| Would you prefer one PCB with 3 VCOs a la JH-5A, or 1 VCO per PCB with more features |
| One PCB with Oscillator Driver and 3 VCO cores (like JH-5A - cheap!) |
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60% |
[ 60 ] |
| 1 PCB = 1 VCO (with many waveforms and inputs) |
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40% |
[ 40 ] |
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| Total Votes : 100 |
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Etaoin
Joined: Jun 30, 2005
Posts: 760
Location: Utrecht, NL
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 Posted: Wed Apr 15, 2009 10:59 pm Post subject:
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2n7 isn't harder to get than 2n2 (Banzai stock them), but as I had 3n3 in stock (and plenty of them) it seemed a waste if they would work just as well.
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davebr
Joined: Jun 09, 2007
Posts: 180
Location: portland, or
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Posted: Thu Apr 16, 2009 8:04 pm Post subject:
Living VCO
Subject description: Vibrato CV |
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Is the Vibrato CV for control of rate or depth?
The parts list has (3) 510K resistors. 510K is the standard value for 5% resistors.
The standard for 1% resistors is 511K. I assume 511K is correct? |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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Posted: Sun Apr 19, 2009 6:36 am Post subject:
Re: Living VCO
Subject description: Vibrato CV |
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| davebr wrote: | Is the Vibrato CV for control of rate or depth?
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Depth
| Quote: | The parts list has (3) 510K resistors. 510K is the standard value for 5% resistors.
The standard for 1% resistors is 511K. I assume 511K is correct? |
It's the same thing, really.
511k +/-1% means 506k ... 516k, after all.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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TekniK
Joined: Aug 10, 2008
Posts: 1062
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| Posted: Thu Apr 23, 2009 1:53 pm Post subject:
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| Juergen is it possible to order/pay a board but not have it send it untill ur varislope filter is done,so we safe 6e? |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Thu Apr 23, 2009 2:58 pm Post subject:
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| TekniK wrote: | | Juergen is it possible to order/pay a board but not have it send it untill ur varislope filter is done,so we safe 6e? |
I'm accepting combined orders, but only for older projects.
In the main shipping phase of the latest project, to also handle combined orders, would drive me mad, I'm afraid.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sat Apr 25, 2009 11:42 am Post subject:
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Boards are ready for shipping - invoices have been sent.
(Tobias - check your mailbox please - your mail came back to me.)
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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numbertalk
Joined: May 05, 2008
Posts: 979
Location: Austin, TX
Audio files: 5
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| Posted: Wed Apr 29, 2009 10:42 am Post subject:
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Hi JH,
I was looking over the documentation and had a couple questions.
1) Could you clarify what each of the H, F & S trimmers are exactly and how to properly calibrate each?
2) Any tips on setting the PW ADJ trimmer on each VCO circuit (i.e. how should the PW pot be set when trimming, what to look for exactly, etc...).
3) Do Q22 & Q23 need to be coupled with thermal compound? Just wondering based on their close proximity on the PCB.
4) Are the 2 trimmers for the octave up/down switch just to fine tune all 3 VCOs when switching the octave? You suggest breaking these out to the panel - do you expect these will need to be reset regularly, depending on how the master tune and each VCO's frequency controls are set each time you use this switch?
5) Finally, just wanted to verify the way the "track" switches work. When switched off for any of the 3 VCOs, that VCO will not be effected at all by portamento, vibrato, master frequency/octave up/down or the 2 driver V/Oct inputs, correct? And the driver out is just a sum of all of these voltages, correct, which could be used to drive another external VCO?
Thanks! Really looking forward to building this! |
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loss1234
Joined: Jul 24, 2007
Posts: 1533
Location: nyc
Audio files: 41
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Wed Apr 29, 2009 11:19 am Post subject:
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| numbertalk wrote: | Hi JH,
I was looking over the documentation and had a couple questions.
1) Could you clarify what each of the H, F & S trimmers are exactly and how to properly calibrate each?
2) Any tips on setting the PW ADJ trimmer on each VCO circuit (i.e. how should the PW pot be set when trimming, what to look for exactly, etc...).
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Rather than answering this here, I put it straight onto the project page:
http://www.jhaible.de/living_vcos/jh_living_vcos.html
| Quote: |
3) Do Q22 & Q23 need to be coupled with thermal compound? Just wondering based on their close proximity on the PCB.
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No. That's just for Vibrato Depth - not critical.
| Quote: | | 4) Are the 2 trimmers for the octave up/down switch just to fine tune all 3 VCOs when switching the octave? You suggest breaking these out to the panel - do you expect these will need to be reset regularly, depending on how the master tune and each VCO's frequency controls are set each time you use this switch? |
That was the idea when I built the JH-5, but in fact I never had to re-calibrate them.
| Quote: | 5) Finally, just wanted to verify the way the "track" switches work. When switched off for any of the 3 VCOs, that VCO will not be effected at all by portamento, vibrato, master frequency/octave up/down or the 2 driver V/Oct inputs, correct? And the driver out is just a sum of all of these voltages, correct, which could be used to drive another external VCO?
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Yes.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Wed Apr 29, 2009 11:21 am Post subject:
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Oh, and ... schematics are online now as well.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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numbertalk
Joined: May 05, 2008
Posts: 979
Location: Austin, TX
Audio files: 5
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| Posted: Wed Apr 29, 2009 12:00 pm Post subject:
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Perfect - thanks!
| jhaible wrote: | | numbertalk wrote: | Hi JH,
I was looking over the documentation and had a couple questions.
1) Could you clarify what each of the H, F & S trimmers are exactly and how to properly calibrate each?
2) Any tips on setting the PW ADJ trimmer on each VCO circuit (i.e. how should the PW pot be set when trimming, what to look for exactly, etc...).
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Rather than answering this here, I put it straight onto the project page:
http://www.jhaible.de/living_vcos/jh_living_vcos.html
| Quote: |
3) Do Q22 & Q23 need to be coupled with thermal compound? Just wondering based on their close proximity on the PCB.
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No. That's just for Vibrato Depth - not critical.
| Quote: | | 4) Are the 2 trimmers for the octave up/down switch just to fine tune all 3 VCOs when switching the octave? You suggest breaking these out to the panel - do you expect these will need to be reset regularly, depending on how the master tune and each VCO's frequency controls are set each time you use this switch? |
That was the idea when I built the JH-5, but in fact I never had to re-calibrate them.
| Quote: | 5) Finally, just wanted to verify the way the "track" switches work. When switched off for any of the 3 VCOs, that VCO will not be effected at all by portamento, vibrato, master frequency/octave up/down or the 2 driver V/Oct inputs, correct? And the driver out is just a sum of all of these voltages, correct, which could be used to drive another external VCO?
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Yes.
JH. |
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wicked1
Joined: Apr 24, 2009
Posts: 14
Location: stl
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| Posted: Thu Apr 30, 2009 3:43 pm Post subject:
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I noticed those dials have a brake on them. Is there a reason to include the brake? (I'm thinking they'd be useful if I was going to be moving the synth a lot, or something, but I won't)
thanks! |
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Adam-V
Joined: Jan 29, 2007
Posts: 300
Location: Australia
Audio files: 1
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| Posted: Thu Apr 30, 2009 3:55 pm Post subject:
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The "brake" is there to allow you to lock the dial in one position so as not to accidentally change it.
Cheers,
Adam-V
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Digitalis Effect | Fractured Symmetry (www.spiralsect.com) |
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wicked1
Joined: Apr 24, 2009
Posts: 14
Location: stl
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| Posted: Thu Apr 30, 2009 6:48 pm Post subject:
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Right, but Ive never used this style pot/knob (multi-turn) so am not sure if its something I'd usually want. Are they basically free spinning w/out it, so I could easily bump it and change it, or are they as tight as a normal pot?
It looks like I'd save about $18 by going w/ brake free. (~$6 per knob) |
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Adam-V
Joined: Jan 29, 2007
Posts: 300
Location: Australia
Audio files: 1
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| Posted: Thu Apr 30, 2009 10:29 pm Post subject:
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Most multi-turn dials I have used (and I haven't used any for the past 15 years mind you) spun quite freely - there was little or no resistance (pardon the pun!) when turning them.
Cheers,
Adam-V
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Digitalis Effect | Fractured Symmetry (www.spiralsect.com) |
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Etaoin
Joined: Jun 30, 2005
Posts: 760
Location: Utrecht, NL
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| Posted: Mon May 04, 2009 6:23 am Post subject:
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R145 and R146 are marked "100k" on the designator diagram, instead of R145 and R146.
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon May 04, 2009 6:53 am Post subject:
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| Etaoin wrote: | | R145 and R146 are marked "100k" on the designator diagram, instead of R145 and R146. |
Thank you!
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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Etaoin
Joined: Jun 30, 2005
Posts: 760
Location: Utrecht, NL
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| Posted: Mon May 04, 2009 11:47 am Post subject:
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Found a discrepancy between the BOM and the board; there are 15 x 10k and 3 x 510k in the BOM, but 14 x 10k and 4 x 510k on the board.
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon May 04, 2009 2:36 pm Post subject:
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| Etaoin wrote: | | Found a discrepancy between the BOM and the board; there are 15 x 10k and 3 x 510k in the BOM, but 14 x 10k and 4 x 510k on the board. |
Thanks again. I just replaced the BOM and also the refdes overlay.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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Etaoin
Joined: Jun 30, 2005
Posts: 760
Location: Utrecht, NL
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Tue May 05, 2009 1:46 pm Post subject:
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| Etaoin wrote: | I can report a set of working living VCOs 
Still with trimmers for most pots until I do a panel... |
Congratulations! That was fast!
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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Photon
Joined: Mar 22, 2005
Posts: 363
Location: Boston
Audio files: 1
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| Posted: Thu May 07, 2009 8:05 am Post subject:
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my apologies if this is obvious, but I'm a bit confused about the oscillator driver section...
If all 4 circuits are isolated electrically from each other, do you need to use patch cords to implement the driver features? |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Thu May 07, 2009 9:28 am Post subject:
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| Photon wrote: | my apologies if this is obvious, but I'm a bit confused about the oscillator driver section...
If all 4 circuits are isolated electrically from each other, do you need to use patch cords to implement the driver features? |
It's all in the documentation:
http://www.jhaible.de/living_vcos/jh_living_vcos.html (Wiring diagrams).
You can hard-wire the connections, use switches, and even use patchchords.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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Funky40
Joined: Sep 24, 2005
Posts: 875
Location: Swiss
Audio files: 1
G2 patch files: 5
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| Posted: Sat May 09, 2009 5:19 am Post subject:
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Hello Jürgen,
Can i use BC 550/560B instead of C ?
another question about those:
are there any Reasons to think that the ones from cheap(er) Places as Reichelt is, could be from bader quality ? |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sat May 09, 2009 9:44 am Post subject:
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| Funky40 wrote: | Hello Jürgen,
Can i use BC 550/560B instead of C ?
another question about those:
are there any Reasons to think that the ones from cheap(er) Places as Reichelt is, could be from bader quality ? |
It will most probably work, but I haven't tried it.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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