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bronti23
Joined: Feb 29, 2008
Posts: 1
Location: Austria
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 Posted: Fri Feb 29, 2008 2:32 am Post subject:
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| 2 for me ..........thanks |
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vtl5c3
Joined: Sep 08, 2006
Posts: 425
Location: PDX
Audio files: 13
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| Posted: Sat Mar 01, 2008 7:33 pm Post subject:
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You could try putting a switch across the charge capacitor, like a JFET maybe... Not sure how well that would work. I think the Korg MonoPoly LFO's reset was done that way.
| fonik wrote: | | sound wrote: | | Is it possible to add a gate to the LFO ? I mean restart the cycle with a pulse or trigg. |
this is a very simple LFO. i wouldn't know where to insert the sync signal. in fact i would have to do some research on this matter (which oscillator core is syncable and how?)... |
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prophei
Joined: Jan 27, 2007
Posts: 234
Location: san francisco, ca
Audio files: 4
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| Posted: Sat Mar 01, 2008 10:48 pm Post subject:
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| 1 for me, thank you! |
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/mr
Joined: Aug 05, 2007
Posts: 223
Location: Elektron City, Sweden
Audio files: 1
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Photon
Joined: Mar 22, 2005
Posts: 363
Location: Boston
Audio files: 1
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| Posted: Sun Mar 02, 2008 11:30 am Post subject:
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Sounds great. Count me in for 1.
Peter |
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chriswilliams
Joined: May 17, 2005
Posts: 17
Location: Perth, Western Australia
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| Posted: Sun Mar 02, 2008 6:24 pm Post subject:
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Please count me in for 2 - thanks for doing a re-run, as I missed the first!  |
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Mon Mar 03, 2008 2:13 am Post subject:
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i received enough advance-orders for a 2nd run according to our Recommendations for PCB offers on electro-music. again thank you all for your interest, i am truly overwhelmed.
I'LL TAKE ORDERS UNTIL Fri 7 MAR 08 13:00 UTC
i'll send the files to the manufacturer then. it will take two more weeks to the PCBs arrival and then i will have to populate and test one. if the PCBs are fine i will PM you concerning payment (paypal preferred). if not, i will have some realy nice and fancy beermats  ) anticipated date of delivery is last week of march.
the new documentation will hopefully be done this week.
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cheers,
matthias
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Mon Mar 03, 2008 6:27 am Post subject:
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everyone who contacted me so far (using PM, email or post in the thread) is put on the list. i just wanted to let you know, that i have not had the time to PM everyone who placed an order yet.
i will confirm your orders the next days.
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cheers,
matthias
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Big Boss at fonitronik
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norman phay
Joined: Jun 29, 2007
Posts: 176
Location: North-East England
Audio files: 1
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| Posted: Mon Mar 03, 2008 11:43 am Post subject:
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If you could bung me down for a couple of these as well, Matthias, that would be great.
Many thanks. |
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Mon Mar 03, 2008 11:46 am Post subject:
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| Norman Phay wrote: | If you could bung me down for a couple of these as well, Matthias, that would be great.
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the privilege and pleasure is mine...
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matthias
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Big Boss at fonitronik
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vtl5c3
Joined: Sep 08, 2006
Posts: 425
Location: PDX
Audio files: 13
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| Posted: Mon Mar 03, 2008 12:26 pm Post subject:
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Has anyone modded their PS3100 clone so that:
- Each filter stage has its own audio output?
- All filter stages can be controlled by one CV? |
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/mr
Joined: Aug 05, 2007
Posts: 223
Location: Elektron City, Sweden
Audio files: 1
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| Posted: Mon Mar 03, 2008 12:33 pm Post subject:
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| vtl5c3 wrote: | Has anyone modded their PS3100 clone so that:
- Each filter stage has its own audio output?
- All filter stages can be controlled by one CV? |
I surely will, when it arrives. 
All good mods like these would be interesting to hear about. |
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vtl5c3
Joined: Sep 08, 2006
Posts: 425
Location: PDX
Audio files: 13
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| Posted: Mon Mar 03, 2008 1:04 pm Post subject:
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Looking at the schematic, the three individual outputs are easy to do: just add a 1K resistor to each filter opamp's output (i.e. where the left side of the 10K resistor connects on the schematic).
This would be a nice mod since it would allow panning each filter section in a different part of the stereo field.
I think that for the summed CV input, you should be able to just add another 270K resistor to the base of each NPN transistor (Q1, Q3 and Q5) and connect the other ends of the resistors to an (attenuated) input jack. I think that this is how the MOTM 410 does it. |
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Mon Mar 03, 2008 1:34 pm Post subject:
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| vtl5c3 wrote: | Has anyone modded their PS3100 clone so that:
<snip>
- All filter stages can be controlled by one CV? |
if you take a look at the building docs you will see that i just used and recommended switching jack sockets (kind of multiple). actually each filter stage has it's own cv in. you can achieve different options by different wiring...
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matthias
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vtl5c3
Joined: Sep 08, 2006
Posts: 425
Location: PDX
Audio files: 13
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| Posted: Mon Mar 03, 2008 2:50 pm Post subject:
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Ah. you're right. I see it now. Very clever!
| fonik wrote: | | vtl5c3 wrote: | Has anyone modded their PS3100 clone so that:
<snip>
- All filter stages can be controlled by one CV? |
if you take a look at the building docs you will see that i just used and recommended switching jack sockets (kind of multiple). actually each filter stage has it's own cv in. you can achieve different options by different wiring... |
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Mon Mar 03, 2008 3:48 pm Post subject:
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| vtl5c3 wrote: | | Ah. you're right. I see it now. Very clever! |
all credits go to Scott Stites, the master of switching jack sockets!
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matthias
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Big Boss at fonitronik
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Tue Mar 04, 2008 7:41 am Post subject:
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everyone who placed an advance order should have received a PM, now. check your PM inbox. i just wanted to let you know that i received your order and put you on the list. you don't have to reply these PMs unless the info is not correct.
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matthias
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Fri Mar 07, 2008 12:54 am Post subject:
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last call...
(i will order some spare PCBs anyway).
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matthias
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Fri Mar 07, 2008 6:31 am Post subject:
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PCBs ordered.
i am still taking advance orders since i ordered a view spares...
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matthias
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Mon Mar 17, 2008 4:42 am Post subject:
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FYI
manufacturer shipped the PCBs. they will hopefully arrive before easter.
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matthias
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emmaker
Joined: Aug 10, 2007
Posts: 12
Location: Portland, OR
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| Posted: Mon Mar 17, 2008 3:25 pm Post subject:
Reserved 3? |
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Matthias,
Either on the 6th or 7th tried PM a request for 3 units. Do not know if it went through or not.
So I'd like to reserve 3 if they have not already done so.
Thanks much.
Jay S./emmaker |
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ericcoleridge
Joined: Jan 16, 2007
Posts: 889
Location: NYC
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| Posted: Mon Mar 17, 2008 11:37 pm Post subject:
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I was wondering if anyone has tried to build this circuit with different frequency ranges, like a small filter bank/graphic equalizer? Would this be a worthwhile pursuit?
What do you think Matthias? Is this a pointless idea?
I guess it would be a matter of changing capacitor values on each stage, and then perhaps taping the individual outputs. But I'm not sure how one would go about calculating (roughly) the values of each cap/stage in order to produce various frequency bands/ranges. |
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Tue Mar 18, 2008 12:01 am Post subject:
Re: Reserved 3? |
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| emmaker wrote: | Matthias,
Either on the 6th or 7th tried PM a request for 3 units. Do not know if it went through or not.
So I'd like to reserve 3 if they have not already done so.
Thanks much.
Jay S./emmaker |
it didn't went through!? anyways, i put you down for 3 PCBs now.
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matthias
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fonik
Joined: Jun 07, 2006
Posts: 3950
Location: Germany
Audio files: 23
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| Posted: Tue Mar 18, 2008 12:08 am Post subject:
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| ericcoleridge wrote: | I was wondering if anyone has tried to build this circuit with different frequency ranges, like a small filter bank/graphic equalizer? Would this be a worthwhile pursuit?
What do you think Matthias? Is this a pointless idea?
I guess it would be a matter of changing capacitor values on each stage, and then perhaps taping the individual outputs. But I'm not sure how one would go about calculating (roughly) the values of each cap/stage in order to produce various frequency bands/ranges. |
i don't think it's worth it (just my two pence). they already provide variable center frequency. the three filters are voltage controlled using vactrols. that's the clue and it would be a very expensive solution for a filter bank.
for a smaller fixed filter bank i'd used a simpler circuit. you may want to take a look at analog devices interactive filter designer tool:
http://www.analog.com/Analog_Root/static/techSupport/designTools/interactiveTools/filter/filter.html
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matthias
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/mr
Joined: Aug 05, 2007
Posts: 223
Location: Elektron City, Sweden
Audio files: 1
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| Posted: Tue Mar 18, 2008 5:03 am Post subject:
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| ericcoleridge wrote: | | I was wondering if anyone has tried to build this circuit with different frequency ranges, like a small filter bank/graphic equalizer? Would this be a worthwhile pursuit? |
A graphic eq doesn't make much sense, as the resonator is more similar to a parametric eq. But it would be very interesting to add some adjustable parameters like Q and boost/cut to the circuit - and turn it into a voltage controlled parametric eq. I'll definitely look into these possibilities.
Regarding frequency ranges, try with different capacitor values. I can't find the formulas for this particular BPF configuration, but... if somebody has them or calculates them, please shout. |
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