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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Mon May 25, 2009 6:03 pm Post subject:
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Hi,
No need to jumper anything if building it like the original. If you use an external noise source on board 3, then you need to cut the trace coming out of the noise IC.
R.
inform3r wrote: | Wow vtl5c3! Quite an undertaking here. Thanks! I've read the thread a couple of times. I'm just getting around to plotting things out. Planning the panel, etc.... For now I'm just curious about one thing.... I know you added a couple of features here and there. You added the possibility for people to inject their own noise source via a jack for instance. Well, if I decide to keep the module without certain additions can I just leave the associated pad alone and everything will be cool? No need to jumper it or anything? Sorry, just curious and taking it slow.
Best Regards,
John |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Mon May 25, 2009 6:07 pm Post subject:
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Hi,
The manual control is the same thing as the "Quantization" pot on the original module. I just didn't bother to look at the panel labeling when I wrote that post. I did add an attenuation pot on my QRV voltage input, but it isn't required.
Romeo
inform3r wrote: | vtl5c3 wrote: |
Inputs:
1) CV input jack with attenuator pot. The PCB layout has extra inputs in case someone wants to add them.
2) Clock input jack.
Manual control:
1) 1 Pot
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vtl, another stumper.... What is the "Manual Control Pot"? In the QRV section of the old 266 there's 2 inputs and one of them has a dedicated pot (attenuator?). Are there 2 pots in your QRV section or is the "manual control" pot the attenuator for the CV in? |
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inform3r
Joined: Sep 03, 2006 Posts: 59 Location: nyc
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Posted: Tue May 26, 2009 6:58 pm Post subject:
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vtl5c3 wrote: | Hi,
The manual control is the same thing as the "Quantization" pot on the original module. I just didn't bother to look at the panel labeling when I wrote that post. I did add an attenuation pot on my QRV voltage input, but it isn't required.
Romeo
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Hi Romeo. Thanks. So then the "Manual Control" is indeed the equivalent of the "Quantization" pot on the original 266. Cool. Since the Manual Control is connected to an input I assumed it was a type of attenuator. But in the last part of your message you said that you "added an attenuation pot on your QRV input voltage, but it isn't required". I thought Manual Control was sort of an attenuator? Did you add an extra pot to your QRV section, or am I misunderstanding your statement and possibly the function of the Manual Control/Quantization knob?
Other than that it hasn't been too hard to associate most of the pads with the 266's various controls. However.... I'm having a bit of trouble breaking down board 4. The lowest section of the 266 is what I'm the most unfamiliar with. I know that it's mostly a S&H and Slew, but I can't pair up your labels with the original panel, thus I don't know where/how to place them. I'm going to list the stuff on board 4 (below) that I'm confused with. Could you write the 266 panel equivalent beside the items on my list? Thanks!!
PCB 4:
Clock In
S&H In
Slew In
Slew Out
Slew CV In
Slew Control
Pulse 1 Out
Pulse 2 Out
CV 1 & 2 Out
CV 1 Out
CV 2 Out |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Wed May 27, 2009 8:02 am Post subject:
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(still no split for this thread ? )
Are 2N4391 Transistors common items ?
Quite expensive on ebay (and in small quantity)... |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Wed May 27, 2009 8:56 am Post subject:
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Hi,
2N4391 are easy to get, at least in the US. Try looking for PN4391, that's the TO-92 plastic package version.
R.
funkyfarm wrote: | (still no split for this thread ? )
Are 2N4391 Transistors common items ?
Quite expensive on ebay (and in small quantity)... |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Wed May 27, 2009 9:09 am Post subject:
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inform3r wrote: |
Hi Romeo. Thanks. So then the "Manual Control" is indeed the equivalent of the "Quantization" pot on the original 266. Cool. Since the Manual Control is connected to an input I assumed it was a type of attenuator. But in the last part of your message you said that you "added an attenuation pot on your QRV input voltage, but it isn't required". I thought Manual Control was sort of an attenuator? Did you add an extra pot to your QRV section, or am I misunderstanding your statement and possibly the function of the Manual Control/Quantization knob? |
Manual control provides an offset voltage. An attenuator allows you to limit how much of the input signal reaches the circuit that will be processing it.
inform3r wrote: |
Other than that it hasn't been too hard to associate most of the pads with the 266's various controls. However.... I'm having a bit of trouble breaking down board 4. The lowest section of the 266 is what I'm the most unfamiliar with. I know that it's mostly a S&H and Slew, but I can't pair up your labels with the original panel, thus I don't know where/how to place them. I'm going to list the stuff on board 4 (below) that I'm confused with. Could you write the 266 panel equivalent beside the items on my list? Thanks!! |
Well, that's really every connection on the panel. I recommend looking at the schematic in addition to the front panel to help make sense of things.
PCB 4:
Clock In = Pulse In
S&H In = C.V. In
Slew In = Integrator (input jack)
Slew Out = Integrator (output jack)
Slew CV In = Time Constant (input jack)
Slew Control = Time Constant (Pot)
Pulse 1 Out = alt (jack)
Pulse 2 Out = alt (jack)
CV 1 & 2 Out = C.V. Out (jack)
CV 1 Out = alt (Jack)
CV 2 Out = alt (Jack) |
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tommi
Joined: Dec 05, 2007 Posts: 247 Location: Italy
Audio files: 3
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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Posted: Wed May 27, 2009 1:12 pm Post subject:
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Thank you.
they also give that :
2N 4391
Crossreference match for: PN4391, NTE467 |
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CJ Miller
Joined: Jan 07, 2007 Posts: 368 Location: 127.0.0.1
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Posted: Wed May 27, 2009 2:19 pm Post subject:
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funkyfarm wrote: | Thank you.
they also give that :
2N 4391
Crossreference match for: PN4391, NTE467 |
I recall also using MPF102 for similar applications. |
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inform3r
Joined: Sep 03, 2006 Posts: 59 Location: nyc
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Posted: Wed May 27, 2009 5:15 pm Post subject:
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inform3r wrote: |
Hi Romeo. Thanks. So then the "Manual Control" is indeed the equivalent of the "Quantization" pot on the original 266. Cool. Since the Manual Control is connected to an input I assumed it was a type of attenuator. But in the last part of your message you said that you "added an attenuation pot on your QRV input voltage, but it isn't required". I thought Manual Control was sort of an attenuator? Did you add an extra pot to your QRV section, or am I misunderstanding your statement and possibly the function of the Manual Control/Quantization knob? |
vtl5c3 wrote: |
Manual control provides an offset voltage. An attenuator allows you to limit how much of the input signal reaches the circuit that will be processing it.
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Thanks, but I'm already very familiar with what both are. I think we're misunderstanding each other.... My confusion and subsequent questions about "1 pot or 2 pots" stem from a couple of posts in which you mention both the attenuator and Manual Offset pots in the QRV. Since the original 266 panel had one pot in the QRV section and since I only see one pot on your PCB (maybe I missed the other?) I was confused by what seemed to be contradictory statements.
inform3r wrote: |
I'm going to list the stuff on board 4 (below) that I'm confused with. Could you write the 266 panel equivalent beside the items on my list? Thanks!! |
vtl5c3 wrote: |
Well, that's really every connection on the panel. I recommend looking at the schematic in addition to the front panel to help make sense of things.
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Really? How so? There's 4 PCB's and this only pertains to one. You are right about the schematics. I tend to print them for better viewing (especially Buchla stuff!). It will be a few days until I can get that done so I thought I would just ask. I feel like I'm pulling teeth a little. Is it a newbie rite of ritual? I was a card carrying member of AH and a few other synth groups for 10+ years.
vtl5c3 wrote: |
PCB 4:
Clock In = Pulse In
S&H In = C.V. In
Slew In = Integrator (input jack)
Slew Out = Integrator (output jack)
Slew CV In = Time Constant (input jack)
Slew Control = Time Constant (Pot)
Pulse 1 Out = alt (jack)
Pulse 2 Out = alt (jack)
CV 1 & 2 Out = C.V. Out (jack)
CV 1 Out = alt (Jack)
CV 2 Out = alt (Jack) |
Thanks Romeo! That helps me a lot. I've been thinking of ways (what format, layout) to build this and your info is vital. I'm sure it will be of much use to other members too. |
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billy pilgrim
Joined: Feb 12, 2008 Posts: 36 Location: nyc
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Posted: Sat Jun 06, 2009 9:55 pm Post subject:
266-4 |
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I've finished boards 1,2 & 3 and they all work great, just starting to look at board 4. It looks to me that the emitters of the PNP pair in the integrator are tied to ground, via 10k, instead of +15v ? Similarly pin 3 of the lower 4013 should be tied to +15v instead of ground ? Anyone else looked at this ?
ericcoleridge wrote: | Anyone here tackle board 4 yet? Although it's been a while since I've looked at it, I had some problems with mine. Just wondering what other's experience has been? |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Sat Jun 06, 2009 11:25 pm Post subject:
Re: 266-4 |
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Ugh... Good eye. I will fix the layouts. Sorry about that.
billy pilgrim wrote: | I've finished boards 1,2 & 3 and they all work great, just starting to look at board 4. It looks to me that the emitters of the PNP pair in the integrator are tied to ground, via 10k, instead of +15v ? Similarly pin 3 of the lower 4013 should be tied to +15v instead of ground ? Anyone else looked at this ?
ericcoleridge wrote: | Anyone here tackle board 4 yet? Although it's been a while since I've looked at it, I had some problems with mine. Just wondering what other's experience has been? |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Sun Jun 07, 2009 10:02 am Post subject:
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I've posted the fixed layout, on the third page of this thread. To those of you that have already made a board with the older version - I apologize. If you need any advice for hacking the old layout so that the two resistors going to ground actually go to V+ - let me know. It shouldn't be too hard.
R. |
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inform3r
Joined: Sep 03, 2006 Posts: 59 Location: nyc
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Posted: Fri Jun 19, 2009 11:46 am Post subject:
Re: 266-4 |
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Billy, great to know that you have the three boards up and running! Once completed this will be one powerful module. Thanks Romeo!
Has anyone started work on a panel yet? I've been thinking about it conceptually, and I'll probably do it in Frac format and I'll also try and keep a similar look to the original I think. Any thoughts?
billy pilgrim wrote: | I've finished boards 1,2 & 3 and they all work great, just starting to look at board 4. It looks to me that the emitters of the PNP pair in the integrator are tied to ground, via 10k, instead of +15v ? Similarly pin 3 of the lower 4013 should be tied to +15v instead of ground ? Anyone else looked at this ? |
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funkyfarm
Joined: Jan 21, 2007 Posts: 583 Location: France
Audio files: 3
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inform3r
Joined: Sep 03, 2006 Posts: 59 Location: nyc
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Posted: Fri Jul 03, 2009 11:06 am Post subject:
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funkyfarm wrote: | 266-3 266-4
did anyone test STPPED output for both FRV ? need slewed and stepped versions at the same time ? or a switch is fine ?
or separate clock/input sockets for S&H 1 and S&H 2 (maybe less interesting) ? here is a panel project... |
Nice panel funyfarm! Is it Frac? I can't tell. Sorry I can't help with your questions. Haven't started on this build yet. |
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Photon
Joined: Mar 22, 2005 Posts: 363 Location: Boston
Audio files: 1
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Posted: Wed Aug 19, 2009 9:11 am Post subject:
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Does anyone know the value of the slew pot for board four?
[*edit*] Found it. 10K on the original schematic. |
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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Mon Aug 31, 2009 12:43 am Post subject:
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Romeo,
Hi, I've finished my boards 3 and 4. I just need to kludge the fixes onto board 4 which I'm hoping will clear up the initial problems I was having.
I now moving on to board 2. I'm looking at your revised PCB layout, and I see that the '266-2' script is now non-reversed on the artwork--which suggested to me that the PCB needed to be mirrored before etching-- so that the '266-2' script comes out non-reversed after being transfered. But, I it doesn't seem like this will give the proper pin out to the ICs. I'm a bit confused. Usually, on etch ready artwork, all of the script is in reverse-- so that it comes out correct when transfered.
Isn't the etch artwork press'n'peel ready as is? So, shouldn't the 266-2 script be in reverse, and not non-reversed as it is currently? Can you take a look at what I'm saying? |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Mon Aug 31, 2009 11:12 am Post subject:
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Ugh.... Hi Eric... The board layout is already reversed, as it should be. The number is not. No idea why I did that. I'll change it and upload it to avoid further confusion.
ericcoleridge wrote: | Romeo,
Hi, I've finished my boards 3 and 4. I just need to kludge the fixes onto board 4 which I'm hoping will clear up the initial problems I was having.
I now moving on to board 2. I'm looking at your revised PCB layout, and I see that the '266-2' script is now non-reversed on the artwork--which suggested to me that the PCB needed to be mirrored before etching-- so that the '266-2' script comes out non-reversed after being transfered. But, I it doesn't seem like this will give the proper pin out to the ICs. I'm a bit confused. Usually, on etch ready artwork, all of the script is in reverse-- so that it comes out correct when transfered.
Isn't the etch artwork press'n'peel ready as is? So, shouldn't the 266-2 script be in reverse, and not non-reversed as it is currently? Can you take a look at what I'm saying? |
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ericcoleridge
Joined: Jan 16, 2007 Posts: 889 Location: NYC
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Posted: Mon Aug 31, 2009 12:50 pm Post subject:
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vtl5c3 wrote: | The board layout is already reversed, as it should be. The number is not. No idea why I did that. I'll change it and upload it to avoid further confusion. |
OK, great. Thats what I thought, but I wanted to double check with you before printing out a PCB. Thanks for helping me clear this up! |
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vtl5c3
Joined: Sep 08, 2006 Posts: 425 Location: PDX
Audio files: 13
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Posted: Mon Aug 31, 2009 6:13 pm Post subject:
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I fixeded the layout files and uploaded them. Hopefully I didn't instroduce any new erros.
ericcoleridge wrote: | vtl5c3 wrote: | The board layout is already reversed, as it should be. The number is not. No idea why I did that. I'll change it and upload it to avoid further confusion. |
OK, great. Thats what I thought, but I wanted to double check with you before printing out a PCB. Thanks for helping me clear this up! |
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inform3r
Joined: Sep 03, 2006 Posts: 59 Location: nyc
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Posted: Sat Oct 03, 2009 1:38 pm Post subject:
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These boards are in my lineup for the next etching session I do. Has anyone gotten Board 4 to work? This (for me) is one of the most amazing DIY projects! I'm really hoping we can get a fully functioning 266 SOU out of this.
Any updates on people's work with this are extremely welcome. So far, there's confirmation on this thread of Boards 1, 2 and 3 working just fine. Anyone get #4 going yet?
Best Regards,
John |
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billy pilgrim
Joined: Feb 12, 2008 Posts: 36 Location: nyc
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Posted: Sat Oct 03, 2009 6:03 pm Post subject:
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I've got all 4 boards working great.......
inform3r wrote: | These boards are in my lineup for the next etching session I do. Has anyone gotten Board 4 to work? This (for me) is one of the most amazing DIY projects! I'm really hoping we can get a fully functioning 266 SOU out of this.
Any updates on people's work with this are extremely welcome. So far, there's confirmation on this thread of Boards 1, 2 and 3 working just fine. Anyone get #4 going yet?
Best Regards,
John |
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inform3r
Joined: Sep 03, 2006 Posts: 59 Location: nyc
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Posted: Tue Oct 06, 2009 2:28 pm Post subject:
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billy pilgrim wrote: | I've got all 4 boards working great.......
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Wow! That's fantastic news! Was it a bumpy road or a standard affair? If you ran into any problems can you give us current 266 builders some tips?
BTW, which etching files did you use, because recently Romeo re-uploaded them because of a discrepancy with the whole 'mirror-image' issue, etc... I'm so psyched to fire up the 'ole iron now.
Please, do tell all!
Regards,
John |
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billy pilgrim
Joined: Feb 12, 2008 Posts: 36 Location: nyc
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Posted: Sat Oct 10, 2009 8:27 pm Post subject:
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John,
I think the few build issues have been addressed now and the files are solid.
I made all 4 boards the same size so they would easily bolt together in a sandwich. Also I modified the FRV to use the Electric Druid noise source which works very well.
It's not too difficult at all so fire it up !
Wow! That's fantastic news! Was it a bumpy road or a standard affair? If you ran into any problems can you give us current 266 builders some tips?
BTW, which etching files did you use, because recently Romeo re-uploaded them because of a discrepancy with the whole 'mirror-image' issue, etc... I'm so psyched to fire up the 'ole iron now.
Please, do tell all!
Regards,
John[/quote] |
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