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2005-08-18 by sasami@hotkey.net.au
Delete the resistor with a * next to it. Wire the pot between the terminals marked A and B, which a right near the resistor with the * next to it. Ken >on the dc mixer module instructions for having a output level pot is >in relation to the old pcb. my limited understanding can't
2005-08-18 by sasami@hotkey.net.au
>What kind of waveshape should I see at the Pulse output? On mine it's a very skinny pulse, >almost more of a trigger. Does that sound correct? If you are referring to the pulse out from the LM3900, yes. >All in all I really like this VCO. The stair output is a lot of fun to play
2005-08-18 by mesonproductions
on the dc mixer module instructions for having a output level pot is in relation to the old pcb. my limited understanding can't convert this to the new pcb. so, what do I need to do to connect a pot for output level ( on the dc mixer)---------this is for controlling the all out l
2005-08-18 by mesonproductions
directly next to where the beads go on the cgs30 pcb, theres a link. i'm stacking a bunch of bandwidth filters and are wondering whether it is necessary to make the link on each of the lower stacked pcb's. As for the top pcb, where a wire runs from one of the holes of the link to
2005-08-18 by vtl5c3
What kind of waveshape should I see at the Pulse output? On mine it's a very skinny pulse, almost more of a trigger. Does that sound correct? All in all I really like this VCO. The stair output is a lot of fun to play with. The pulse output is also interesting when the CVS input
2005-08-18 by sasami@hotkey.net.au
There are probably 1 extra of 10k and 100k because mys software deosn't know the difference between a trimmer and a resistor, and I failed to notice it while putting the parts list together. 100n -yes, there are 8. No 10p either. The PCB is correct. Ken >Hi. >Fisrt: what is a 0,1
2005-08-17 by brett x
Hi Bob Don't know about the component numbers as i dont have my pcb with me. the 0.156 connector you ask about though is the same as the MOTM power connectors. have a look here for info http://www.jaycar.com.au/productView.asp?ID=HM3444&CATID=&keywords=0%2E156&SPECIAL=&form=KEYWO
2005-08-17 by brett x
Hi Bob Don't know about the component numbers as i dont have my pcb with me. the 0.156 connector you ask about though is the same as the MOTM power connectors. have a look here for info http://www.jaycar.com.au/productView.asp?ID=HM3444&CATID=&keywords=0%2E156&SPECIAL=&form=KEYWO
2005-08-17 by boward_k
Hi. Fisrt: what is a 0,156 4 pin connector? ...after series of double checks I can be sure that there are not 14 (but 13) marked 10K resistors,not 9 (but 8)100n, (and 10pF is not even printed) on my Bi-N-Tic PCB...Am I right, or does this overlay have a missprint?
2005-08-14 by havensole
ok, resoldered all the wrong resistors and suprisingly, i'm getting even less of a signal output now. i think i'm just going to give up on this board and buy another fresh pcb. i think with all my soldering and resoldering of the board as well as my friends poor choice in compone
2005-08-13 by sasami@hotkey.net.au
Sounds like the delay isn't working, or is too short. Also, if you are using a LM358 as the input processor, switch it to a TL072 - it may be the the LM358 is too slow, giving a poor clock signal. Ken >Hello All, > >I just finished constructing, rather reconstructing (I bought it
2005-08-13 by gaddargaddar
Hi...My name is Necip and I'm from Turkey...I wanted to make my own modular...I'm fairly a newbie at designing and making synth modules...I made DIY guitar effects for my bass before...so I know how to solder etc. I need help to understand the electronic basics or concepts about
2005-08-13 by xambolt
Hello All, I just finished constructing, rather reconstructing (I bought it used from someone who had -ahem- "interesting" soldering techniques) my first CGS module, a Gated Comparator. It's running almost 100% correctly, and I spent a few hours last night playing with it - very
2005-08-12 by Richard Brewster
I found with my Steiner VCFs that the transistor gain makes a big difference. Look through the archives to find my posts on measuring transistor beta for the 2N2222. -Richard Brewster sasami@... wrote: >Sounds like a problem withthe two transistor amplifier stage - there isn't >e
2005-08-12 by havensole
thanks alot. went back over the values and found that whne my friend started the board, he switched the 82 and the 8.2k ohm resistors, as well and made errors in the 390 into a 3.9k and the 3.9k into a 390M ohm resistor. and used 10 ohm resistors where 10k's go. i'll replace thes
2005-08-12 by sasami@hotkey.net.au
Check your resistor values. From the photo, the 82 ohm apears to be 8k2. That alone would make it unlikely to work. Ken >checked all the transistors and everything is in the way the board shows them to be, with the tabs pointing the right way. i am using the specific transistors
2005-08-12 by havensole
yeah, i figured that my original hookup was right, strange thing is that i get the same issue with both types of connections. ----- Original Message ----- From: Laurie Biddulph To: cgs_synth@yahoogroups.com Sent: Thursday, August 11, 2005 11:12 PM Subject: Re: [cgs_synth] stiener
2005-08-12 by Laurie Biddulph
Hi, Your first approach with the batteries was correct. This circuit DOES need both a +ve and a -ve supply and connecting the batteries as first described would achieve that. However, this circuit also needs at least 12V on each rail so that he various biasing points are correctl
2005-08-12 by bbluthang
here's a pic for wiring the batteries http://www.musicfromouterspace.com/analogsynth/ninevoltsupply.html --- In cgs_synth@yahoogroups.com , "Haven Sole" wrote: > checked all the transistors and everything is in the way the board shows them to be, with the tabs pointing the right
2005-08-12 by Haven Sole
checked all the transistors and everything is in the way the board shows them to be, with the tabs pointing the right way. i am using the specific transistors that the site says to use with the metal caps. the other thing i am thinking about is that i am powering it via 2 9v batt
2005-08-12 by sasami@hotkey.net.au
Sounds like a problem withthe two transistor amplifier stage - there isn't enough gain. Check you have all the right parts in it. Ken >Put the synthacon VCF together, and it seems to be working, but it will >not self oscillate. It doesn't seem like the resonance is working >corre
2005-08-12 by kaptainkaoss
Greetings, Put the synthacon VCF together, and it seems to be working, but it will not self oscillate. It doesn't seem like the resonance is working correctly. The res definitely changes the amplitude, and sharpens up a low-pass filtered square wave somewhat, but you cannot seen
2005-08-11 by sasami@hotkey.net.au
Check your transistors are in the right way around. If you have used a plastic variety, they may well be backwards. Also make sure you have the right sort in the right spot, and that your diodes are all facing the right way. Ken >ok, update..... still not working. checked all sol
2005-08-11 by Haven Sole
ok, update..... still not working. checked all solder points, connections, ect, and still nothing. i am getting a very very faint signal coming through, but it doesn't apear that the cutoff or res knobs do anything and it seems kinda distorted. if anyone can help, please send me
2005-08-11 by Haven Sole
thanks. i realized earlier today that i was missing a resistor and placed it in wen i got home from school. the only other holes are the ones for the different sized caps, some of the extra power pads, 2 grd padsnext to the group of 4 caps. think i might have found the problem th
2005-08-11 by brett x
I think from your description you are connecting the signal connection to either the ring connector in TRS 1\4 jack or to the closed connection in an NC jack which of course becomes open when you insert a jack and therefore you lose the signal connection. Either way I'd suggest c
2005-08-11 by Haven Sole
cool cool. thanks for the info. second part i am dealing with is that when plugged in, i get no signal. correction, i get practically no signal. most likely i have the pins on the jacks configured wrong, or the guy i got it from configured them wrong. the jacks are panel mount wi
2005-08-11 by sasami@hotkey.net.au
Those pads are to allow different sized capacitors to be installed. Nothing else needs to connect to them. Ken >hey all, sorry if this is basic newbie stuff, but i'm having some real >problems wiring my pcb for the steiner vcf. i inherited the pcb from a >friend who was leaving t
2005-08-11 by havensole99
hey all, sorry if this is basic newbie stuff, but i'm having some real problems wiring my pcb for the steiner vcf. i inherited the pcb from a friend who was leaving the country and it was already half built. rummaging around my parts, i found all the needed ones and finished the
2005-08-11 by djbrow54
Am in the process of building an echo delay module around the CGS-44 development board. I've validated most of the design and am now building the module. It will take a while as I am planning on a stooge panel instead of a FrontPanelExpress. Photos and schematic of current progre
2005-08-09 by sasami@hotkey.net.au
>on the cgs30 diagram for stacking multiple filters theres a wire to >run from the bead on the top bandwidth filter pcb to the -ve on the dc >mixer. does this share the hole with the 10r resistor (substitute for >ferrite bead)or is it joined from the pad on the underneath of the
2005-08-09 by Fiercefish
Easy, just follow the track back to the previous pad and run a small link. Works for me. FF ----- Original Message ----- From: mesonproductions To: cgs_synth@yahoogroups.com Sent: Tuesday, August 09, 2005 5:28 PM Subject: [cgs_synth] damaged pad .....does it matter??? doing some
2005-08-09 by sasami@hotkey.net.au
Just run a thin wire to the nearest good piece of track. As long as there is electrical continuity, all will be fine. In this case you will need to join to both pieces of track that used to be connected to the pad. Scape the solder mask away with a razor, and use thin wire - perh
2005-08-09 by mesonproductions
doing some desoldering, I managed to damage a pad....... its on the top board of the bandwidth filter stack, see diagram in cgs30 module. looking at the diagram you will see a red wire running from the top cgs30 pcb to the +ve on the dc mixer. where the wire connects to the top f
2005-08-09 by mesonproductions
on the cgs30 diagram for stacking multiple filters theres a wire to run from the bead on the top bandwidth filter pcb to the -ve on the dc mixer. does this share the hole with the 10r resistor (substitute for ferrite bead)or is it joined from the pad on the underneath of the pcb.
2005-08-07 by djbrow54
I've tried two emails to you and both were refused with the following messages: Reason: Remote SMTP server has rejected address Diagnostic code: smtp;553 Spam Received See: http://www.sorbs.net/ lookup.shtml?206.46.252.40 Remote system: dns;mailstore.hotkey.net.au (TCP|206.46.252
2005-08-06 by bbluthang
--- In cgs_synth@yahoogroups.com , "boward_k" wrote: > Hi,I want to have an LED(Blue) showing the Rate of the Psycho LFO. > Should I use the LED driver, and how would I connect it? you could try connecting the led driver to the output (the driver would need the diode mod mentione
2005-08-06 by boward_k
Hi,I want to have an LED(Blue) showing the Rate of the Psycho LFO. Should I use the LED driver, and how would I connect it?
2005-08-04 by grant tucker
thanks andrew, Now that I think of it, I do recall reading that. regards Grant Send instant messages to your online friends http://au.messenger.yahoo.com
2005-08-04 by grant tucker
gidday brett, cheers, I'm putting together 6 bandwidths. regards grant ____________________________________________________ Do you Yahoo!? Yahoo! Photos: Now with unlimited storage http://au.photos.yahoo.com
2005-08-04 by brett x
Heya I'lll try to pull mine out of my modular tonight and have a look. One suggestion if you need a mixer as well is to wire up all the other inputs as well and maybe put it in a single module beside your filter rather than just using it for one input etc. by the way how many fil
2005-08-03 by bbluthang
--- In cgs_synth@yahoogroups.com , "mesonproductions" wrote: > hi, > I'm building the stacked cgs30's. > I need some clarification with the wiring of the out pot on the dc mixer. g'day Ken's page on the CGS04 DC mixer has some helpful diagrams. note this output pot has just 2 wir
2005-08-03 by mesonproductions
hi, I'm building the stacked cgs30's. I need some clarification with the wiring of the out pot on the dc mixer.
2005-08-03 by grant tucker
thanks Ken. Regards Grant Send instant messages to your online friends http://au.messenger.yahoo.com
2005-08-02 by sasami@hotkey.net.au
If the shaft is not shown in the picture, it is meant to be the rear of the pot. Most, if not all of my diagrams show the rear of the pot. Ken >hello, > >it goes without saying I'm new to this. > >I need to know which is gnd and which is +ve on the lin pots >specifically in the s
2005-08-02 by mesonproductions
hello, it goes without saying I'm new to this. I need to know which is gnd and which is +ve on the lin pots specifically in the steiner VCF wiring diagram on the CGSsynth site. Are the pots in the diagram pictured as the rear of the pot or the knob facing you? cheers Granr
2005-07-25 by sasami@hotkey.net.au
It's there to prevent oscillation. 47p. Ken >Hi all, > >I'd like to know the value you choose for the feedback ceramic >capacitor across TL71 ? > >Schem shows 470pF while partlist mentions 47pF. > >Cheers, >Emmanuel > > > > >The CGS Modular Synth home page: http://www.cgs.synth.n
2005-07-25 by modulardiyer
Hi, I'm planing to buy a Analog Switch Matrix and was wondering which signals control the switches ; I've build the René Schmitz's Three Phase LFO and was thinking about it, or maybe the outputs of an Analog Shift Register ? Was also planing one common control input socket...stup
2005-07-25 by modulardiyer
Hi all, I'd like to know the value you choose for the feedback ceramic capacitor across TL71 ? Schem shows 470pF while partlist mentions 47pF. Cheers, Emmanuel
2005-07-25 by Adam Schabtach
For sale: one CGS Bi-N-Tic PC board, unused, $12. Changes in needs, plans, and whims have led me to the realization that I probably won't build this module, so I'd like to find a new home for the PC board. I'm selling it for the same price as Ken's, but I will ship it for free vi