Cgs synth

On Sep 14, 2008, at 11:11 PM, Dave wrote:

> Hi all,
>
> I just finished building a cynare :) But am having problems with
> the filter section. I am building a kit supplied by bridechamber
> which has three separate SPDT switches for the filter types. I have
> added the 6 pots for the osc and also added the impact gen mod to it
> too (I subbed in a 100k pot for the 25k for now until I can get the
> 25k pot). These mods seem to work correctly. I also changed the R
> gain resistor to 1.5k instead of the 10k.
>
> I followed the CGS wiring diagram exactly assuming that the pot
> shafts are facing away from me and CW is 3 (I am not sure about this).
> One strange thing I noticed with this is that the Decay and Damper
> pots seem wired backwards so that as I turn it from 0 to 10 the decay
> shortens for both, I would think it should lengthen the decay as you
> turn the pot towards 10. The tone or balance between noise and
> shimmer operates correctly.
>
> The problem with the filter is that the filter sweep is minimal
> in effect, the envelope affects the impact sound strangely, when in
> the middle (5) there is little to no impact sound and when at either 0
> or 10 the impact is back (sweeping the impact pot mod changes the
> character of the impact sound). The resonance pot is also acting very
> strange. I have wired the three switches as best I
> knew how which is took the LP, BP, and HP and wired them to the bottom
> lugs of three switches then I wired some bus wire across the three
> middle lugs of the switches and attached the common wire to that. I
> don't know if that is correct but it makes sense to me. When I switch
> between the filter types I can hear changes in tone that corresponds
> to the filter type.
>
> Did I wire the three switches correctly, if not how should I do this?
>
> The main malfunction seems to come from the resonance pot. It does
> not increase the resonance and when I turn it all sound going through
> the filter is silenced for about 1-2 seconds and then comes back again
> with no change regardless of whether it is at 0 or 10.
>
> I'm new to the DIY so I don't want to mess with things too much
> while trouble shooting, so I've gone over the board looking for shorts
> and poor connections but have not found anything yet, should I try
> changing some of the wires around on the res pot or maybe the freq
> pot? I'm confused as to why the decay and damper seem to operate
> backwards from convention and am wondering if I got these wired
> backwards maybe I wired the res or freq pots backwards but I've
> checked over and over again and they match up to kens diagram...
>
> Sorry for the long post :) Any help would be greatly appreciated,
>
> Thanks,
> Dave
>
>
>

[Non-text portions of this message have been removed]

--- In cgs_synth@yahoogroups.com, Scott Deyo <contact@...> wrote:
>
> I think Decay and Damper are backwards on the CGS diagram.
>
> It just occured to me that my panel's envelope pot is labeled wrong!
> Instead of 0 to 10, it should read -5 to +5. It should be at 0 in the
> middle, negative envelope to left, positive to right. Ugh!
> : (
>
> It sounds like you have the switches wired up correctly. Try testing it
> with just lowpass on at first, and checking the resonance again.
>
> Cheers,
> Scott Deyo
> The Bridechamber
> contact@...
> http://www.bridechamber.com
> Jealous Edison Record Kompany
> http://www.jealousedison.com
>
>
> On Sep 14, 2008, at 11:11 PM, Dave wrote:
>
> > Hi all,
> >
> > I just finished building a cynare :) But am having problems with
> > the filter section. I am building a kit supplied by bridechamber
> > which has three separate SPDT switches for the filter types. I have
> > added the 6 pots for the osc and also added the impact gen mod to it
> > too (I subbed in a 100k pot for the 25k for now until I can get the
> > 25k pot). These mods seem to work correctly. I also changed the R
> > gain resistor to 1.5k instead of the 10k.
> >
> > I followed the CGS wiring diagram exactly assuming that the pot
> > shafts are facing away from me and CW is 3 (I am not sure about
this).
> > One strange thing I noticed with this is that the Decay and Damper
> > pots seem wired backwards so that as I turn it from 0 to 10 the decay
> > shortens for both, I would think it should lengthen the decay as you
> > turn the pot towards 10. The tone or balance between noise and
> > shimmer operates correctly.
> >
> > The problem with the filter is that the filter sweep is minimal
> > in effect, the envelope affects the impact sound strangely, when in
> > the middle (5) there is little to no impact sound and when at
either 0
> > or 10 the impact is back (sweeping the impact pot mod changes the
> > character of the impact sound). The resonance pot is also acting very
> > strange. I have wired the three switches as best I
> > knew how which is took the LP, BP, and HP and wired them to the
bottom
> > lugs of three switches then I wired some bus wire across the three
> > middle lugs of the switches and attached the common wire to that. I
> > don't know if that is correct but it makes sense to me. When I switch
> > between the filter types I can hear changes in tone that corresponds
> > to the filter type.
> >
> > Did I wire the three switches correctly, if not how should I do this?
> >
> > The main malfunction seems to come from the resonance pot. It does
> > not increase the resonance and when I turn it all sound going through
> > the filter is silenced for about 1-2 seconds and then comes back
again
> > with no change regardless of whether it is at 0 or 10.
> >
> > I'm new to the DIY so I don't want to mess with things too much
> > while trouble shooting, so I've gone over the board looking for
shorts
> > and poor connections but have not found anything yet, should I try
> > changing some of the wires around on the res pot or maybe the freq
> > pot? I'm confused as to why the decay and damper seem to operate
> > backwards from convention and am wondering if I got these wired
> > backwards maybe I wired the res or freq pots backwards but I've
> > checked over and over again and they match up to kens diagram...
> >
> > Sorry for the long post :) Any help would be greatly appreciated,
> >
> > Thanks,
> > Dave
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>

On Sep 15, 2008, at 1:17 AM, Dave wrote:

> Hi Scott,
>
> Thanks for the confirmation about the switch wiring :) I'm gonna
> rewire the Decay an Damper pots too. I've tried various switch
> setting from all off to individual on to all on and they all react the
> same to the resonance pot.
>
> Is it possible that the wiring diagram is wrong for the res or freq
> pots? The freq pot wiring seems a little strange compared to the rest
> with the 3 leg of the pot wired to the ferrite bead.
>
> While I'm at it how do I wire the VCF CV pot? Do I wire from EX to
> the middle lug of the pot and then from terminal 1 on the pot to the
> jack?
>
> Thanks,
> Dave
>
> --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@...> wrote:
> >
> > I think Decay and Damper are backwards on the CGS diagram.
> >
> > It just occured to me that my panel's envelope pot is labeled wrong!
> > Instead of 0 to 10, it should read -5 to +5. It should be at 0 in
> the
> > middle, negative envelope to left, positive to right. Ugh!
> > : (
> >
> > It sounds like you have the switches wired up correctly. Try
> testing it
> > with just lowpass on at first, and checking the resonance again.
> >
> > Cheers,
> > Scott Deyo
> > The Bridechamber
> > contact@...
> > http://www.bridechamber.com
> > Jealous Edison Record Kompany
> > http://www.jealousedison.com
> >
> >
> > On Sep 14, 2008, at 11:11 PM, Dave wrote:
> >
> > > Hi all,
> > >
> > > I just finished building a cynare :) But am having problems with
> > > the filter section. I am building a kit supplied by bridechamber
> > > which has three separate SPDT switches for the filter types. I
> have
> > > added the 6 pots for the osc and also added the impact gen mod to
> it
> > > too (I subbed in a 100k pot for the 25k for now until I can get
> the
> > > 25k pot). These mods seem to work correctly. I also changed the R
> > > gain resistor to 1.5k instead of the 10k.
> > >
> > > I followed the CGS wiring diagram exactly assuming that the pot
> > > shafts are facing away from me and CW is 3 (I am not sure about
> this).
> > > One strange thing I noticed with this is that the Decay and Damper
> > > pots seem wired backwards so that as I turn it from 0 to 10 the
> decay
> > > shortens for both, I would think it should lengthen the decay as
> you
> > > turn the pot towards 10. The tone or balance between noise and
> > > shimmer operates correctly.
> > >
> > > The problem with the filter is that the filter sweep is minimal
> > > in effect, the envelope affects the impact sound strangely, when
> in
> > > the middle (5) there is little to no impact sound and when at
> either 0
> > > or 10 the impact is back (sweeping the impact pot mod changes the
> > > character of the impact sound). The resonance pot is also acting
> very
> > > strange. I have wired the three switches as best I
> > > knew how which is took the LP, BP, and HP and wired them to the
> bottom
> > > lugs of three switches then I wired some bus wire across the three
> > > middle lugs of the switches and attached the common wire to that.
> I
> > > don't know if that is correct but it makes sense to me. When I
> switch
> > > between the filter types I can hear changes in tone that
> corresponds
> > > to the filter type.
> > >
> > > Did I wire the three switches correctly, if not how should I do
> this?
> > >
> > > The main malfunction seems to come from the resonance pot. It does
> > > not increase the resonance and when I turn it all sound going
> through
> > > the filter is silenced for about 1-2 seconds and then comes back
> again
> > > with no change regardless of whether it is at 0 or 10.
> > >
> > > I'm new to the DIY so I don't want to mess with things too much
> > > while trouble shooting, so I've gone over the board looking for
> shorts
> > > and poor connections but have not found anything yet, should I try
> > > changing some of the wires around on the res pot or maybe the freq
> > > pot? I'm confused as to why the decay and damper seem to operate
> > > backwards from convention and am wondering if I got these wired
> > > backwards maybe I wired the res or freq pots backwards but I've
> > > checked over and over again and they match up to kens diagram...
> > >
> > > Sorry for the long post :) Any help would be greatly appreciated,
> > >
> > > Thanks,
> > > Dave
> > >
> > >
> > >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>

[Non-text portions of this message have been removed]

--- In cgs_synth@yahoogroups.com, Scott Deyo <contact@...> wrote:
>
> The CV pot is wired the way you say, but terminal 3 is also wired to
> ground. (i.e., it's wired as an 'attenuator' or voltage divider -- good
> to remember, they're common).
>
> The wiring diagram looks good for freq and res.
>
> Everything has the right orientation -- transistors, diode,
> electrolytics, TL071? The TL071 isn't a TL072? Did you install on the
> links on the board? (I've missed one a few times before.)
> For me, it's usually something painfully obvious once I see it, but for
> some reason I just can't see it though I've looked at it ten times.
> Especially on a single-sided board, make sure all your soldering is OK.
> One weak connection can wreak havoc.
>
>
> Scott Deyo
> The Bridechamber
> contact@...
> http://www.bridechamber.com
> Jealous Edison Record Kompany
> http://www.jealousedison.com
>
>
> On Sep 15, 2008, at 1:17 AM, Dave wrote:
>
> > Hi Scott,
> >
> > Thanks for the confirmation about the switch wiring :) I'm gonna
> > rewire the Decay an Damper pots too. I've tried various switch
> > setting from all off to individual on to all on and they all
react the
> > same to the resonance pot.
> >
> > Is it possible that the wiring diagram is wrong for the res or freq
> > pots? The freq pot wiring seems a little strange compared to the rest
> > with the 3 leg of the pot wired to the ferrite bead.
> >
> > While I'm at it how do I wire the VCF CV pot? Do I wire from EX to
> > the middle lug of the pot and then from terminal 1 on the pot to the
> > jack?
> >
> > Thanks,
> > Dave
> >
> > --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@> wrote:
> > >
> > > I think Decay and Damper are backwards on the CGS diagram.
> > >
> > > It just occured to me that my panel's envelope pot is labeled
wrong!
> > > Instead of 0 to 10, it should read -5 to +5. It should be at 0 in
> > the
> > > middle, negative envelope to left, positive to right. Ugh!
> > > : (
> > >
> > > It sounds like you have the switches wired up correctly. Try
> > testing it
> > > with just lowpass on at first, and checking the resonance again.
> > >
> > > Cheers,
> > > Scott Deyo
> > > The Bridechamber
> > > contact@
> > > http://www.bridechamber.com
> > > Jealous Edison Record Kompany
> > > http://www.jealousedison.com
> > >
> > >
> > > On Sep 14, 2008, at 11:11 PM, Dave wrote:
> > >
> > > > Hi all,
> > > >
> > > > I just finished building a cynare :) But am having problems with
> > > > the filter section. I am building a kit supplied by bridechamber
> > > > which has three separate SPDT switches for the filter types. I
> > have
> > > > added the 6 pots for the osc and also added the impact gen
mod to
> > it
> > > > too (I subbed in a 100k pot for the 25k for now until I can get
> > the
> > > > 25k pot). These mods seem to work correctly. I also changed the R
> > > > gain resistor to 1.5k instead of the 10k.
> > > >
> > > > I followed the CGS wiring diagram exactly assuming that the pot
> > > > shafts are facing away from me and CW is 3 (I am not sure about
> > this).
> > > > One strange thing I noticed with this is that the Decay and
Damper
> > > > pots seem wired backwards so that as I turn it from 0 to 10 the
> > decay
> > > > shortens for both, I would think it should lengthen the decay as
> > you
> > > > turn the pot towards 10. The tone or balance between noise and
> > > > shimmer operates correctly.
> > > >
> > > > The problem with the filter is that the filter sweep is minimal
> > > > in effect, the envelope affects the impact sound strangely, when
> > in
> > > > the middle (5) there is little to no impact sound and when at
> > either 0
> > > > or 10 the impact is back (sweeping the impact pot mod changes the
> > > > character of the impact sound). The resonance pot is also acting
> > very
> > > > strange. I have wired the three switches as best I
> > > > knew how which is took the LP, BP, and HP and wired them to the
> > bottom
> > > > lugs of three switches then I wired some bus wire across the
three
> > > > middle lugs of the switches and attached the common wire to
that.
> > I
> > > > don't know if that is correct but it makes sense to me. When I
> > switch
> > > > between the filter types I can hear changes in tone that
> > corresponds
> > > > to the filter type.
> > > >
> > > > Did I wire the three switches correctly, if not how should I do
> > this?
> > > >
> > > > The main malfunction seems to come from the resonance pot. It
does
> > > > not increase the resonance and when I turn it all sound going
> > through
> > > > the filter is silenced for about 1-2 seconds and then comes back
> > again
> > > > with no change regardless of whether it is at 0 or 10.
> > > >
> > > > I'm new to the DIY so I don't want to mess with things too much
> > > > while trouble shooting, so I've gone over the board looking for
> > shorts
> > > > and poor connections but have not found anything yet, should
I try
> > > > changing some of the wires around on the res pot or maybe the
freq
> > > > pot? I'm confused as to why the decay and damper seem to operate
> > > > backwards from convention and am wondering if I got these wired
> > > > backwards maybe I wired the res or freq pots backwards but I've
> > > > checked over and over again and they match up to kens diagram...
> > > >
> > > > Sorry for the long post :) Any help would be greatly appreciated,
> > > >
> > > > Thanks,
> > > > Dave
> > > >
> > > >
> > > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>

On Sep 15, 2008, at 7:49 PM, Dave wrote:

> I am wondering whether I put the transistors in the right way. I am
> using TO92 style trans that are black plastic with one flat side.
> Right now I have all the 2N2222 and the 2N2907 trans facing the same
> way with the flat part facing up towards the BP HP and LP holes. Is
> this correct?
>
> Thanks,
> Dave
>
> --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@...> wrote:
> >
> > The CV pot is wired the way you say, but terminal 3 is also wired to
> > ground. (i.e., it's wired as an 'attenuator' or voltage divider --
> good
> > to remember, they're common).
> >
> > The wiring diagram looks good for freq and res.
> >
> > Everything has the right orientation -- transistors, diode,
> > electrolytics, TL071? The TL071 isn't a TL072? Did you install on
> the
> > links on the board? (I've missed one a few times before.)
> > For me, it's usually something painfully obvious once I see it, but
> for
> > some reason I just can't see it though I've looked at it ten times.
> > Especially on a single-sided board, make sure all your soldering is
> OK.
> > One weak connection can wreak havoc.
> >
> >
> > Scott Deyo
> > The Bridechamber
> > contact@...
> > http://www.bridechamber.com
> > Jealous Edison Record Kompany
> > http://www.jealousedison.com
> >
> >
> > On Sep 15, 2008, at 1:17 AM, Dave wrote:
> >
> > > Hi Scott,
> > >
> > > Thanks for the confirmation about the switch wiring :) I'm gonna
> > > rewire the Decay an Damper pots too. I've tried various switch
> > > setting from all off to individual on to all on and they all
> react the
> > > same to the resonance pot.
> > >
> > > Is it possible that the wiring diagram is wrong for the res or
> freq
> > > pots? The freq pot wiring seems a little strange compared to the
> rest
> > > with the 3 leg of the pot wired to the ferrite bead.
> > >
> > > While I'm at it how do I wire the VCF CV pot? Do I wire from EX to
> > > the middle lug of the pot and then from terminal 1 on the pot to
> the
> > > jack?
> > >
> > > Thanks,
> > > Dave
> > >
> > > --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@> wrote:
> > > >
> > > > I think Decay and Damper are backwards on the CGS diagram.
> > > >
> > > > It just occured to me that my panel's envelope pot is labeled
> wrong!
> > > > Instead of 0 to 10, it should read -5 to +5. It should be at 0
> in
> > > the
> > > > middle, negative envelope to left, positive to right. Ugh!
> > > > : (
> > > >
> > > > It sounds like you have the switches wired up correctly. Try
> > > testing it
> > > > with just lowpass on at first, and checking the resonance again.
> > > >
> > > > Cheers,
> > > > Scott Deyo
> > > > The Bridechamber
> > > > contact@
> > > > http://www.bridechamber.com
> > > > Jealous Edison Record Kompany
> > > > http://www.jealousedison.com
> > > >
> > > >
> > > > On Sep 14, 2008, at 11:11 PM, Dave wrote:
> > > >
> > > > > Hi all,
> > > > >
> > > > > I just finished building a cynare :) But am having problems
> with
> > > > > the filter section. I am building a kit supplied by
> bridechamber
> > > > > which has three separate SPDT switches for the filter types. I
> > > have
> > > > > added the 6 pots for the osc and also added the impact gen
> mod to
> > > it
> > > > > too (I subbed in a 100k pot for the 25k for now until I can
> get
> > > the
> > > > > 25k pot). These mods seem to work correctly. I also changed
> the R
> > > > > gain resistor to 1.5k instead of the 10k.
> > > > >
> > > > > I followed the CGS wiring diagram exactly assuming that the
> pot
> > > > > shafts are facing away from me and CW is 3 (I am not sure
> about
> > > this).
> > > > > One strange thing I noticed with this is that the Decay and
> Damper
> > > > > pots seem wired backwards so that as I turn it from 0 to 10
> the
> > > decay
> > > > > shortens for both, I would think it should lengthen the decay
> as
> > > you
> > > > > turn the pot towards 10. The tone or balance between noise and
> > > > > shimmer operates correctly.
> > > > >
> > > > > The problem with the filter is that the filter sweep is
> minimal
> > > > > in effect, the envelope affects the impact sound strangely,
> when
> > > in
> > > > > the middle (5) there is little to no impact sound and when at
> > > either 0
> > > > > or 10 the impact is back (sweeping the impact pot mod changes
> the
> > > > > character of the impact sound). The resonance pot is also
> acting
> > > very
> > > > > strange. I have wired the three switches as best I
> > > > > knew how which is took the LP, BP, and HP and wired them to
> the
> > > bottom
> > > > > lugs of three switches then I wired some bus wire across the
> three
> > > > > middle lugs of the switches and attached the common wire to
> that.
> > > I
> > > > > don't know if that is correct but it makes sense to me. When I
> > > switch
> > > > > between the filter types I can hear changes in tone that
> > > corresponds
> > > > > to the filter type.
> > > > >
> > > > > Did I wire the three switches correctly, if not how should I
> do
> > > this?
> > > > >
> > > > > The main malfunction seems to come from the resonance pot. It
> does
> > > > > not increase the resonance and when I turn it all sound going
> > > through
> > > > > the filter is silenced for about 1-2 seconds and then comes
> back
> > > again
> > > > > with no change regardless of whether it is at 0 or 10.
> > > > >
> > > > > I'm new to the DIY so I don't want to mess with things too
> much
> > > > > while trouble shooting, so I've gone over the board looking
> for
> > > shorts
> > > > > and poor connections but have not found anything yet, should
> I try
> > > > > changing some of the wires around on the res pot or maybe the
> freq
> > > > > pot? I'm confused as to why the decay and damper seem to
> operate
> > > > > backwards from convention and am wondering if I got these
> wired
> > > > > backwards maybe I wired the res or freq pots backwards but
> I've
> > > > > checked over and over again and they match up to kens
> diagram...
> > > > >
> > > > > Sorry for the long post :) Any help would be greatly
> appreciated,
> > > > >
> > > > > Thanks,
> > > > > Dave
> > > > >
> > > > >
> > > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> > >
> > >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>

[Non-text portions of this message have been removed]

--- In cgs_synth@yahoogroups.com, Scott Deyo <contact@...> wrote:
>
> There you go. The round part of the transistor goes towards the BP HP
> LP holes.
>
> Scott Deyo
> The Bridechamber
> contact@...
> http://www.bridechamber.com
> Jealous Edison Record Kompany
> http://www.jealousedison.com
>
>
> On Sep 15, 2008, at 7:49 PM, Dave wrote:
>
> > I am wondering whether I put the transistors in the right way. I am
> > using TO92 style trans that are black plastic with one flat side.
> > Right now I have all the 2N2222 and the 2N2907 trans facing the same
> > way with the flat part facing up towards the BP HP and LP holes. Is
> > this correct?
> >
> > Thanks,
> > Dave
> >
> > --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@> wrote:
> > >
> > > The CV pot is wired the way you say, but terminal 3 is also
wired to
> > > ground. (i.e., it's wired as an 'attenuator' or voltage divider --
> > good
> > > to remember, they're common).
> > >
> > > The wiring diagram looks good for freq and res.
> > >
> > > Everything has the right orientation -- transistors, diode,
> > > electrolytics, TL071? The TL071 isn't a TL072? Did you install on
> > the
> > > links on the board? (I've missed one a few times before.)
> > > For me, it's usually something painfully obvious once I see it,
but
> > for
> > > some reason I just can't see it though I've looked at it ten times.
> > > Especially on a single-sided board, make sure all your
soldering is
> > OK.
> > > One weak connection can wreak havoc.
> > >
> > >
> > > Scott Deyo
> > > The Bridechamber
> > > contact@
> > > http://www.bridechamber.com
> > > Jealous Edison Record Kompany
> > > http://www.jealousedison.com
> > >
> > >
> > > On Sep 15, 2008, at 1:17 AM, Dave wrote:
> > >
> > > > Hi Scott,
> > > >
> > > > Thanks for the confirmation about the switch wiring :) I'm gonna
> > > > rewire the Decay an Damper pots too. I've tried various switch
> > > > setting from all off to individual on to all on and they all
> > react the
> > > > same to the resonance pot.
> > > >
> > > > Is it possible that the wiring diagram is wrong for the res or
> > freq
> > > > pots? The freq pot wiring seems a little strange compared to the
> > rest
> > > > with the 3 leg of the pot wired to the ferrite bead.
> > > >
> > > > While I'm at it how do I wire the VCF CV pot? Do I wire from
EX to
> > > > the middle lug of the pot and then from terminal 1 on the pot to
> > the
> > > > jack?
> > > >
> > > > Thanks,
> > > > Dave
> > > >
> > > > --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@> wrote:
> > > > >
> > > > > I think Decay and Damper are backwards on the CGS diagram.
> > > > >
> > > > > It just occured to me that my panel's envelope pot is labeled
> > wrong!
> > > > > Instead of 0 to 10, it should read -5 to +5. It should be at 0
> > in
> > > > the
> > > > > middle, negative envelope to left, positive to right. Ugh!
> > > > > : (
> > > > >
> > > > > It sounds like you have the switches wired up correctly. Try
> > > > testing it
> > > > > with just lowpass on at first, and checking the resonance
again.
> > > > >
> > > > > Cheers,
> > > > > Scott Deyo
> > > > > The Bridechamber
> > > > > contact@
> > > > > http://www.bridechamber.com
> > > > > Jealous Edison Record Kompany
> > > > > http://www.jealousedison.com
> > > > >
> > > > >
> > > > > On Sep 14, 2008, at 11:11 PM, Dave wrote:
> > > > >
> > > > > > Hi all,
> > > > > >
> > > > > > I just finished building a cynare :) But am having problems
> > with
> > > > > > the filter section. I am building a kit supplied by
> > bridechamber
> > > > > > which has three separate SPDT switches for the filter
types. I
> > > > have
> > > > > > added the 6 pots for the osc and also added the impact gen
> > mod to
> > > > it
> > > > > > too (I subbed in a 100k pot for the 25k for now until I can
> > get
> > > > the
> > > > > > 25k pot). These mods seem to work correctly. I also changed
> > the R
> > > > > > gain resistor to 1.5k instead of the 10k.
> > > > > >
> > > > > > I followed the CGS wiring diagram exactly assuming that the
> > pot
> > > > > > shafts are facing away from me and CW is 3 (I am not sure
> > about
> > > > this).
> > > > > > One strange thing I noticed with this is that the Decay and
> > Damper
> > > > > > pots seem wired backwards so that as I turn it from 0 to 10
> > the
> > > > decay
> > > > > > shortens for both, I would think it should lengthen the
decay
> > as
> > > > you
> > > > > > turn the pot towards 10. The tone or balance between
noise and
> > > > > > shimmer operates correctly.
> > > > > >
> > > > > > The problem with the filter is that the filter sweep is
> > minimal
> > > > > > in effect, the envelope affects the impact sound strangely,
> > when
> > > > in
> > > > > > the middle (5) there is little to no impact sound and when at
> > > > either 0
> > > > > > or 10 the impact is back (sweeping the impact pot mod
changes
> > the
> > > > > > character of the impact sound). The resonance pot is also
> > acting
> > > > very
> > > > > > strange. I have wired the three switches as best I
> > > > > > knew how which is took the LP, BP, and HP and wired them to
> > the
> > > > bottom
> > > > > > lugs of three switches then I wired some bus wire across the
> > three
> > > > > > middle lugs of the switches and attached the common wire to
> > that.
> > > > I
> > > > > > don't know if that is correct but it makes sense to me.
When I
> > > > switch
> > > > > > between the filter types I can hear changes in tone that
> > > > corresponds
> > > > > > to the filter type.
> > > > > >
> > > > > > Did I wire the three switches correctly, if not how should I
> > do
> > > > this?
> > > > > >
> > > > > > The main malfunction seems to come from the resonance pot. It
> > does
> > > > > > not increase the resonance and when I turn it all sound going
> > > > through
> > > > > > the filter is silenced for about 1-2 seconds and then comes
> > back
> > > > again
> > > > > > with no change regardless of whether it is at 0 or 10.
> > > > > >
> > > > > > I'm new to the DIY so I don't want to mess with things too
> > much
> > > > > > while trouble shooting, so I've gone over the board looking
> > for
> > > > shorts
> > > > > > and poor connections but have not found anything yet, should
> > I try
> > > > > > changing some of the wires around on the res pot or maybe the
> > freq
> > > > > > pot? I'm confused as to why the decay and damper seem to
> > operate
> > > > > > backwards from convention and am wondering if I got these
> > wired
> > > > > > backwards maybe I wired the res or freq pots backwards but
> > I've
> > > > > > checked over and over again and they match up to kens
> > diagram...
> > > > > >
> > > > > > Sorry for the long post :) Any help would be greatly
> > appreciated,
> > > > > >
> > > > > > Thanks,
> > > > > > Dave
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > > [Non-text portions of this message have been removed]
> > > > >
> > > >
> > > >
> > > >
> > >
> > > [Non-text portions of this message have been removed]
> > >
> >
> >
> >
>
> [Non-text portions of this message have been removed]
>

On Sep 15, 2008, at 9:40 PM, Dave wrote:

> Yep, that fixed it :) I'm learning more about this stuff than I
> thought I ever would! Checking data sheets to see whats what. CBE,
> EBC seems simple enough, just gotta know it.
>
> Thanks for the help Scott,
>
> Dave
>
> --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@...> wrote:
> >
> > There you go. The round part of the transistor goes towards the BP
> HP
> > LP holes.
> >
> > Scott Deyo
> > The Bridechamber
> > contact@...
> > http://www.bridechamber.com
> > Jealous Edison Record Kompany
> > http://www.jealousedison.com
> >
> >
> > On Sep 15, 2008, at 7:49 PM, Dave wrote:
> >
> > > I am wondering whether I put the transistors in the right way. I
> am
> > > using TO92 style trans that are black plastic with one flat side.
> > > Right now I have all the 2N2222 and the 2N2907 trans facing the
> same
> > > way with the flat part facing up towards the BP HP and LP holes.
> Is
> > > this correct?
> > >
> > > Thanks,
> > > Dave
> > >
> > > --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@> wrote:
> > > >
> > > > The CV pot is wired the way you say, but terminal 3 is also
> wired to
> > > > ground. (i.e., it's wired as an 'attenuator' or voltage divider
> --
> > > good
> > > > to remember, they're common).
> > > >
> > > > The wiring diagram looks good for freq and res.
> > > >
> > > > Everything has the right orientation -- transistors, diode,
> > > > electrolytics, TL071? The TL071 isn't a TL072? Did you install
> on
> > > the
> > > > links on the board? (I've missed one a few times before.)
> > > > For me, it's usually something painfully obvious once I see it,
> but
> > > for
> > > > some reason I just can't see it though I've looked at it ten
> times.
> > > > Especially on a single-sided board, make sure all your
> soldering is
> > > OK.
> > > > One weak connection can wreak havoc.
> > > >
> > > >
> > > > Scott Deyo
> > > > The Bridechamber
> > > > contact@
> > > > http://www.bridechamber.com
> > > > Jealous Edison Record Kompany
> > > > http://www.jealousedison.com
> > > >
> > > >
> > > > On Sep 15, 2008, at 1:17 AM, Dave wrote:
> > > >
> > > > > Hi Scott,
> > > > >
> > > > > Thanks for the confirmation about the switch wiring :) I'm
> gonna
> > > > > rewire the Decay an Damper pots too. I've tried various switch
> > > > > setting from all off to individual on to all on and they all
> > > react the
> > > > > same to the resonance pot.
> > > > >
> > > > > Is it possible that the wiring diagram is wrong for the res or
> > > freq
> > > > > pots? The freq pot wiring seems a little strange compared to
> the
> > > rest
> > > > > with the 3 leg of the pot wired to the ferrite bead.
> > > > >
> > > > > While I'm at it how do I wire the VCF CV pot? Do I wire from
> EX to
> > > > > the middle lug of the pot and then from terminal 1 on the pot
> to
> > > the
> > > > > jack?
> > > > >
> > > > > Thanks,
> > > > > Dave
> > > > >
> > > > > --- In cgs_synth@yahoogroups.com, Scott Deyo <contact@> wrote:
> > > > > >
> > > > > > I think Decay and Damper are backwards on the CGS diagram.
> > > > > >
> > > > > > It just occured to me that my panel's envelope pot is
> labeled
> > > wrong!
> > > > > > Instead of 0 to 10, it should read -5 to +5. It should be
> at 0
> > > in
> > > > > the
> > > > > > middle, negative envelope to left, positive to right. Ugh!
> > > > > > : (
> > > > > >
> > > > > > It sounds like you have the switches wired up correctly. Try
> > > > > testing it
> > > > > > with just lowpass on at first, and checking the resonance
> again.
> > > > > >
> > > > > > Cheers,
> > > > > > Scott Deyo
> > > > > > The Bridechamber
> > > > > > contact@
> > > > > > http://www.bridechamber.com
> > > > > > Jealous Edison Record Kompany
> > > > > > http://www.jealousedison.com
> > > > > >
> > > > > >
> > > > > > On Sep 14, 2008, at 11:11 PM, Dave wrote:
> > > > > >
> > > > > > > Hi all,
> > > > > > >
> > > > > > > I just finished building a cynare :) But am having
> problems
> > > with
> > > > > > > the filter section. I am building a kit supplied by
> > > bridechamber
> > > > > > > which has three separate SPDT switches for the filter
> types. I
> > > > > have
> > > > > > > added the 6 pots for the osc and also added the impact gen
> > > mod to
> > > > > it
> > > > > > > too (I subbed in a 100k pot for the 25k for now until I
> can
> > > get
> > > > > the
> > > > > > > 25k pot). These mods seem to work correctly. I also
> changed
> > > the R
> > > > > > > gain resistor to 1.5k instead of the 10k.
> > > > > > >
> > > > > > > I followed the CGS wiring diagram exactly assuming that
> the
> > > pot
> > > > > > > shafts are facing away from me and CW is 3 (I am not sure
> > > about
> > > > > this).
> > > > > > > One strange thing I noticed with this is that the Decay
> and
> > > Damper
> > > > > > > pots seem wired backwards so that as I turn it from 0 to
> 10
> > > the
> > > > > decay
> > > > > > > shortens for both, I would think it should lengthen the
> decay
> > > as
> > > > > you
> > > > > > > turn the pot towards 10. The tone or balance between
> noise and
> > > > > > > shimmer operates correctly.
> > > > > > >
> > > > > > > The problem with the filter is that the filter sweep is
> > > minimal
> > > > > > > in effect, the envelope affects the impact sound
> strangely,
> > > when
> > > > > in
> > > > > > > the middle (5) there is little to no impact sound and
> when at
> > > > > either 0
> > > > > > > or 10 the impact is back (sweeping the impact pot mod
> changes
> > > the
> > > > > > > character of the impact sound). The resonance pot is also
> > > acting
> > > > > very
> > > > > > > strange. I have wired the three switches as best I
> > > > > > > knew how which is took the LP, BP, and HP and wired them
> to
> > > the
> > > > > bottom
> > > > > > > lugs of three switches then I wired some bus wire across
> the
> > > three
> > > > > > > middle lugs of the switches and attached the common wire
> to
> > > that.
> > > > > I
> > > > > > > don't know if that is correct but it makes sense to me.
> When I
> > > > > switch
> > > > > > > between the filter types I can hear changes in tone that
> > > > > corresponds
> > > > > > > to the filter type.
> > > > > > >
> > > > > > > Did I wire the three switches correctly, if not how
> should I
> > > do
> > > > > this?
> > > > > > >
> > > > > > > The main malfunction seems to come from the resonance
> pot. It
> > > does
> > > > > > > not increase the resonance and when I turn it all sound
> going
> > > > > through
> > > > > > > the filter is silenced for about 1-2 seconds and then
> comes
> > > back
> > > > > again
> > > > > > > with no change regardless of whether it is at 0 or 10.
> > > > > > >
> > > > > > > I'm new to the DIY so I don't want to mess with things too
> > > much
> > > > > > > while trouble shooting, so I've gone over the board
> looking
> > > for
> > > > > shorts
> > > > > > > and poor connections but have not found anything yet,
> should
> > > I try
> > > > > > > changing some of the wires around on the res pot or maybe
> the
> > > freq
> > > > > > > pot? I'm confused as to why the decay and damper seem to
> > > operate
> > > > > > > backwards from convention and am wondering if I got these
> > > wired
> > > > > > > backwards maybe I wired the res or freq pots backwards but
> > > I've
> > > > > > > checked over and over again and they match up to kens
> > > diagram...
> > > > > > >
> > > > > > > Sorry for the long post :) Any help would be greatly
> > > appreciated,
> > > > > > >
> > > > > > > Thanks,
> > > > > > > Dave
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > > > [Non-text portions of this message have been removed]
> > > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > > [Non-text portions of this message have been removed]
> > > >
> > >
> > >
> > >
> >
> > [Non-text portions of this message have been removed]
> >
>
>
>

[Non-text portions of this message have been removed]

--- On Mon, 9/15/08, Scott Deyo <contact@...> wrote:
From: Scott Deyo <contact@...>
Subject: Re: [cgs_synth] Re: Cynare filter problem
To: cgs_synth@yahoogroups.com
Date: Monday, September 15, 2008, 8:04 PM











There you go. The round part of the transistor goes towards the BP HP

LP holes.



Scott Deyo

The Bridechamber

contact@bridechambe r.com

http://www.bridecha mber.com

Jealous Edison Record Kompany

http://www.jealouse dison.com



On Sep 15, 2008, at 7:49 PM, Dave wrote:



> I am wondering whether I put the transistors in the right way. I am

> using TO92 style trans that are black plastic with one flat side.

> Right now I have all the 2N2222 and the 2N2907 trans facing the same

> way with the flat part facing up towards the BP HP and LP holes. Is

> this correct?

>

> Thanks,

> Dave

>

> --- In cgs_synth@yahoogrou ps.com, Scott Deyo <contact@... > wrote:

> >

> > The CV pot is wired the way you say, but terminal 3 is also wired to

> > ground. (i.e., it's wired as an 'attenuator' or voltage divider --

> good

> > to remember, they're common).

> >

> > The wiring diagram looks good for freq and res.

> >

> > Everything has the right orientation -- transistors, diode,

> > electrolytics, TL071? The TL071 isn't a TL072? Did you install on

> the

> > links on the board? (I've missed one a few times before.)

> > For me, it's usually something painfully obvious once I see it, but

> for

> > some reason I just can't see it though I've looked at it ten times.

> > Especially on a single-sided board, make sure all your soldering is

> OK.

> > One weak connection can wreak havoc.

> >

> >

> > Scott Deyo

> > The Bridechamber

> > contact@...

> > http://www.bridecha mber.com

> > Jealous Edison Record Kompany

> > http://www.jealouse dison.com

> >

> >

> > On Sep 15, 2008, at 1:17 AM, Dave wrote:

> >

> > > Hi Scott,

> > >

> > > Thanks for the confirmation about the switch wiring :) I'm gonna

> > > rewire the Decay an Damper pots too. I've tried various switch

> > > setting from all off to individual on to all on and they all

> react the

> > > same to the resonance pot.

> > >

> > > Is it possible that the wiring diagram is wrong for the res or

> freq

> > > pots? The freq pot wiring seems a little strange compared to the

> rest

> > > with the 3 leg of the pot wired to the ferrite bead.

> > >

> > > While I'm at it how do I wire the VCF CV pot? Do I wire from EX to

> > > the middle lug of the pot and then from terminal 1 on the pot to

> the

> > > jack?

> > >

> > > Thanks,

> > > Dave

> > >

> > > --- In cgs_synth@yahoogrou ps.com, Scott Deyo <contact@> wrote:

> > > >

> > > > I think Decay and Damper are backwards on the CGS diagram.

> > > >

> > > > It just occured to me that my panel's envelope pot is labeled

> wrong!

> > > > Instead of 0 to 10, it should read -5 to +5. It should be at 0

> in

> > > the

> > > > middle, negative envelope to left, positive to right. Ugh!

> > > > : (

> > > >

> > > > It sounds like you have the switches wired up correctly. Try

> > > testing it

> > > > with just lowpass on at first, and checking the resonance again.

> > > >

> > > > Cheers,

> > > > Scott Deyo

> > > > The Bridechamber

> > > > contact@

> > > > http://www.bridecha mber.com

> > > > Jealous Edison Record Kompany

> > > > http://www.jealouse dison.com

> > > >

> > > >

> > > > On Sep 14, 2008, at 11:11 PM, Dave wrote:

> > > >

> > > > > Hi all,

> > > > >

> > > > > I just finished building a cynare :) But am having problems

> with

> > > > > the filter section. I am building a kit supplied by

> bridechamber

> > > > > which has three separate SPDT switches for the filter types. I

> > > have

> > > > > added the 6 pots for the osc and also added the impact gen

> mod to

> > > it

> > > > > too (I subbed in a 100k pot for the 25k for now until I can

> get

> > > the

> > > > > 25k pot). These mods seem to work correctly. I also changed

> the R

> > > > > gain resistor to 1.5k instead of the 10k.

> > > > >

> > > > > I followed the CGS wiring diagram exactly assuming that the

> pot

> > > > > shafts are facing away from me and CW is 3 (I am not sure

> about

> > > this).

> > > > > One strange thing I noticed with this is that the Decay and

> Damper

> > > > > pots seem wired backwards so that as I turn it from 0 to 10

> the

> > > decay

> > > > > shortens for both, I would think it should lengthen the decay

> as

> > > you

> > > > > turn the pot towards 10. The tone or balance between noise and

> > > > > shimmer operates correctly.

> > > > >

> > > > > The problem with the filter is that the filter sweep is

> minimal

> > > > > in effect, the envelope affects the impact sound strangely,

> when

> > > in

> > > > > the middle (5) there is little to no impact sound and when at

> > > either 0

> > > > > or 10 the impact is back (sweeping the impact pot mod changes

> the

> > > > > character of the impact sound). The resonance pot is also

> acting

> > > very

> > > > > strange. I have wired the three switches as best I

> > > > > knew how which is took the LP, BP, and HP and wired them to

> the

> > > bottom

> > > > > lugs of three switches then I wired some bus wire across the

> three

> > > > > middle lugs of the switches and attached the common wire to

> that.

> > > I

> > > > > don't know if that is correct but it makes sense to me. When I

> > > switch

> > > > > between the filter types I can hear changes in tone that

> > > corresponds

> > > > > to the filter type.

> > > > >

> > > > > Did I wire the three switches correctly, if not how should I

> do

> > > this?

> > > > >

> > > > > The main malfunction seems to come from the resonance pot. It

> does

> > > > > not increase the resonance and when I turn it all sound going

> > > through

> > > > > the filter is silenced for about 1-2 seconds and then comes

> back

> > > again

> > > > > with no change regardless of whether it is at 0 or 10.

> > > > >

> > > > > I'm new to the DIY so I don't want to mess with things too

> much

> > > > > while trouble shooting, so I've gone over the board looking

> for

> > > shorts

> > > > > and poor connections but have not found anything yet, should

> I try

> > > > > changing some of the wires around on the res pot or maybe the

> freq

> > > > > pot? I'm confused as to why the decay and damper seem to

> operate

> > > > > backwards from convention and am wondering if I got these

> wired

> > > > > backwards maybe I wired the res or freq pots backwards but

> I've

> > > > > checked over and over again and they match up to kens

> diagram...

> > > > >

> > > > > Sorry for the long post :) Any help would be greatly

> appreciated,

> > > > >

> > > > > Thanks,

> > > > > Dave

> > > > >

> > > > >

> > > > >

> > > >

> > > > [Non-text portions of this message have been removed]

> > > >

> > >

> > >

> > >

> >

> > [Non-text portions of this message have been removed]

> >

>

>

>



[Non-text portions of this message have been removed]





























[Non-text portions of this message have been removed]

On Sep 18, 2008, at 2:26 AM, sasami@... wrote:

> >not to beat a dead horse, but i am currently building the cynare, and
> >the datasheet i have seems to contradict this advice. i'm not really
> >in the mood to screw it up. ;)
>
> PN devices traditionally have the CBE order in reverse to the 2N
> devices.
> Occasionally you will find a manufacturer who does things backwards
> though.
> If I was installing a generic PN2222 on one of my Cynare PCBs, I
> would have
> the round part of the transistor towards the nearer edge of the PCB.
>
> I have not looked at the datasheet as this machine doesn't work with
> direct
> linked pdfs.
>
> Ken
>
> >
> >
> >
> >http://www.onsemi.com/pub_link/Collateral/P2N2222A-D.PDF
> >
> >
> >
> >am i missing something? did i get the wrong transistor? or is it
> just
> reversed from most of the 2n2222s?
> >
> >Kendall
> >
> __________________________________________________________
> Ken Stone sasami@...
> Modular Synth PCBs for sale <http://www.cgs.synth.net/>
> Australian Miniature Horses & Ponies
> <http://www.blaze.net.au/~sasami/>
>
>
>

[Non-text portions of this message have been removed]