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2011-11-16 by elie
Hi, I'm implementing a CS-80 Ring Modulator design on another Yamaha Synth. No problem getting the Modulator & buffer amps, VCO chip but the VCA (IG00151)and Envelope Generator (IG00159) are not practical to purchase. My question is if the VCA and Envelope Generator are Linear or Exponential in function?...not sure if the service manual might answer that so just in case anyone knows? Thanks! Elie
2011-11-16 by b3groover
Elie, I believe they are both. Pin1 is the exponential input and pin 2 is the linear input. There's a block diagram in the Yamaha IC Guide book on page 32 here: *http://tinyurl.com/862alwh* * * *----Jim * On Tue, Nov 15, 2011 at 10:16 PM, elie <elieman@...> wrote: > ** > > > Hi, I'm implementing a CS-80 Ring Modulator design on another Yamaha > Synth. No problem getting the Modulator & buffer amps, VCO chip but the VCA > (IG00151)and Envelope Generator (IG00159) are not practical to purchase. > > My question is if the VCA and Envelope Generator are Linear or Exponential > in function?...not sure if the service manual might answer that so just in > case anyone knows? > > Thanks! > Elie > > > [Non-text portions of this message have been removed]
2011-11-16 by The Old Crow
The 159 is a linear timing/voltage sequence generator that uses the exponential input of the 151 to create the exponential sloped envelopes. Crow /**/
On 11/15/2011 9:16 PM, elie wrote: > Hi, I'm implementing a CS-80 Ring Modulator design on another Yamaha Synth. No problem getting the Modulator& buffer amps, VCO chip but the VCA (IG00151)and Envelope Generator (IG00159) are not practical to purchase. > > My question is if the VCA and Envelope Generator are Linear or Exponential in function?...not sure if the service manual might answer that so just in case anyone knows? > > Thanks! > Elie > >
2011-11-18 by elie
Thanks for the insight, I'll have to come up with a suitable substitute - turns out the VCO part is not available - the part I had my eye on has +/- a zero vs. the proper part... http://www.organforum.com/forums/showthread.php?18878-latest-OrganGrinder-list I'll get there eventually! Elie --- In yamahacs80@yahoogroups.com, The Old Crow <oldcrow@...> wrote:
> > The 159 is a linear timing/voltage sequence generator that uses the > exponential input of the 151 to create the exponential sloped envelopes. > > Crow > /**/ > > On 11/15/2011 9:16 PM, elie wrote: > > Hi, I'm implementing a CS-80 Ring Modulator design on another Yamaha Synth. No problem getting the Modulator& buffer amps, VCO chip but the VCA (IG00151)and Envelope Generator (IG00159) are not practical to purchase. > > > > My question is if the VCA and Envelope Generator are Linear or Exponential in function?...not sure if the service manual might answer that so just in case anyone knows? > > > > Thanks! > > Elie > > > > >
2011-11-19 by The Old Crow
You do not really need the 159/151 to make an attack-release EG just for a modulator. Google for a "attack release envelope generator schematic." The IG00150 is another part I plan to make as a small retrofit board. --Crow
On 11/18/2011 3:35 PM, elie wrote: > Thanks for the insight, I'll have to come up with a suitable substitute - turns out the VCO part is not available - the part I had my eye on has +/- a zero vs. the proper part... > > http://www.organforum.com/forums/showthread.php?18878-latest-OrganGrinder-list > > I'll get there eventually! > > Elie > > --- In yamahacs80@yahoogroups.com, The Old Crow<oldcrow@...> wrote: >> The 159 is a linear timing/voltage sequence generator that uses the >> exponential input of the 151 to create the exponential sloped envelopes. >> >> Crow >> /**/ >> >> On 11/15/2011 9:16 PM, elie wrote: >>> Hi, I'm implementing a CS-80 Ring Modulator design on another Yamaha Synth. No problem getting the Modulator& buffer amps, VCO chip but the VCA (IG00151)and Envelope Generator (IG00159) are not practical to purchase. >>> >>> My question is if the VCA and Envelope Generator are Linear or Exponential in function?...not sure if the service manual might answer that so just in case anyone knows? >>> >>> Thanks! >>> Elie >>> >>> > > > > ------------------------------------ > > Yahoo! Groups Links > > > > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.1872 / Virus Database: 2092/4624 - Release Date: 11/18/11 > >
2012-01-08 by elie
Re: Tech Question Regarding CS-80 Ring Modulator Thanks! The retrofit board would be great for a physical substitution whenever it comes to fruition, otherwise I followed your immediate suggestion and looked at alternatives... Since my mods are still at the prototyping phase, I bread-boarded a Thomas Henry related Ring Modulator Design utilizing an XR2206 which has the Triangle/Sine VCO and built-in Multiplier. I tested it in my CSY-2 synth/organ by feeding the separated VCO output to the Multiplier Input (other side is occupied by the internal VCO of course). Since the Henry design provided an Oscillator Voltage Controlled Freq. terminal, I took a tap off the CSY-2 'after-touch' circuit and summed that with a feed from the CSY-2 VCF envelope generator output and slow oscillator (LFO) with some very pleasing results! By providing gain, offset & polarity adjustments to the respective Ring Modulator VCO modulation sources (in combination with setting a default/static VCO frequency) there was maximum flexibility to produce the whole gamut of Ring Mod. styled effects...very cool! Thanks again for the suggestions, please let me know if you have anything to add, especially if you have any specific opinion of my having used the XR2206 vs. the UA796 (MC1496 equivalent part?) as found in the CS-80 in combination with the XR2206 to provide the VCO functionality. Also, I believe the CSY-2 VCF envelope generator source I used is exponential, but I'll have to confirm. Elie --- In yamahacs80@yahoogroups.com, The Old Crow <oldcrow@...> wrote:
> > You do not really need the 159/151 to make an attack-release EG just > for a modulator. Google for a "attack release envelope generator > schematic." The IG00150 is another part I plan to make as a small > retrofit board. --Crow > > On 11/18/2011 3:35 PM, elie wrote: > > Thanks for the insight, I'll have to come up with a suitable substitute - turns out the VCO part is not available - the part I had my eye on has +/- a zero vs. the proper part... > > > > http://www.organforum.com/forums/showthread.php?18878-latest-OrganGrinder-list > > > > I'll get there eventually! > > > > Elie > > > > --- In yamahacs80@yahoogroups.com, The Old Crow<oldcrow@> wrote: > >> The 159 is a linear timing/voltage sequence generator that uses the > >> exponential input of the 151 to create the exponential sloped envelopes. > >> > >> Crow > >> /**/ > >> > >> On 11/15/2011 9:16 PM, elie wrote: > >>> Hi, I'm implementing a CS-80 Ring Modulator design on another Yamaha Synth. No problem getting the Modulator& buffer amps, VCO chip but the VCA (IG00151)and Envelope Generator (IG00159) are not practical to purchase. > >>> > >>> My question is if the VCA and Envelope Generator are Linear or Exponential in function?...not sure if the service manual might answer that so just in case anyone knows? > >>> > >>> Thanks! > >>> Elie > >>> > >>> > > > > > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > > > > > > > ----- > > No virus found in this message. > > Checked by AVG - www.avg.com > > Version: 2012.0.1872 / Virus Database: 2092/4624 - Release Date: 11/18/11 > > > > >