers seems to know his new address.
It could be you can get your hand on Fabio's Sontec pcb pdfs.
These are harder to build, because they have all the filter pcbs to be wired by hand, mounted vertically in the case.
Nothing for the faint of heart and impatient and harder to get quiet. (shielding between the filters will do...)
But more like the original Sontec, because it does use discrete opamps in all original places, not only on the makeup gain, like Igor's.
I have still a set of Igor's but i am *not* willing to part with nor breaking his copyright on the pcbs. Because they cost me alot of money as a complete stereo set incl. pots and i nearly have everything to complete them for the 2-bus in stock...
BUT...it would be not too hard to design a similar pcb set.
It is just the filters all on a double sided pcb.
Pretty much identical circuit as the original circuit, just laid out for OPA604 (or whatever your favourite chip amp may be, OPA607, ADA797, or even the newer ones, maybe even the ADA 4898-1 -2, which sounds breathtaking, with minor changes of the pcb components maybe) instead of discrete opamps. Plus the classical discrete opamp summing amp stage.
It is a great design, and the GML just uses other filter parameters that have been analysed and recalculated for parts choice by several people. I have to take a look, but i think i did the calculations on this in the past with excel, lol. Easy.
I am quite surprised, nobody took the flag and re-designed a new pcb set for this.
My guess is that the Net-EQ by Barry Porter is much more popular these days.
I know somebody who really built the Fabio Sontec, got it quiet, and switched to the NetEQ later. (Both for mastering).
BTW - for my set i am not even sure if i use the Massenburg parameter set or the original Sontec one. From an emulation i made in Synthedit to get clear about it i could not even say what i find more useful, and if i would be in the same situation as when i bought the set, i would have bought 2 stereo sets, for a Massenburg one with pots and a Sontec one with rotarys for mastering purposes with 1dB steps ...
The Massenburg version filter choices i find a bit less intuitive to use.
But if you want the real deal, get the GML EQ. Extraordinary opamps, quiet external PSU.
But not particularly cheap.... ;-)
If you are a DIY freak - design your own pcb set. Not *that* hard to do.
Well, ok, not too easy either...
Best regards,
Martin
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Post by jeromemason on Jun 9, 2014 12:14:41 GMT -6
Hey guys, good luck finding someone willing to part with an unfinished set of pcb's. And a set of pots. These are not easy to get. The other way to do it, which is highly recommended, is building a mastering version with rotary switches, which is a costly thing to do and a lot of solder work. Maybe ~1500 resistors for the stereo set? (no joke.) Igor hasn't shown up for around 2 yrs. now in the DIY business, and some people are quite pissed off, because they seemingly not received their paid stuff....he also moved in Israel, so nobody of his former customers seems to know his new address. It could be you can get your hand on Fabio's Sontec pcb pdfs. These are harder to build, because they have all the filter pcbs to be wired by hand, mounted vertically in the case. Nothing for the faint of heart and impatient and harder to get quiet. (shielding between the filters will do...) But more like the original Sontec, because it does use discrete opamps in all original places, not only on the makeup gain, like Igor's. I have still a set of Igor's but i am *not* willing to part with nor breaking his copyright on the pcbs. Because they cost me alot of money as a complete stereo set incl. pots and i nearly have everything to complete them for the 2-bus in stock... BUT...it would be not too hard to design a similar pcb set. It is just the filters all on a double sided pcb. Pretty much identical circuit as the original circuit, just laid out for OPA604 (or whatever your favourite chip amp may be, OPA607, ADA797, or even the newer ones, maybe even the ADA 4898-1 -2, which sounds breathtaking, with minor changes of the pcb components maybe) instead of discrete opamps. Plus the classical discrete opamp summing amp stage. It is a great design, and the GML just uses other filter parameters that have been analysed and recalculated for parts choice by several people. I have to take a look, but i think i did the calculations on this in the past with excel, lol. Easy. I am quite surprised, nobody took the flag and re-designed a new pcb set for this. My guess is that the Net-EQ by Barry Porter is much more popular these days. I know somebody who really built the Fabio Sontec, got it quiet, and switched to the NetEQ later. (Both for mastering). BTW - for my set i am not even sure if i use the Massenburg parameter set or the original Sontec one. From an emulation i made in Synthedit to get clear about it i could not even say what i find more useful, and if i would be in the same situation as when i bought the set, i would have bought 2 stereo sets, for a Massenburg one with pots and a Sontec one with rotarys for mastering purposes with 1dB steps ... The Massenburg version filter choices i find a bit less intuitive to use. But if you want the real deal, get the GML EQ. Extraordinary opamps, quiet external PSU. But not particularly cheap.... ;-) If you are a DIY freak - design your own pcb set. Not *that* hard to do. Well, ok, not too easy either... Best regards, Martin Ummm Martin... I'm thinking you should go ahead and take the reigns on this one..... I'm only in school for Electrical Engineering..... I havn't even gotten into basic circuits yet. I really don't want to wait 2 years to design my own GML!! We are all chanting.... doit doit Doit DOit DOITT!!  |
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Post by jeromemason on Jun 9, 2014 12:20:44 GMT -6
I am eyeballing this one..... it looks like a really nice design, and I get the feeling this one would be a good investment. It is a mastering version, so it's stepped, which means you have to stuff the switches with resistors. There also seems to be a lot of components, but I believe it uses the DOA's as well. I've got an email into the guy to find out how much the full build is, but I'm guessing this would be a pretty expensive one by the looks of the components, not a bad thing at all, like I said, an investment. 3U too. www.diy-racked.com/diy-talk/viewtopic.php?f=7&t=226 |
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Deleted
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Post by Deleted on Jun 9, 2014 13:17:26 GMT -6
Ah...
Well, it seems Purusha took over the business on this one.
With a new pcb - all in one?
I strongly guess it is verrry near the igor version.
Not too cheap. But well, it is no cheap build anyway.
Did miss this one - so, a very partial, kit is available again on this one.
Thanks, Jerome, for sharing the find...
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Post by winetree on Jun 9, 2014 13:26:23 GMT -6
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Deleted
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Post by Deleted on Jun 20, 2014 3:00:01 GMT -6
Well, i dropped Purusha a line, and will hopefully come up with some more information about his kit soon. In the meantime i saw a few pictures of the populated pcb, to me, it looks pretty similar to the igor build.
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Post by jeromemason on Jun 21, 2014 15:17:00 GMT -6
I noticed that as well Martin..... looking forward to the info you get from Purusha. I'd love to build one of these. From what I've read it's pretty much Igors design. I'm assuming it will require the 24-2 switches right? Doesn't Elma make a switch that is similar that doesn't require having to solder all those resistors on the switches? I've seen some guys using stepped switches that use enclosed PCB's with SMD resistors.
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Deleted
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Post by Deleted on Jun 21, 2014 18:22:09 GMT -6
I noticed that as well Martin..... looking forward to the info you get from Purusha. I'd love to build one of these. From what I've read it's pretty much Igors design. I'm assuming it will require the 24-2 switches right? Doesn't Elma make a switch that is similar that doesn't require having to solder all those resistors on the switches? I've seen some guys using stepped switches that use enclosed PCB's with SMD resistors. Hi Jerome, I just got informed about the Sontec clone. It is in stock and planned to keep in stock. It is Igor's circuit + MS Matrix on one PCB. Plus PSU transformer and case and frontpanel and discrete opamp sockets. Readily calculated resistors to get same filter parameters as in the 9500 unit, but as always, it is just a tiny bit of math to get the original Sontec freqency bands if you like those better. So - it is an OK offer, i think. As for the switches: As far as i looked at the build instructions, very inexpensive 23-position switches were used (kukaudio www.kukaudio.com/au/cpxx.asp?id=94). Silly low price, if you ask me! Great for building stepped controls with good stereo tracking, monitor controllers etc.pp... Well worth considering for the Sontec because the pots that would be needed are not easy to get and the Sontec is a very good candidate for mastering... There were estimations for a total cost of ~ $1.8k if i remember it correctly, for the stereo unit - with the stepped controls. Not bad for what you get.. Link to the Kit: www.diy-racked.com/diy-talk/viewtopic.php?f=12&t=232BTW, i invited Tat Purusha from diy-racked.com our forum... |
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kcatthedog
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Post by kcatthedog on Jun 21, 2014 19:41:41 GMT -6
this is interesting !; thx!
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Post by svart on Jun 21, 2014 19:48:18 GMT -6
When I built my canil sontec, I used OMEG pots. I had to buy two sets worth and I sold the second set to offset the cost. I think they were around 5$ a piece, but I had to buy like 20 of them.
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Deleted
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Post by Deleted on Jun 21, 2014 19:57:49 GMT -6
Yeah,
and look at these rotarys mentioned, they are the same price point as what you paid for the omeg pots! Hard to beat...
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Post by diyracked on Jul 3, 2014 4:15:08 GMT -6
Hey guys, if you have any questions regarding the Mastering Sontec I am offering, just ask  I have also 2 x 8ch. 4band Sontec KITs left for sale (Igor's PCBs and parts) with huge 8ch. case for a good price! |
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Post by tonycamphd on Jul 4, 2014 9:08:13 GMT -6
Gass....
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rjuly
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Post by rjuly on Jul 25, 2014 6:41:03 GMT -6
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Post by jeromemason on Jul 25, 2014 13:09:56 GMT -6
Yeah, we've seen this, actually emailed this fella and he said they were in design of a Sontech based of Igors design. I think he's just selling all the left over inventory and after it's gone it's gone. |
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layco
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www.hammerwave.eu
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Post by layco on May 2, 2015 15:51:19 GMT -6
Hi yes I have Sontec EQ based on Igor's design with bypass on every band and global bypass. Here is some pictures. Attachments:
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Post by ppa on May 8, 2015 14:58:17 GMT -6
Several/many Igor's Sontec eqs used my APP992, APP2050E and APP2055 DOA's inside so I know very well the Igor's schematic so I can say his Sontec eq isn't the exact clone of the original one.
The main board has different input section and there are some other differences in other sections, but personally I prefer the Igor Sontec than the original version.
BTW I remenber that very often my customers sent me good comments on it.
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Post by indiehouse on Jun 2, 2015 10:44:15 GMT -6
Another proud builder here, also running Pier's APP992 DOAs. Couldn't help but notice your Ross Martin ADC. Wish mine looked that purdy! Slick, man! |
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druu
Full Member
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Post by druu on Jun 2, 2015 22:31:02 GMT -6
Thanks, I couldn't stand the look of the stock unit in the rack!
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Post by ramshacklerecording on Apr 25, 2017 7:12:03 GMT -6
Hi there, I know this is an old thread, but I just got sent the link by someone with a few questions, so thought I should just clear it up. I took over the designs/copyrights to *some* of Igor's' boards when he quit. Mainly the 500 series stuff. We keep these permanently available at www.ramshacklerecording.com (The website is being reworked but it is still all functional - lower prices now  ). Front panels and L-brackets are available from frontpanels.de After and during the first year (around 2014 I think) I tried to get in touch with Igor to pick up some further designs but to no avail. I've since given up attempting to contact him. The Sontec in particular, however, has been recreated on numerous occasions by other people so I never really saw the worth in keeping that available. The schematics for all his stuff is public domain, so anyone could create a PCB design if they so wish. Feel free to contact me on that or other issues about those boards |
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