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2008-06-17 by Jason Proctor
selling my MOTM format 4-band CGS bandpass filterbank. it's basically 4 of these - http://cgs.synth.net/modules/cgs30_bpf.html in a 2U module, behind a nice dark green FPE panel. pots are Alpha (largely due to the unavailability of dual-gang variants of my usual Bourns/Spectrols
2008-06-17 by adaaxs
I have moved the MPF102 and the J112 off of my basic shop stock list. I now keep 4391 and the BF245 around as basic jfet trans. > > It will sort-off work, but it's not a very good choice. The MPF102 is a > small > signal amp, not really a switch. > > According to Ian Fritz on the
2008-06-17 by Scott Deyo
I agree. I've used the PN4391 as a substitute in the VCO, Bi'N'Tic Filter (quite a few), and other VCOs, and have never had a problem w/ it. Cheers, Scott Deyo The Bridechamber contact@... http://www.bridechamber.com Jealous Edison Record Kompany http://www.jealousedison.com On J
2008-06-17 by Louis van Dompselaar
It will sort-off work, but it's not a very good choice. The MPF102 is a small signal amp, not really a switch. According to Ian Fritz on the electro-music forum, the best FET for this type of VCO currently in production is the PN4391. > Does anyone know if a MPF102 JFET will work
2008-06-17 by graet63
Does anyone know if a MPF102 JFET will work in place of the 2n4856?
2008-06-10 by Scott Deyo
Did you see Ken's possible mod for some 4516 chips on his page? If you're not clocking, that may well be the fix. The only diodes I added were between the Gate Outputs and the On/Off switches. They're off-board. You can see them on the pic on the site (which I still need to link
2008-06-10 by Jeff Laity
I'm having problems with mine. :( The LEDs barely light up, and only the first one does. I could use some help with the step switch too. Maybe I'll disconnect it for a while. I've been concentrating on my cabinet lately, but now I'll have a little time to work on the sequencer ag
2008-06-07 by Scott Deyo
hey all, so i finished my sequential switch/ event sequencer this morning. it roolz, all other seq's droolz! ; ) the up/down control, the reset and inhibit controls, inverted output, mix input -- what a great module! adding LFOs to certain steps makes it very very very fun, or ev
2008-06-06 by Mark
On 6/5/08, John Mahoney put forth: >Yeah, I usually call that a suboctave or an octave divider, if not a >clock divider (depending on the usage). Yes, those are the terms generally used by synthesists. Among guitarists and bassists, pedals that halve frequency are generally calle
2008-06-05 by John Mahoney
At 04:52 PM 6/5/2008, Mark wrote: >On 6/5/08, John Mahoney put forth: > > > > >You can also use the guitar signal as a carrier, ring modulating the > > >guitar with itself. > > > >Isn't that how vintage octave pedals work? > >Most octave pedals, as well as the dbx units, square u
2008-06-05 by Mark
On 6/5/08, John Mahoney put forth: > > >You can also use the guitar signal as a carrier, ring modulating the > >guitar with itself. > >Isn't that how vintage octave pedals work? Most octave pedals, as well as the dbx units, square up the signal then divide it with a flip-flop. Th
2008-06-05 by John Mahoney
At 12:12 PM 6/5/2008, Mark wrote: >On 6/5/08, data2action put forth: > >but you'll also need a carrier signal. [snip] Thanks, I forgot to mention that. >You can also use the guitar signal as a carrier, ring modulating the >guitar with itself. Isn't that how vintage octave pedals
2008-06-05 by Mark
On 6/5/08, data2action put forth: >but you'll also need a carrier signal. most guitar ringmod pedals have >a vco built in as a carrier; sometimes their frequencies are modulated >by the guitar signal. in th MFOS ring modulater ray uses a simple >resonanting VCF which produces a n
2008-06-05 by data2action
to use as a guitar effect, first you'll need to match the levels of the guitar to work with the ringmod. the cgs46 stompbox adapter will do that... so the guitar would go into the ring input cgs46; the boosted output at SIG2 would go to the input on the ringmod; the output of the
2008-06-04 by John Mahoney
At 10:13 AM 6/4/2008, anthonybuckalew wrote: >... what >additional circuitry is needed to make this a "plug in guitar and get >a sound". You need a CGS46 Stomp box adapter. (use a module as an effect pedal) or a CGS60 Stomp Box Adapter. (use effect pedal as a module) depending on
2008-06-04 by anthonybuckalew
Ken, I am not in the know about ring modulators and therefore fall under the category of "this is not for you" bu I really want to understand it better. I am intrested in the real ring modulator design because its at the core of the lovetone ring stinger pedal of which I am intre
2008-06-03 by Craig Lee
You mention that you have done some soldering but do not have a lot of experience with electronics. I would suggest starting with a simple module to get your feet wet. Maybe a manual mixer, we all need mixers, right. Also get good tools. Please do not go to radio shack and pick u
2008-06-03 by Scott Deyo
Hi Matt, DIY is a lot of fun, I think you'll really enjoy it. Everyone is very supportive. I do a lot of shipping to Canada. The weak US dollar helps for international business, at least. : ) A padded mailer, which most kits will fit in, is $6 to Canada. Heavier kits, with panels
2008-06-03 by Matt Patey
Hi Scott, Thanks for your reply. This group has offered me a warm welcome to the world of DIY and it's very encouraging for me to start building---I can't wait! My current system is mostly Blacet-based and at the moment I have most of the Blacet modules I want, so I'm looking for
2008-06-03 by Matt Patey
Hi Mark, Thanks for this. My system is in Frac and Eurorack format, but I'd be interested in expanding to other formats as well. As for the power supply, my understanding is that the CGS kits can be powered by PSUs like the one Blacet makes, right? I'd much rather buy one pre-mad
2008-06-03 by Matt Patey
Hi Laurie, This is very helpful, thanks. I'm now ordering a Synthacon filter and Utility LFO from your site. I'm happy to have now heard from several members of the CGS group and it has encouraged me to go ahead with my projects. Thanks again! Kind regards, Matt On 3-Jun-08, at 7
2008-06-03 by Scott Deyo
I think your first decision should be (unless you've made this one already) which format you will build in. There are lots of factors to consider, but that can be part of the fun : ) You mentioned a small system, so if size is your primary concern, you could start with kits from
2008-06-03 by Mark
On 6/2/08, Matt Patey put forth: > >I've spent a considerable amount of time with my pre-built modules. >I'd really like to start building a small entirely CGS-based system, >but I'm worried about choosing the best way to power the system and >getting front panels designed for al
2008-06-03 by Laurie Biddulph
Hi Matt, I supply component kits for the CGS family of modules although I do not supply front panels for them. These large format panels are available in various forms from a number of other suppliers like BrideChamber and MetalBox (I think). The CGS forum has a number of panel d
2008-06-03 by frank death
Hey Matt probably two of your best options are firstly- www.bridechamber.com They have a big selection of cgs kits & they also do panels for them. Secondly- www.elby-designs.com They also sell a wide range of cgs kits but im not sure if all have panels. However I think you may be
2008-06-03 by Matt Patey
Hi everyone, I'm really looking forward to trying my hand at building some CGS modules but am not sure where I should start. I have some experience soldering but I don't have a background in electronics. I've been considering doing DIY modules for a long time now, especially now
2008-05-29 by Mark
On 5/30/08, sasami@... put forth: > >He meant 2W. That is what is specified on the circuit diagram. Well, if it all went through that point, I'm thinking 15V at 50mA is 3/4W.
2008-05-29 by sasami@hotkey.net.au
>On 5/29/08, its_peake put forth: >> http://cgi.ebay.com/1J17B-Russian-miniature-pentode-Tubes-New-Lot-of-10_W0 QQitemZ330238671227QQihZ014QQcategoryZ58174QQssPageNameZWDVWQQrdZ1QQcmdZViewItem >> >>This is what I bought. $17.00 for ten including shipping. >> >>Don't forget that y
2008-05-29 by Mark
On 5/29/08, its_peake put forth: > http://cgi.ebay.com/1J17B-Russian-miniature-pentode-Tubes-New-Lot-of-10_W0QQitemZ330238671227QQihZ014QQcategoryZ58174QQssPageNameZWDVWQQrdZ1QQcmdZViewItem > >This is what I bought. $17.00 for ten including shipping. > >Don't forget that you'll n
2008-05-29 by its_peake
http://cgi.ebay.com/1J17B-Russian-miniature-pentode-Tubes-New-Lot-of-10_W0QQitemZ330238671227QQihZ014QQcategoryZ58174QQssPageNameZWDVWQQrdZ1QQcmdZViewItem This is what I bought. $17.00 for ten including shipping. Don't forget that you'll need 270r, 2W resistors as well. Shipping
2008-05-25 by Mark
After spending more time using the tube vca, I found the output was not high enough to work well with other modules. So I changed the feedback resistor of the output amp to 2.2K and added a 1K gain resistor resulting in an output of around 8.6Vpp. This also improved the range of
2008-05-22 by klstay
It looks like it should be fairly easy to add input attenuation pots as mentioned in the description along with a 3 way input switch. Up = input signal routed only through attenuating pot and to accompanying output. Mid = input signal routed first through attenuating pot then to
2008-05-20 by Mark
I made a few more changes to my CGS 65 tube VCA. To summarize my previous post: I left off all of the diodes so the heater goes directly from -Ve to a 1.2K resistor to ground, added a large cathode bypass cap, increased the 220nF coupling caps to 470nF, and replaced the TL072 wit
2008-05-20 by adaaxs
--- In cgs_synth@yahoogroups.com , "adaaxs" wrote: > > You got a catalog # for that big reset switch. > > Mouser # 612-RP3502MA-RED 612-RP3502MA-BLK 612-RP3502MA-YEL 612-RP3502MA-GRN it is 17mm =0.6629134" (inches) I have been looking for this damm switch for a month best gw
2008-05-19 by Jeff Laity
On May 19, 2008, at 12:35 PM, adaaxs wrote: > You got a catalog # for that big reset switch. > Digikey EG1938-ND Common MOTM-compatible parts are on this site: http://www.hotrodmotm.com/parts_list.htm I might not have gone with the red switch in retrospect. NOTICE: This electroni
2008-05-19 by adaaxs
You got a catalog # for that big reset switch. > On 19.05.2008, at 04:36, lexvortex wrote: > > > > > > > If I put switches in there it would be so that i could switch off/on a > > gate signal coming from a mixed gate out (another hole to drill) and I > > wouldn't want the switche
2008-05-19 by adaaxs
You got a catalog # for that big reset switch. > On 19.05.2008, at 04:36, lexvortex wrote: > > > > > > > If I put switches in there it would be so that i could switch off/on a > > gate signal coming from a mixed gate out (another hole to drill) and I > > wouldn't want the switche
2008-05-19 by Scott Deyo
I don't know what I was thinking, but I'll go with -- "Yeah, that was it!" But yeah, you can common all the gates together to new ("Gate Out"?) jack, post-switches. I did say something about a mixer before, but Jeff is right. Sorry this panel has been so messed up! Cheers, Scott
2008-05-19 by Jeff Laity
What is the output of the gate jack look like? Is it a pulse once every cycle, and the rest of the time it's 0V? If that's the case, why would you need a mixer to mix them together? It seems like you could just go from the gate out jack to the switch, switch to a common output. U
2008-05-19 by kwote uno
hey thanks for those. i'm gonna do a frac version but that was real helpful. On Sun, May 18, 2008 at 5:44 PM, Jeff Laity synthetic@... > wrote: > Here are some photos of my CGS sequential switch in progress, using > the Bridechamber panel. > > Drilling new holds for LEDs: > http:
2008-05-19 by Jan-Ahrent Czmok
On 19.05.2008, at 04:36, lexvortex wrote: > > > If I put switches in there it would be so that i could switch off/on a > gate signal coming from a mixed gate out (another hole to drill) and I > wouldn't want the switches to affect the individual gate outs. To get > the mix gate o
2008-05-19 by lexvortex
Thanks a lot for the photos!! Your sequencer looks good :) I hope mine will turn out as nice. I want to do the same thing you have done with the switches and the LEDs. If I put switches in there it would be so that i could switch off/on a gate signal coming from a mixed gate out
2008-05-18 by Jeff Laity
Ideally, the switches would trigger gate signals to a common output. That way I could have a little tune set up, and individual notes could be switched in and out. Those gates would go to the envelopes to trigger notes, and the pitch output would be constant. Would I need a secon
2008-05-18 by Jeff Laity
Here are some photos of my CGS sequential switch in progress, using the Bridechamber panel. Drilling new holds for LEDs: http://www.jefflaity.com/MOTM/seq/seq_drill.jpg Completed board (aka the easy part): http://www.jefflaity.com/MOTM/seq/seq_board.jpg Jacks and most pots instal
2008-05-18 by Jeff Laity
Yes, Synthtech has announced that they will have a Quantizer module. Knowing Paul, it will have non-standard tunings as well as equal temperament. On May 18, 2008, at 7:06 AM, lexvortex wrote: > That would be great, those pics would help a lot!! Do you mean Paul > Schreiber from
2008-05-18 by lexvortex
That would be great, those pics would help a lot!! Do you mean Paul Schreiber from MOTM? I have seen one quantizer for MOTM, it is not finished but it looks really cool, the Quantix 8 by Papareil. http://m.bareille.free.fr/modular1/quantix8/quantix8.htm Check it out, you can prog
2008-05-17 by Scott Deyo
You could use switches between the pots and PCB, connecting to ground as the 'off' setting. However, I'm not sure how useful that would be in action. I think I was referring to LEDs, because I can't believe I would forget to leave holes for those! The basic wiring that is not on
2008-05-17 by Jeff Laity
I'm working on the event sequencer right now using the Bride Chamber panel. I don't see in the schematic how the step switches are supposed to be wired up, am I missing something? Do they go between the input jack and the board? Also, for wiring pots to this circuit, do they go t
2008-05-17 by Mark
I recently completed construction and initial testing of the VCA using a 1SH24B tube. I built it in MOTM-format using a panel and bracket from Bridechamber. The version I built is different than the original circuit. In order to avoid damaging the PCB from excessive unsoldering,
2008-05-16 by teethonfeet
I just recently completed a CGS cynare that I am powering using Blacet PS500. The problem is when I patch it all up and power it on all I get is a regularly repeating popping sound. I get this from the VCA OUT and MIX OUT and without anything patched to the trigger. ...anybody? t