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2006-11-10 by bbluthang
--- In cgs_synth@yahoogroups.com , ken johnston wrote: > > I have. Did not make any difference I could hear, and I have good ears, cheers, Guess i'll stick to the cheap old trannies i always use :-0 @ > I swear. > > bbluthang wrote: > > > > > > > If you want to experiment, I do h
2006-11-10 by ken johnston
I used germanium diodes, I mean, not leds. Actually, I used leaky, sadly-good-for-nothing-else OC44 germanium transistors as diodes to replace the 1N4148s in my functioning Synthacon filter. No diff. That being said...I did use the OC44s as diodes to some effect in salvaging the
2006-11-09 by ken johnston
I have. Did not make any difference I could hear, and I have good ears, I swear. bbluthang wrote: > > > > If you want to experiment, I do have quite a pile of germanium > > transistors. Shipped anywhere, no charge. > > > Has anybody tried Ge transistors in the steiner?? > any dif
2006-11-09 by Ian Maltby
Keeping with the guitar FX theme, the easiest although possibly not the best way to fix the scratchy pot is to use the gain setup from a fuzzface. Instead of wiring the resonance pot as variable resistor wire the 2 outer lugs to the board. Then wire a large electolytic cap, I use
2006-11-09 by mrboningen
my synthacon filter (purchased pre-built by metalbox in frac rack format) also does this. i asked michael ford of metalbox if he could fix it for me, so hopefully he's gonna try. so, what IS the fix? --- In cgs_synth@yahoogroups.com , Charles Stella wrote: > > Yes indeed. I repla
2006-11-09 by Laurie Biddulph
In collaboration with Ken I am releasing a suite of EuroRack compatible boards for the CGS family. By implication that means they will comfortably fit in to FracRack panels Best Regards (Mr) Laurie Biddulph Mobile: 0400 257 645 Elby Designs ABN: 70 022 727 605 http://www.elby-des
2006-11-09 by sasami@hotkey.net.au
>also, with the euro version, could one replace the diode strings with >leds and put them on the panel? No. There simply isn't enough current through them for them to light. Even high efficiency LEDs (2mA) aren't bright enough for the effort. Ken _________________________________
2006-11-09 by bbluthang
> > If you want to experiment, I do have quite a pile of germanium > transistors. Shipped anywhere, no charge. > Has anybody tried Ge transistors in the steiner?? any difference? also, with the euro version, could one replace the diode strings with leds and put them on the panel?
2006-11-09 by Gerald Stevens
Do me a favor and watch the output on a scope while you turn the knob. My problem with my CGS steiner filter sounds like a "scratchy pot" to the ear, but is pretty obviously due to some kind of DC component when you look at it on a scope. Could be inherent in the original design.
2006-11-09 by Charles Osthelder
The fix is to replace the pot with a resistor or two and then isolate the pot from the collector current with a cap. That really does defeat the design, however. The idea was to set up the transistor gain how you want through the collector (with the pot) rather than simply thrott
2006-11-08 by bbluthang
Hi > > Do I connect one 10n to the +15v & 0v, then connect the other 10n to the -15v & 0v ? That's what I gathered from other circuit diagrams, but I wanted to be sure... > Yes (I haven't got the PCB in front of me, but thats what decoupling caps do) > Also, when a circuit diagra
2006-11-08 by data2action
this is too cool. my main rig is fracrack and is stuffed w/ CGS modules... my _only_ niggling complaint has been the long skinny layout of some of the PCBs... mounting those perpendicular to the panal makes for some deep modules and less-than-secure mechanix... this is a definate
2006-11-08 by Charles Stella
Yes indeed. I replaced the pot twice. Glad to hear it's something else. I'll give the mod a try. Thanks On Nov 8, 2006, at 12:07 AM, Jason Proctor wrote: > it happens on charles's synthacon as well, and AFAWCS, it's not a > pot issue. > > > Hey that happens on my Synthacon too! K
2006-11-08 by Andrew Scheidler
On the Simple Wave Folder (Lockhart) parts list there are two 10n caps listed. They are not shown on the front of the PCB, but on the back, next to the power connection, it shows "10n" near the +15 and the -15 hole. Do I connect one 10n to the +15v & 0v, then connect the other 10
2006-11-08 by Ken Johnston
Isn't the Synthacon res pot is like the boost control on the Dallas Rangemaster treble boosters for guitar? From the GEOFEX site, regarding this: "Another quirk of the original is that there is a DC voltage across the volume control, which also serves as the collector load resist
2006-11-08 by Scott Deyo
Hi all, The metal fabricators have started work, and the Steiner is included in this run. Since I use the Resonance knob so much on mine, I added VC via one of my VC Resistor boards. My News page on the site should be updated soon, as well as the VCR page, which will have a lot o
2006-11-08 by sasami@hotkey.net.au
Pots with even a slightly dusty surface will cause scratchy sounds when there is DC running through them, as apparently there is. Takada's variant has a slightly different resonance circuit, with a 68uF in series with the pot, and a fixed resistor across both to deal with the DC
2006-11-08 by wasubot
Yes same here. I found reference to this in the archives and thats where 'alison projects' idea came from. Not sure who the person was who tried it but i think they never reported back if it worked or not. It is not the pot i know that much for sure because other people here trie
2006-11-08 by Jason Proctor
it happens on charles's synthacon as well, and AFAWCS, it's not a pot issue. > Hey that happens on my Synthacon too! Kinda strange. I have been planning >on changing that pot for a while now.
2006-11-08 by Louis van Dompselaar
Same here! There must be something going on here... > Hey that happens on my Synthacon too! Kinda strange. I have been planning > on changing that pot for a while now.
2006-11-08 by Pete
Hey that happens on my Synthacon too! Kinda strange. I have been planning on changing that pot for a while now. -- http://www.myspace.com/23isgood [Non-text portions of this message have been removed]
2006-11-08 by Laurie Biddulph
Unfortunately both FrakRack and MOTM have been exclusively assigned to others so I am unable to move in to those formats for CGS although I had planned on that originally. Best Regards (Mr) Laurie Biddulph Mobile: 0400 257 645 Elby Designs ABN: 70 022 727 605 http://www.elby-desi
2006-11-08 by wasubot
Hey Laurie, Thats excellent news. WIll you only be offering eurorack panels or also motm size ones? On 11/8/06, Laurie Biddulph elby_designs@... > wrote: > > I will be supplying fully assembled EuroRack versions of this and other > CGS > modules soon and will offer front panels w
2006-11-08 by Laurie Biddulph
I will be supplying fully assembled EuroRack versions of this and other CGS modules soon and will offer front panels with kits Best Regards (Mr) Laurie Biddulph Mobile: 0400 257 645 Elby Designs ABN: 70 022 727 605 http://www.elby-designs.com This e-mail and any files transmitted
2006-11-08 by Jason Proctor
the paragraph beginning "When the Loop/Hold switch is set to "Hold"" has all the goodies :-) >At 11:05 PM 11/7/2006, scottnoanh@... wrote: >> > Oh! [blush] I'll need to *read* that article. I just assumed that it >> > was a typical 4017-based sequencer. >> >>Typical? Sir, this is
2006-11-08 by John Mahoney
At 11:05 PM 11/7/2006, scottnoanh@... wrote: > > Oh! [blush] I'll need to *read* that article. I just assumed that it > > was a typical 4017-based sequencer. > >Typical? Sir, this is the CGS list. Drop and give me 20. Well, I had assumed that "expandable" meant that you could add
2006-11-08 by scottnoanh@peoplepc.com
> Oh! [blush] I'll need to *read* that article. I just assumed that it > was a typical 4017-based sequencer. Typical? Sir, this is the CGS list. Drop and give me 20. =0) Cheers, Scott
2006-11-08 by Gerald Stevens
A question I've been meaning to ask about the old design. When I adjust the resonance, there is a large, slow DC offset that tracks the knob turn then drifts back to zero causing some nasty clipping if I turn it too fast. I believe it has to do with the 10uF AC coupling cap at th
2006-11-08 by John Mahoney
At 05:56 PM 11/7/2006, you wrote: > >Yeah, but you also need extra logic to chain them together. It's not > >rocket science, but it means another board, not to mention more time > >at the breadboard. > >Go read the article again. There is no need of extra logic. The thing is >DES
2006-11-08 by sasami@hotkey.net.au
>(No CV mixer op amp?) I wanted to keep some of the original flavor! >Inverting output buffer. Input buffers are inverting too, so "it all comes out in the wash". >Ken, are any of these changes worth doing as a modification to the old >circuit? I am wondering about the additional
2006-11-07 by John
Has somebody designed a panel that this will fit in? regards, John On 11/7/06 4:45 PM, " sasami@... " sasami@... > wrote: > I've just uploaded details of a new Euro-rack version of the Steiner VCF. > Check it out. > > Ken > ________________________________________________________
2006-11-07 by Richard Brewster
Nice input buffers! (No CV mixer op amp?) The changes in the filter circuit are interesting! Twelve diodes. A CV reject trimmer. 2N3904 and 2N3906 transistors instead of the 2N2222 and 2N2907. Inverting output buffer. Ken, are any of these changes worth doing as a modification to
2006-11-07 by The Alison Project
Now with the Steiner in the limelight again with the new Euro board, my Synthacon has a scratchy res pot, very noticeable in lowpass mod, i have tried adding a 10uf cap in series with the pot which gets rid of the scratchy pot, but also the sound. I have replaced the pot 4 times.
2006-11-07 by Jay
sasami@... wrote: > I've just uploaded details of a new Euro-rack version of the Steiner VCF. > Check it out. Awesome! Now someone just needs to draw up a FPD panel for it...
2006-11-07 by sasami@hotkey.net.au
>Yeah, but you also need extra logic to chain them together. It's not >rocket science, but it means another board, not to mention more time >at the breadboard. Go read the article again. There is no need of extra logic. The thing is DESIGNED to cascade. Ken ______________________
2006-11-07 by sasami@hotkey.net.au
>Is there a (somewhat reasonably straightforward) way to build the Gate Sequencer so that it has 12 steps instead of 8 ? > >I realize you could build two of them, then link them together to get 16, but short of doing that, is there any possibility? Building and cascading two is t
2006-11-07 by John Mahoney
At 05:22 PM 11/7/2006, you wrote: >easiest way of getting >8 steps is to hide two gate sequencer PCBs >behind 1 panel. 1 big panel will probably only be 1.5x the cost of 2 >smaller ones, and the PCB itself is *cheap* to populate. Yeah, but you also need extra logic to chain them
2006-11-07 by John Mahoney
At 05:06 PM 11/7/2006, Andrew Scheidler wrote: >Yeah, with 3 bits making 8 steps... is there a substitutable device >that can count higher? Well, Ray Wilson's got a 16-step sequencer: http://www.musicfromouterspace.com/analogsynth/SEQ16_2005/SEQ16_2005.html Thomas Henry's SuperSe
2006-11-07 by Jason Proctor
3 bits? i think that's the sequential switch module. the gate sequencer is straight 4017 johnson. easiest way of getting >8 steps is to hide two gate sequencer PCBs behind 1 panel. 1 big panel will probably only be 1.5x the cost of 2 smaller ones, and the PCB itself is *cheap* to
2006-11-07 by Andrew Scheidler
Yeah, with 3 bits making 8 steps... is there a substitutable device that can count higher? Also, I'm looking at using LED lighted pushbuttons (instead of mechanical switches) on my GS, and they require 3volts to power the LED. Is there a place in the existing GS circuit where the
2006-11-07 by John Mahoney
At 03:37 PM 11/7/2006, Andrew Scheidler wrote: >Is there a (somewhat reasonably straightforward) way to build the >Gate Sequencer so that it has 12 steps instead of 8 ? > >I realize you could build two of them, then link them together to >get 16, but short of doing that, is there
2006-11-07 by sasami@hotkey.net.au
I've just uploaded details of a new Euro-rack version of the Steiner VCF. Check it out. Ken _______________________________________________________________________ Ken Stone sasami@... Modular Synth PCBs for sale http://www.blaze.net.au/~sasami/synth/ > Australian Miniature Horse
2006-11-07 by sasami@hotkey.net.au
Those wanting to buy boards for Christmas holidays would be advised to think about doing so now. During December and January, the postal system becomes rather clogged. Also, PCB manufacturing during this period is not possible, so some boards may be out of stock for a while. I wi
2006-11-07 by Andrew Scheidler
Is there a (somewhat reasonably straightforward) way to build the Gate Sequencer so that it has 12 steps instead of 8 ? I realize you could build two of them, then link them together to get 16, but short of doing that, is there any possibility? Andrew
2006-11-07 by bbluthang
Hi Welcome! > counting all my components ive noticed that two caps the 100n's are > totally left out of the schematic unless im continully over looking > them. the caps are not shown on the schematic, if you look at the pic of the PCB you will see them. The 100n caps are for deco
2006-11-05 by kidkrazy58
Hi im new to this group and i joined it cause i really like these modules. My question is that i have completley prototyped the drum simulator on my bread board and now im trouble-shooting it. After counting all my components ive noticed that two caps the 100n's are totally left
2006-11-05 by The Alison Project
thanks ken ----- Original Message ----- From: sasami@... To: cgs_synth@yahoogroups.com Sent: Sunday, November 05, 2006 2:39 AM Subject: Re: [cgs_synth] Cynare VCF Volume question That will give you 10 times the signal strength. If it isn't distorting, you are fine. In otherwords,
2006-11-05 by sasami@hotkey.net.au
That will give you 10 times the signal strength. If it isn't distorting, you are fine. In otherwords, if it sounds okay, it is okay. Ken >My Cynare has a very low volume output when I use the VCF, changing the R-Gain resistor from 10K to 1K gives me a more desired volume output.
2006-11-05 by The Alison Project
My Cynare has a very low volume output when I use the VCF, changing the R-Gain resistor from 10K to 1K gives me a more desired volume output. For those who know what they are doing, can this cause any problems in the circuit, thanks. Chris [Non-text portions of this message have
2006-11-04 by stiebz
> When you say 1.1 volts, is this DC or is it oscillating? It's 1.1 VDC between pin6 & 0V If I measure AC voltage with my (cheap) multimeter is shows 0 VAC ?? So I presume it would be best to replace the CA3140 & the MPF102. thanks, steven --- In cgs_synth@yahoogroups.com , "djbr