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Funky40
Joined: Sep 24, 2005 Posts: 875 Location: Swiss
Audio files: 1
G2 patch files: 5
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Posted: Wed Jun 06, 2007 7:16 am Post subject:
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Etaoin wrote: | Well, a single module looks a lot better than a whole range of them. I cut the panels by hand, so when you combine a number of them, it starts looking messy... |
those DIY Systems have a Charme, Systems from Stock don't have for me.
Your one is very nice.
Hopefully it sounds also like this |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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prophei
Joined: Jan 27, 2007 Posts: 234 Location: san francisco, ca
Audio files: 4
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Posted: Thu Jun 07, 2007 11:21 am Post subject:
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sounds glorious! |
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bambam
Joined: Feb 20, 2007 Posts: 60 Location: australia
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Posted: Sun Jun 17, 2007 8:26 pm Post subject:
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Hi Matthias
Well after some delays i'm finally building my ps3100 i wanted to confirm that where it has R31 listed twice in the past list as a 10K res it shold be r31 and r32? i'm sure it is but figured i'd check. I have looked through the posts but couldnt find mention of this.
cheers
Brett |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sun Jun 17, 2007 10:51 pm Post subject:
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bambam wrote: | Hi Matthias
Well after some delays i'm finally building my ps3100 i wanted to confirm that where it has R31 listed twice in the past list as a 10K res it shold be r31 and r32? i'm sure it is but figured i'd check. I have looked through the posts but couldnt find mention of this.
cheers
Brett |
that's correct. in general follow the schematic. the schematic is the source for the BOM, which was edited afterwards and therefore has errors (hope you found the onlyone...). thank you very much for pointing this... _________________
cheers,
matthias
____________
Big Boss at fonitronik
Tech Buddy at Random*Source |
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bambam
Joined: Feb 20, 2007 Posts: 60 Location: australia
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Posted: Sun Jun 17, 2007 11:58 pm Post subject:
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thanks matey, i figured as much but its nice to have confirmation |
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bambam
Joined: Feb 20, 2007 Posts: 60 Location: australia
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Posted: Sat Jun 30, 2007 10:00 pm Post subject:
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Hi Matthias
Just powered on my completed board last night and wow its amazing, such a smooth lush sound
I was about to do my panel but have seen reference here and there of a LFO speed range switch, is there any doco around on it? Because i found mine is fairly slow even at the highest speed. It is capable of amazingly slow sweeps which i want to retain but i'd love to be able to switch into a differnt mode and get very fast if possible.
I was thinking its the poly cap right next to the tl072 in the LFO section that determines the speed but wasnt sure how to work out a mod to maybe switch to a different value cap.....i have a 330n cap there by the way.
I did also want to check is it meant to be LIN pots all the way through or should some by LOG?
Anyway it sounds great already so well done on the design
Brett |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sun Jul 01, 2007 5:03 am Post subject:
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bambam wrote: | Hi Matthias
Just powered on my completed board last night and wow its amazing, such a smooth lush sound |
nice to hear, brett.
Quote: | I was about to do my panel but have seen reference here and there of a LFO speed range switch, is there any doco around on it? Because i found mine is fairly slow even at the highest speed. It is capable of amazingly slow sweeps which i want to retain but i'd love to be able to switch into a differnt mode and get very fast if possible.
I was thinking its the poly cap right next to the tl072 in the LFO section that determines the speed but wasnt sure how to work out a mod to maybe switch to a different value cap.....i have a 330n cap there by the way. |
there is nothing fancy about that. it only needs a SPST on-off-on switch, two additional caps and some wiring. the smaller the capacitance, the faster the LFO. so you choose the smallest cap you want for that C16. then you wire the two additional caps in parallel, selectable by the switch like in this picture (here it is ken stones utility LFO). try different values and see what satisfies you the most:
Quote: | I did also want to check is it meant to be LIN pots all the way through or should some by LOG? |
i am quite happy with the linear ones.
the mix pot is modded to a centered audio pot by the resistors in parallel and this mix section is the weakest point of this design anyway (just tried to keep it close to the original design).
don't forget to show us the finished module. i am more than curious to see the things people built from this PCB, just because i never did something like this before. _________________
cheers,
matthias
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Big Boss at fonitronik
Tech Buddy at Random*Source |
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krisp14u
Joined: Nov 11, 2006 Posts: 206 Location: uk
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sun Jul 01, 2007 7:27 am Post subject:
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krisp14u wrote: | got 2 pcbs up and running so i'm going to get 2 MOTM face plates made up |
is it a schaeffer? did you use hpgl for the scales? if you do, you will spare some money, i bet. _________________
cheers,
matthias
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Big Boss at fonitronik
Tech Buddy at Random*Source |
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prophei
Joined: Jan 27, 2007 Posts: 234 Location: san francisco, ca
Audio files: 4
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Posted: Sun Jul 01, 2007 8:46 am Post subject:
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fonik,
have you been convinced to do any more pcb's of this yet? |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sun Jul 01, 2007 9:02 am Post subject:
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prophei wrote: | fonik,
have you been convinced to do any more pcb's of this yet? |
i probably will ask again end of this year. now i stuck in this super controller i can't force to work... _________________
cheers,
matthias
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Big Boss at fonitronik
Tech Buddy at Random*Source |
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mosc
Site Admin
Joined: Jan 31, 2003 Posts: 18195 Location: Durham, NC
Audio files: 211
G2 patch files: 60
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Posted: Sun Jul 01, 2007 9:31 am Post subject:
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For everyone's info, we generally discourage cross posting but this kind of cross linking is excellent. Thanks. It helps the general usefulness of the forum tremendously. _________________ --Howard
my music and other stuff |
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krisp14u
Joined: Nov 11, 2006 Posts: 206 Location: uk
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bambam
Joined: Feb 20, 2007 Posts: 60 Location: australia
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Posted: Sun Jul 01, 2007 5:33 pm Post subject:
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Thanks heaps Matthias
That diagram was the same one i was looking at on kens site so thanks for confirming its the right way to go. I pretty mush had assumed that i'd need an extra switch so when drilling the panel out i made a space for it.
I'lll derfinitely take some pictures to post when its done, i'm mounting mine into a double width dot com blank and it fits really well.
I did notice my mix pot seems to be a good curve until right at the end of the wet side when it suddenly cuts alot of the original audio except for what the resonator lets through but from what i've read etc thats kind of normal yeah?
I am loving the module though and will be building the second one soon i think I have noticed its not that great on bassy sounds or bass drums etc but seems to excel on noise based stuff or strings etc
When adjusting the trimmers i basically set them so when the freq pots were at there lowest setting the LED had just gone out is that pretty much the way to do it?
Anyway big thumbs up for a great design.
Brett |
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bambam
Joined: Feb 20, 2007 Posts: 60 Location: australia
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Posted: Sun Jul 01, 2007 6:25 pm Post subject:
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Sorry forgot to ask with the LFO speed switch is the value in the doco of 220n the lowest value i can use for the LFO? or can i go lower to get an even faster lfo or am i wasting my time because 220n is already very fast?
Cheers
Brett |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Sun Jul 01, 2007 11:55 pm Post subject:
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bambam wrote: | I did notice my mix pot seems to be a good curve until right at the end of the wet side when it suddenly cuts alot of the original audio except for what the resonator lets through but from what i've read etc thats kind of normal yeah? |
as said before this is the weakest part of the design. you may want to try different values for R14/R15...
Quote: | When adjusting the trimmers i basically set them so when the freq pots were at there lowest setting the LED had just gone out is that pretty much the way to do it? |
that's the way i do it. nevertheless you could set it up different: set higher initial with the trimemrs and use higher values for R39-41.
Quote: | Sorry forgot to ask with the LFO speed switch is the value in the doco of 220n the lowest value i can use for the LFO? or can i go lower to get an even faster lfo or am i wasting my time because 220n is already very fast? |
try different values. with 2.2n you should be in the audible range. 47n would be very fast i guess... try different values and choose by liking.
i wanted a very slow LFO for a subtle change over time as the effect of this module is rather smooth and subtle anyway, IMO. _________________
cheers,
matthias
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Big Boss at fonitronik
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Sun Jul 01, 2007 11:59 pm Post subject:
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Quote: | as said before this is the weakest part of the design. you may want to try different values for R14/R15... |
Did you ever try the dual pot that was in one of the PS3100 designs? _________________ http://www.casia.org/modular/ |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Mon Jul 02, 2007 12:07 am Post subject:
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Etaoin wrote: | Quote: | as said before this is the weakest part of the design. you may want to try different values for R14/R15... |
Did you ever try the dual pot that was in one of the PS3100 designs? |
no, i didn't. maybe i should have done this. the best solution would have been to use a reversed panning circuit built around an additional dual OPA. if i should ever do a 2nd run i would modify the PCB in that way.
anyway, i am happy with it as it is (actually i am never using the mixer pot. i always use the wet signal only ). _________________
cheers,
matthias
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Big Boss at fonitronik
Tech Buddy at Random*Source |
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etaoin
Joined: Jun 30, 2005 Posts: 761 Location: Utrecht, NL
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Posted: Mon Jul 02, 2007 12:08 am Post subject:
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Quote: | (actually i am never using the mixer pot. i always use the wet signal only ). |
Same here... _________________ http://www.casia.org/modular/ |
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krisp14u
Joined: Nov 11, 2006 Posts: 206 Location: uk
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Posted: Mon Jul 02, 2007 12:22 am Post subject:
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fonik wrote: |
hi all,
i just couldn't resist and edited pauls great motm panel. i was able to lower the cost by about 10%: |
Hay Cheers Fonik
putting the text in 1 block saves a lot of money .
I will have to try this trick on other panels i'm doing
paul D _________________ Cheers
Paul Darlow
www.krisp1.com |
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fonik
Joined: Jun 07, 2006 Posts: 3950 Location: Germany
Audio files: 23
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Posted: Mon Jul 02, 2007 12:27 am Post subject:
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krisp14u wrote: |
putting the text in 1 block saves a lot of money .
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obviously the software calculates by objects and then by size of these objects, where letters are the unit for size of text objects.
(that applies to graphic objects too, thus we can spare some bucks by using HPGL-diles.) _________________
cheers,
matthias
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Big Boss at fonitronik
Tech Buddy at Random*Source |
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bambam
Joined: Feb 20, 2007 Posts: 60 Location: australia
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Posted: Mon Jul 02, 2007 12:34 am Post subject:
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Thanks for the info again
I will definitely keep the 330n or even go higher as i love the slow sweeps this is capable of and agree this module excels at it.
I'll play around and post the values i end up using.
I'm not too stressed about the mix pot either as i always use it at fully wet or just slightly less so its no big problem
Cheers
Brett |
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