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2004-10-04 by sasami@hotkey.net.au
An error has been pointed out to me re the CGS51. The diagram shows a section of a TL072 being used. The board actually uses a TL071. As such pin numbers differ to what is shown on the diagram. I will correct it shortly. THE PCB IS CORRECT. Ken ___________________________________
2004-10-03 by stuadh
Comms are now established! --- In cgs_synth@yahoogroups.com , "Don't t(h)read on my tentacles, Earthling!" wrote: > > Le 3 oct. 04, à 00:46, stuadh a écrit : > > > is Ken Stone usually slow to respond to e-mails? I e-mailed > > him at the beginning of the week looking to buy some
2004-10-03 by Don't t(h)read on my tentacles, Earthlin
Le 3 oct. 04, à 00:46, stuadh a écrit : > is Ken Stone usually slow to respond to e-mails? I e-mailed > him at the beginning of the week looking to buy some PCBs, but > I haven't received a reply yet. I don't want to pester the man if > there is a good reason for this. There must
2004-10-02 by stuadh
Hi List, is Ken Stone usually slow to respond to e-mails? I e-mailed him at the beginning of the week looking to buy some PCBs, but I haven't received a reply yet. I don't want to pester the man if there is a good reason for this. Stuadh
2004-10-01 by Larry Troth
I just posted this to the DotComFormat group and thought that some of the members here might be interested. Please forgive me if this is off topic. I am posting these links in the hopes that some of you will find them useful in your search for parts and part information. This is
2004-09-29 by Larry T.
Ken When are we going to get some updated pictures of your modular? The last one is from 2001 and that was a LONG time ago. Surely with all of the module designs you've been doing you've built some of them up? We'd like to see what your system looks like now. And we love your pan
2004-09-29 by Larry T.
--- In cgs_synth@yahoogroups.com , Larry Hendry wrote: > > I had discussed printing extra panels for other people with John > > Mitchell and Morbius. I had figured on a 2 for one barter - one > > printed and drilled panel in exchange for 2 blank panels (or > > equivalent). There
2004-09-29 by Larry Hendry
> I had discussed printing extra panels for other people with John > Mitchell and Morbius. I had figured on a 2 for one barter - one > printed and drilled panel in exchange for 2 blank panels (or > equivalent). There was going to be a yahoo groups just for adapting > modlues to D
2004-09-29 by Jeff Brown
--- In cgs_synth@yahoogroups.com , "Larry T." wrote: > --- In cgs_synth@yahoogroups.com , "Jeff Brown" wrote: > > --- In cgs_synth@yahoogroups.com , "Larry T." wrote: > > > Mr. Brown > > > > > > The panels you posted in the photo section are GREAT! > > > > > > I did the panels my
2004-09-27 by Larry T.
--- In cgs_synth@yahoogroups.com , "Jeff Brown" wrote: > --- In cgs_synth@yahoogroups.com , "Larry T." wrote: > > Mr. Brown > > > > The panels you posted in the photo section are GREAT! > > > I did the panels myself, silkscreening blank dotcom panels from Roger > and drilling the
2004-09-26 by Jeff Brown
--- In cgs_synth@yahoogroups.com , "Larry T." wrote: > Mr. Brown > > Are you still aroung on this list? The panels you posted in the photo > section are GREAT! Did you do them yourself or are they Stooge > panels? I've been thinking about a couple of the same modules you > posted
2004-09-26 by Larry T.
Mr. Brown Are you still aroung on this list? The panels you posted in the photo section are GREAT! Did you do them yourself or are they Stooge panels? I've been thinking about a couple of the same modules you posted so I had to ask. Larry T.
2004-09-23 by charlesosthelder
Finally - power and light! The nearly finished pentode preamp/soft clipper/beam modulator was fired up and tested last night. The beam modulator works very well. With two audio freq CV inputs and an audio grid input, it produces two very nice sideband outputs. The clipper does in
2004-09-15 by Les Mizzell
Morning, I've got a Voltage Controlled Divider that I'm having some problems with. Regardless of how I set the offset trimmer, I can't seem to get a division smaller than around 1:9 or (on a lucky day) 1:8. Ideas of what might be wrong? TIA -- Les Mizzell
2004-09-09 by charlesosthelder
So I should probably build the pentode preamp to drive these devices? No problem. A tube VCA at the out would be a nice addition as well... Chub --- In cgs_synth@yahoogroups.com , "david wright" wrote: > hey guys - the clipper has no gain, and needs some gain > before it works to
2004-09-09 by david wright
hey guys - the clipper has no gain, and needs some gain before it works too well. the beam modulator does not boost gain i do not belive. i can test tonight dave wright ----- Original Message ----- From: sasami@... To: cgs_synth@yahoogroups.com Sent: Wednesday, September 08, 2004
2004-09-08 by sasami@hotkey.net.au
>Hello again, Ken! > >Do the beam modulator and soft clipper circuits have gain? > >Chub Um... I don't remember.... That section of my synth isn't connected up at the moment... Ken _______________________________________________________________________ Ken Stone sasami@... or sas
2004-09-08 by charlesosthelder
Hello again, Ken! Do the beam modulator and soft clipper circuits have gain? Chub
2004-09-06 by sasami@hotkey.net.au
>I have a question about the clipper circuit, however. Why does the >schematic list 12 volts for the filament with the 18 ohm resistor? >Everything else seems pretty straight forward. That is because in Eric's original article, he allowed for surplus 4BN6 and 3BN6 to plug into th
2004-09-06 by charlesosthelder
Hey Ken! Having given up trying to make a +-15vdc supply work with the beam mod project, I've decided to build a high voltage unit. This will include a pentode preamp and 6BN6 clipper as well. I found a perfect transformer (270V secondary, center tapped and a center-tapped 6V fil
2004-08-30 by Richard Brewster
Glad it was useful. Just remember to buy a quantity of 2N2222 and 2N2907 transistors, so you can match them. I suggest 20 or 30 of each. You can use 2N2222A, as well. -Richard ps_minor wrote: >me too, i am most grateful for this piece of info. thank you richard! > > i've been del
2004-08-30 by ps_minor
me too, i am most grateful for this piece of info. thank you richard! i've been deliberating for weeks on which way to proceed, ultra-compact stereo sythicon w one set of controls or start a new frac-rack. i've decided on the frac-rack so i'll be building 2 complete modules. look
2004-08-29 by Larry Hendry
Richard, This is a GREAT piece of information. Thanks for posting it. I have not built my Synthacon yet. But, I will be sure and follow your advice, adlong with the stuff sent my John. Looks as if I will be the benefactor of your R&D. :-) Best, Larry --- Richard Brewster pugix@..
2004-08-29 by Richard Brewster
Update. By swapping transistors around I was able to get better and more similar response from my two Synthacon filters. I removed all 8 transistors and measured the gain of each, along with some extras that I had in my parts box. Then I repopulated the boards with matched parts.
2004-08-16 by ps_minor
thanks richard for your comments. so it sounds like transistor matching and diode matching are a must. perhaps i'll go ahead and build 2 as seperate units. i can always mult a single cv control and apply equally to both when needed. i was thinking of doing 2 in one box for econom
2004-08-16 by Richard Brewster
One thing you'll need to consider is that the Synthacon VCF response is highly dependent on the transistors and diodes. I built two of these in a single panel and discovered that with identical parts the response and sound is still quite different. I did not match the diodes or t
2004-08-15 by ps_minor
hi all, i'm new to this list. i just dicovered ken's excellent diy site today after searching around for kits/pcbs for building a simple stereo filter. i'm thinking of putting 2 synthacon pcb's in a box and using just one set of pots/cv jacks for controls. my objective is to proc
2004-08-13 by cgs@oldmail.charlielamm.com
Wow! Great link! Thanks, I didn't know about this one. --CL On Fri, 13 Aug 2004, Larry T. wrote: > For everyone looking for parts and for part specifications, I have > found a VERY interesting site: http://www.findchips.com > > It lets you find availability and sometimes pricing,
2004-08-13 by Larry T.
For everyone looking for parts and for part specifications, I have found a VERY interesting site: http://www.findchips.com It lets you find availability and sometimes pricing, Also generally one of the suppliers listed will have a link to the part spec sheets. Kills a lot of bird
2004-08-13 by sasami@hotkey.net.au
Pin 8 is the tab. The pins then count down in a clockwise direction, like an ordinary DIP does. Ken >I'm ready to put the 4 LF356 into the ASR. Unfortunately I'm not sure >which pin is which. I know where pin 8 is but, looking at the data >sheet, I'm not positive if I'm looking a
2004-08-13 by peng3002
I'm ready to put the 4 LF356 into the ASR. Unfortunately I'm not sure which pin is which. I know where pin 8 is but, looking at the data sheet, I'm not positive if I'm looking at a bottom view or top view of the can. Seeing that the 4 cost me $10 I'm a little apprehensive to gues
2004-08-05 by sasami@hotkey.net.au
I'd say it would be close enough as it is. Ken >Hi there, >I was thinking of building a synthacon filter piggybacked off of the >stomp box adapter board but my plans were to run a line level >through it as opposed to a guitar... so I'm wondering if any parts >values on the board
2004-08-05 by eblake_smith
Hi there, I was thinking of building a synthacon filter piggybacked off of the stomp box adapter board but my plans were to run a line level through it as opposed to a guitar... so I'm wondering if any parts values on the board should be altered or if it is going to be close enou
2004-08-01 by martinjbeer
Thanks for the offer, but I'm in the UK, so postage might be too much hassle. Theres a surplus place I use sometimes that does germanium diodes pretty cheaply, so I'll probably just order quite a few of those and pick out the ones that match best.
2004-07-29 by charlesosthelder
A little something from the parts bin?!!! I think my wife would go off! Don't worry about the postage, either Bob. If I'm ever in Cleveland, just buy me a drink! I got the diodes free, I give the diodes free. 'Nuff said. I'm just happy to have two of these RM's in the Engine of C
2004-07-29 by rdrake
DOH!! careful with that reply button, eugene. obviously meant to be backchannel--sorry 'bout that... >Message: 1 > Date: Wed, 28 Jul 2004 23:02:28 -0400 > From: "R. Drake" rdrake@... > >Subject: Re: Ring modulator questions...... > >Chub, >
2004-07-29 by R. Drake
Chub, I'd like to take you up on the offer of a set of diodes, but at the very least let me reimburse you for shipping... if your offer stands, send to Bob Drake PO Box 585 Cleveland OH 44107 and I'll shoot you back whatever the postage is, plus a little something from the parts
2004-07-27 by charlesosthelder
The passive ring modulator sounds different because of the losses inherent in the transformers and to a lesser extent, the diodes. However, these losses are frequency specific, making the circuit very "organic" sounding when compared to an active balanced modulator. I liked the s
2004-07-26 by martinjbeer
Hi, I've just come across this group, and have some questions about Ken's passive ring modulator boards (I like ring mods, so I'm tempted to try one). Does a passive ring mod drop the signal level enough to need some sort of gain stage after it (and if so, does it need anything s
2004-07-26 by Fernando
On it's own page at CGS site it's said that it can be used for displaying positive going voltages with some components addition/change, I think. Just read it again. Fernando > does anyone know whether the LED driver will enable the LED to display such things as >envelopes, lfos e
2004-07-26 by Michael
> Attenuators must be wired a certain way, and I suspect you've not got them > right. > > The input jack goes to the clowcwise end of the pot. The center pin of the > pot goes to the PCB. The counterclockwise end of the pot goes to 0V/GND on > the PCB. > > Ken Cool thanks Ken, to
2004-07-26 by sasami@hotkey.net.au
> One question - I built mine with attenuaters (100k L pots) on each >input and also on CV 1 - I notice that the volume lowers but not to >0% just like maybe 20% on each of them - I'm a novice at circuits >still, I assume you'd need an opamp and actually make a mixer circuit >to
2004-07-26 by Michael
This thing is freakin great - I started with the John Loffink tweaks and then tweaked it further to my taste and it sounds so unique - One suggestion i'd make is that if you ever think of making a rev 2 - you might have pots onboard for tweaking the cv inputs. One question - I bu
2004-07-23 by Richard Brewster
Ok, I'm a synth geek. To prove it I decided to grok the Grinder circuit and built one on my prototyping gig, it's so simple. The only part value that differed from the schematic was the 4n7 instead of the 5n6 cap. I fed it a variety of input waveforms, all 10V peak to peak, from
2004-07-23 by charles kerr
Hi all does anyone know whether the LED driver will enable the LED to display such things as envelopes, lfos etc. ie by glowing brighter and then dimming over the course of the event, or is it a simple on/off gate display? I would prefer the former option, does this need any mods
2004-07-21 by Larry Hendry
--- Richard Brewster pugix@... > wrote: > As for the capacitor, I don't have a 5n6 cap on hand. So I think > I'll try a 4n7, which is pretty close. 1. You know you are officially a synth geek when you use the phrase " what I have on hand." 2. I had an issue with the control range
2004-07-20 by Larry T.
Ken and all If anyone is looking for Germanium diodes to build anything, check out the following link: http://www.americanmicrosemi.com/information/spec/?ss_book=di&ss_sect=03&ss_noun=1100 If you know a part number you actually have a chance to find them here. Also, they are a go
2004-07-20 by Richard Brewster
Neat idea to add VC to the Grinder. And there is a prototype area on the PC board too. I won't be able to get very creative here, since I have a Stooge panel on order for the Wave Multiplier, and that panel design is predetermined. This is the only CGS module of mine that I didn'
2004-07-20 by Fernando
> I'll be building a Wave Multiplier soon. I was wondering about the > values in the Grinder circuit and whether anyone had experimented with > different parts values. yes, the Grinder is so simple that invites to experiment. I wondered if using vactrols for the Lag pot and/or th
2004-07-19 by sasami@hotkey.net.au
>I'll be building a Wave Multiplier soon. I was wondering about the >values in the Grinder circuit and whether anyone had experimented with >different parts values. Why is a 5n6 cap chosen for the lag circuit, >rather than a 4n7 or 10n? Sorry to be so informative.... but why not