Re: Autotune on OBXa suddenly shutting down all voices
2015-08-27 by synthparts@...
It depends on the rev. If yours in an earlier one it has 4 smaller RAM chips. Doug synthparts.com
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Re: Autotune on OBXa suddenly shutting down all voices
2015-08-27 by richtrix@...
Thanks Doug.. Chips... plural? I thought there was only one 6116... Is that not correct? Sincerely, Rich Clarke
Re: Autotune on OBXa suddenly shutting down all voices
2015-08-26 by synthparts@...
The RAM chips could be bad. I have them in stock if you want any. Doug synthparts.com
Re: Autotune on OBXa suddenly shutting down all voices
2015-08-25 by richtrix@...
So I finally figured out the problem with this machine. I was on the phone with Bruce Forat about my Linn 9000 and he suggested disabling the midi kit and
Re: [oberheim] Mystery mod on non functional OB8 - thoughts? [1 Attachment]
2015-08-13 by Patrick Edwards
It looks like somebody replaced the +5v rectifier (which, when stock, overheats and dies easily) with a more robust one with better current ability. I would
Re: Mystery mod on non functional OB8 - thoughts?
2015-08-12 by synthparts@...
This is a very common mod and actually recommended for OB-8s. The existing 5V rectifier was too small so a larger one is highly recommended..Here s an even
Re: [oberheim] Mystery mod on non functional OB8 - thoughts? [1 Attachment]
2015-08-12 by Nick Zampiello
looks like they were having trouble with the power supply and moved that rectifier off the board due to heat or trace damage possibly. NEW ALLIANCE EAST!!!!
Re: [oberheim] Mystery mod on non functional OB8 - thoughts? [1 Attachment]
2015-08-12 by pjwhite@...
The rectifiers (off board, and with heat sinks) were probably attempts at improvements on the notoriously underrated W02M rectifiers that are standard on most
Re: [oberheim] Mystery mod on non functional OB8 - thoughts? [1 Attachment]
2015-08-12 by Martin Ator
The red wires go to a diode bridge which smooths out the AC to the capacitor that the black gnd wire is connected to to give DC? Basically a larger version of
Mystery mod on non functional OB8 - thoughts?
2015-08-12 by brel
hi all, long time reader but haven t really posted. recently inherited a non functional OB8 - good news is that it powers up and the lights change when
Re: [oberheim] matrix 1000 patchnames in midiquest?
2015-08-11 by Thomas Dial
I might. I ll check when I get home from work. Sent from my iPhone
matrix 1000 patchnames in midiquest?
2015-08-11 by cowuddersg@...
Does anybody have a MidiQuest Set with the real names for the ROM banks and would like to share? thanks!
Re: Autotune on OBXa suddenly shutting down all voices
2015-08-02 by Jill Saphic
eeek!good luck...
Re: [oberheim] Re: Autotune on OBXa suddenly shutting down all voices
2015-07-27 by richtrix@...
So exploring my volts per octave problem I verified that my transpose voltages are on the money. Pin C5: 0V (down) 1V (open), 2V (up). The voltage method is
Re: [oberheim] Re: Autotune on OBXa suddenly shutting down all voices
2015-07-26 by richtrix@...
There may be some merit to your idea John. I got out my trusty digital strobe tuner and everthing seemed close enough to concert to be only a short tweak of
Re: [oberheim] Re: Autotune on OBXa suddenly shutting down all voices
2015-07-25 by John Leimseider
When it s suddenly failed, I d make sure that there aren t bad trimpots in the bender section. If it s in tune before the autotune, make sure it s actually in
Re: [oberheim] Re: Autotune on OBXa suddenly shutting down all voices [18 Attachments]
2015-07-25 by Bob Grieb
Hi, I would agree that that waveform has some issues. The signal oscmux is the output of an op amp fed by a sum of the voices. It will be swinging rail to
Re: [oberheim] Re: Autotune on OBXa suddenly shutting down all voices
2015-07-25 by richtrix@...
Thanks yet again Bob for your help. You are a treasure in this Yahoo! community. So the results are strange. I scoped pin 10 (clock, according to the internet)
Re: [oberheim] Oberheim DX Won't start (neither REC)
2015-07-24 by Bruno Lhuissier
Ok the tempo clock is dead.. Le Lundi 20 juillet 2015 19h15, Nick Zampiello newallianceeast@yahoo.com [oberheim] a écrit :
Re: [oberheim] Re: Autotune on OBXa suddenly shutting down all voices
2015-07-22 by Bob Grieb
On the first ed schem, A118, A119, 120, 121, 122, 123, 114, 112, 113 are all involved AT means autotune... Not sure what chips on the later schem, as I don t
Re: Autotune on OBXa suddenly shutting down all voices
2015-07-22 by richtrix@...
Thanks for the responses everyone @65 lotus... It sounds fine when turned on. Played it for quite a while. Nothing terribly out of whack.... until you hit
Re: [oberheim] Autotune on OBXa suddenly shutting down all voices
2015-07-21 by Nick Zampiello
sounds like the voices aren;t getting to the tuning read point. NEW ALLIANCE EAST!!!! ... New Alliance East - Mastering New Alliance East - Facebook X
RE: [oberheim] Autotune on OBXa suddenly shutting down all voices
2015-07-21 by 65 Lotus
How does it sound if you don t hit autotune? That is, if you power it up from dead cold and let it sit for a half hour, is it pretty much in tune on it s own,
Re: [oberheim] Autotune on OBXa suddenly shutting down all voices
2015-07-21 by Bob Grieb
Clearly something in the autotune circuitry is not working. There is a comparator that gets fed one voice at a time. The comparator output is used to gate
Autotune on OBXa suddenly shutting down all voices
2015-07-21 by richtrix@...
I have an OBXa that I finally got to 100% percent with a lot of help from here and some dumb luck a few months ago. I have the Encore MIDI kit. I haven t
Re: [oberheim] Oberheim DX Won't start (neither REC)
2015-07-20 by Nick Zampiello
external sync? the newer OS has several sync options z NEW ALLIANCE EAST!!!! ... New Alliance East - Mastering New Alliance East - Facebook X :::: B :::: S
Oberheim DX Won't start (neither REC)
2015-07-20 by lhuissierbruno@...
Lo, My Oberheim DX Won t play neither REC anymore. The button led light on but don t start sequencer. RAM dead ? Clock circuit dead ? Any idea ?
Re: [oberheim] OT: 50KB Juno 60 slider needed
2015-06-06 by Marc D
Hey Gil! Try Deoxit first ... if it doesn´t help go to Roland Juno-60 Slider / Slide Pot ... Hope I could help! Regards Marcus From: gilwe@hotmail.com
OBERHEIM MATRIX-6 HELP
2015-05-28 by fknchino@...
Hey folks, I figured the Matrix is getting old and it s starting to play up a little I had the machine turn on/off randomly a few times before it wouldn t turn
Re: matrix modulation of oberheim matrix6 via sysex
2015-05-28 by jan@...
TL;DR: There is none. The only way is to send a complete patch via Sysex. I could not believe it myself but the commands to program a matrix modulation path
matrix modulation of oberheim matrix6 via sysex
2015-05-27 by Fer Real
Hi. To modify the matrix modulation of a oberheim matrix6 via sysex ... What it is the syntax of command ?,the midi documentation of matrix6 not talk about
Re: [oberheim] Anyone here know anything about the Linn 9000?
2015-05-26 by Neil Hester
If the chips are socketed rather than soldered, with the machine unplugged very very carefully lever them out a little bit and push them back in a few times
Re: Anyone here know anything about the Linn 9000?
2015-05-26 by synthparts@...
You should take this to the Linn group - LINNDRUM https://groups.yahoo.com/neo/groups/Linndrum/info https://groups.yahoo.com/neo/groups/Linndrum/info LINNDRUM
Re: [oberheim] Anyone here know anything about the Linn 9000?
2015-05-24 by richtrix@...
Hi Bob and Denny, Indeed the batteries are shot and corroding. The corrosion may have actually caused some damage to components or the PCB as well. Time will
Re: [oberheim] Anyone here know anything about the Linn 9000?
2015-05-23 by DeVille
Also check the backup batteries. I had trouble with my 9000 when they started going bad. Denny Chandler -----Original Message----- From: Bob Grieb
Re: [oberheim] Anyone here know anything about the Linn 9000?
2015-05-23 by Bob Grieb
If you search for Linn 9000 schematic, you will find it quickly.I just downloaded it. Unfortunately, the scan of the processor page is pretty bad.
Re: [oberheim] Anyone here know anything about the Linn 9000?
2015-05-22 by richtrix@...
Thanks Denny, Yeah I know they are around still. They will cost an arm and a leg though I m sure. I am surprised I can t even find a service manual online
Re: [oberheim] Anyone here know anything about the Linn 9000?
2015-05-22 by DeVille
The Forat brothers are still in business. They also finished the software (which was never right)! Give Ben or Bruce a call. Or email. Denny Chandler
Anyone here know anything about the Linn 9000?
2015-05-22 by richtrix@...
Or a good forum to talk about them? Sorry to ask here in the Oberheim but I really love this group. I just picked up 2 Linn 9000s today off Craigslist. I am
Re: [oberheim] Re: Matrix6 vs bcr2000
2015-05-22 by Fer Real
Hi. Thank you very much for the reply, I stop trying this :(. I have another 2 more doubts that maybe you if you have achieved: 1) Can I set negative values
Re: Perf EPROMS for sale?
2015-05-21 by kloopy@...
They should all work, clock is 12 MHz in Perf/X
Re: Perf EPROMS for sale?
2015-05-20 by youthvulture@...
Before you go through too much hassle, I would make certain that the power supply you re using is spitting out a clean 9 volts. When I first got my Strummer I
Re: Perf EPROMS for sale?
2015-05-20 by synergeezer@...
Jameco says they have them. 80C31: MAJOR BRANDS: ICs & Semiconductors
Re: Perf EPROMS for sale?
2015-05-20 by kloopy@...
Hi, this Drummer I was working on froze after few seconds or minutes of browsing through presets and functions. It could be similar issue and it s worth
Re: Perf EPROMS for sale?
2015-05-20 by giramsey@...
Hi, do you have a link to this chip, there are a few that come up if you search microcontroller 80C31 on eBay. My cyclone every now and then when turned on the
Re: Perf EPROMS for sale?
2015-05-20 by kloopy@...
Hi all, I have an update on this. It turned out that microcontroller 80C31 was guilty for machine freezing up soon after powering. You can get this chip on
Re: Matrix6 vs bcr2000
2015-05-18 by jan@...
Although it is possible to control individual parameters to the Matrix via Sysex, there is no way to read out parameter values. It s just not in the firmware.
Matrix6 vs bcr2000
2015-05-17 by Fer Real
Hello. I created a template for oberheim matrix6 with bcr2000 controller, everything works fine (bcmanager is a great program !!), but can not get the feedback
Re: Perf EPROMS for sale?
2015-05-09 by kloopy@...
Surprisingly, a guy, here from London contacted me and sent me one test Drummer chip. The chip works great in my Cyclone though this one I m trying to repair
Re: Finding Clock frequency of my OBXa
2015-05-05 by richtrix@...
Hi Again Bob (and all) So I got my new BlueDSO (bluedso.com) in the mail today and the last one I received was defective for sure as this one works just great.