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numbertalk
Joined: May 05, 2008
Posts: 992
Location: Austin, TX
Audio files: 5
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 Posted: Wed Sep 10, 2008 6:30 am Post subject:
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Good to hear - wasn't looking forward to desoldering those.  Thanks!
| jhaible wrote: | | numbertalk wrote: | Thanks for the reply on the transformer.
1 more question: if I have 2 1000uf caps soldered in for using circuit with a wall wart, do I need to replace these with the 470uf caps when changing to dual secondary winding transformer - any problems with just leaving in the 1000uf caps? |
No - 1000u are fine.
The larger (within reason), the better.
JH. |
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Luka
Joined: Jun 29, 2007
Posts: 1003
Location: Melb.
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| Posted: Tue Nov 11, 2008 1:35 pm Post subject:
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im finally starting my first JH project! Now school is over i have time... anyway... I'm hunting lm741s and I noticed that futurlec have LM741CH for $2.80 a piece and LM741CN for $0.30
I checked the datasheet and can only find the difference between Lm741 and Lm741C varieties, not the N/H difference. Does anyone know if there will be a big difference between these varieties?
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problemchild
melbourne australia
http://cycleofproblems.blogspot.com/
http://www.last.fm/user/prblmchild |
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numbertalk
Joined: May 05, 2008
Posts: 992
Location: Austin, TX
Audio files: 5
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| Posted: Tue Nov 11, 2008 1:50 pm Post subject:
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I used these 741CNs from Mouser for .54 a piece:
http://www.mouser.com/Search/ProductDetail.aspx?R=UA741CNvirtualkey51120000virtualkey511-UA741CN
| Luka wrote: | im finally starting my first JH project! Now school is over i have time... anyway... I'm hunting lm741s and I noticed that futurlec have LM741CH for $2.80 a piece and LM741CN for $0.30
I checked the datasheet and can only find the difference between Lm741 and Lm741C varieties, not the N/H difference. Does anyone know if there will be a big difference between these varieties? |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Wed Nov 12, 2008 12:39 am Post subject:
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| Luka wrote: | im finally starting my first JH project! Now school is over i have time... anyway... I'm hunting lm741s and I noticed that futurlec have LM741CH for $2.80 a piece and LM741CN for $0.30
I checked the datasheet and can only find the difference between Lm741 and Lm741C varieties, not the N/H difference. Does anyone know if there will be a big difference between these varieties? |
You want them in 8-pin DIL package. (Not the expensive metal can package.)
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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Luka
Joined: Jun 29, 2007
Posts: 1003
Location: Melb.
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neandrewthal
Joined: May 11, 2007
Posts: 672
Location: Canada
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| Posted: Tue Nov 18, 2008 2:49 pm Post subject:
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| jhaible wrote: | | numbertalk wrote: | Thanks for all the info. Wooster, got those heat sinks and you're right, they fit perfectly.
Another question - what exactly do the Rate and Amount inputs expect? I see that Bill & Will put "no cv!" on their panel, so these don't take CV, right? So are these for an expression pedal, something like the Moog EP-2? |
For a pedal that has a potentiometer inside, and a TRS jack, with the following wiring:
ccw end - sleeve
cw end - ring
wiper - tip
I think many pedals are wired like this.
(Yamaha pedals are *not* - they have ring and tip swapped.)
You have to try a pedal to see if it does what you want it to do.
The pot value, active angle (what part of the potentiometer's full range is actually used in the pedal construction) all have an influence on the response of the pedal.
JH. |
So the "Never CV here" is because inserting a mono plug would short +V to ground of the module on the other end of the cord, right? What if I just used a mono tip-sleeve jack and left off this connection. Then could I use CV as normal?
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" I went through quite a few trannies til I found one I liked" - Wild Zebra |
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Luka
Joined: Jun 29, 2007
Posts: 1003
Location: Melb.
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| Posted: Sat Nov 22, 2008 4:12 pm Post subject:
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quick question.. will this run at 12v?
what would you need to change to run at 12?
(thinking it might be the lamp rails)
im just wondering as i cant seem to find small format 18/18 toroids at our local supplier, they stop at 15/15. im trying to make a moogerfooger style case for this and if i have to chuck in a super huge transformer the size of the box will have to blow out.
this is the toroid i would like to use
http://www.altronics.com.au/index.asp?area=item&id=M4630
are there any other options without using wallworts?
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problemchild
melbourne australia
http://cycleofproblems.blogspot.com/
http://www.last.fm/user/prblmchild |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sat Nov 22, 2008 4:32 pm Post subject:
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| neandrewthal wrote: |
So the "Never CV here" is because inserting a mono plug would short +V to ground of the module on the other end of the cord, right? What if I just used a mono tip-sleeve jack and left off this connection. Then could I use CV as normal? |
Yes. But the CV range would be a little unusual ... centered around half the positive supply voltage instead of GND ...
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 Nov 22, 2008 4:36 pm Post subject:
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| Luka wrote: | quick question.. will this run at 12v?
what would you need to change to run at 12?
(thinking it might be the lamp rails)
im just wondering as i cant seem to find small format 18/18 toroids at our local supplier, they stop at 15/15. im trying to make a moogerfooger style case for this and if i have to chuck in a super huge transformer the size of the box will have to blow out.
this is the toroid i would like to use
http://www.altronics.com.au/index.asp?area=item&id=M4630
are there any other options without using wallworts? |
It won't run at 12V. That would require a major redesign.
It's quite likely that the 15V AC are enough to get the +/-15V DC, as long as you have nominal mains voltage.
But why do you want to use a transformer intended for PCB mount?!
That one looks better:
http://www.altronics.com.au/index.asp?area=item&id=M4918A
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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Luka
Joined: Jun 29, 2007
Posts: 1003
Location: Melb.
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numbernone
Joined: Aug 16, 2006
Posts: 477
Location: new york city
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| Posted: Fri Dec 05, 2008 4:05 pm Post subject:
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OOOPS Like a dumbass I purchased a sleeve of UA741s rather than LM741s.
From my uneducated research they seem to be pretty comparable, BUT maybe there is something I am missing??
Do I need new chips? |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Fri Dec 05, 2008 4:20 pm Post subject:
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| numbernone wrote: | OOOPS Like a dumbass I purchased a sleeve of UA741s rather than LM741s.
From my uneducated research they seem to be pretty comparable, BUT maybe there is something I am missing??
Do I need new chips? |
You don't need new chips.
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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blue hell
Site Admin
Joined: Apr 03, 2004
Posts: 24461
Location: The Netherlands, Enschede
Audio files: 297
G2 patch files: 320
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| Posted: Fri Dec 05, 2008 4:25 pm Post subject:
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| numbernone wrote: | | Do I need new chips? |
No, you're OK, a 741 is a 741 and the prefix is just a manufacturer code really.
_________________
Jan
also .. could someone please turn down the thermostat a bit.
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numbernone
Joined: Aug 16, 2006
Posts: 477
Location: new york city
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| Posted: Fri Dec 05, 2008 6:44 pm Post subject:
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Great, I had a feeling but...
JH, any more Compact A boards lying around over there with yo?. I will be interested in having at least 1 more. |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sat Dec 06, 2008 3:18 am Post subject:
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| numbernone wrote: | Great, I had a feeling but...
JH, any more Compact A boards lying around over there with yo?. I will be interested in having at least 1 more. |
Yes, I still have boards. (No more LDRs, though - but I heard these are available a lot more easily than at the time when I started this project.)
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: Wed Dec 10, 2008 2:45 pm Post subject:
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There are three 2K4 Resistors needed, i have 2K43 . Can i use those ?
It is R54, R58, those are both to Ground near the Relay , and then R23 near the lamp.
hmmm, should be fine with 2K43, isn't it ? |
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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: Wed Dec 10, 2008 2:50 pm Post subject:
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ahh, another thing:
i have populated the PSU parts partially, but i will power from the MOTM connector.
I have populated all Resistors and all diodes allready ( but nothing more ). Do i have to desolder those ?
( no LM337/317, no fuse, no 470µF ) |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Wed Dec 10, 2008 2:52 pm Post subject:
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| Funky40 wrote: | There are three 2K4 Resistors needed, i have 2K43 . Can i use those ?
It is R54, R58, those are both to Ground near the Relay , and then R23 near the lamp.
hmmm, should be fine with 2K43, isn't it ? |
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 Dec 10, 2008 2:56 pm Post subject:
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| Funky40 wrote: | ahh, another thing:
i have populated the PSU parts partially, but i will power from the MOTM connector.
I have populated all Resistors and all diodes allready ( but nothing more ). Do i have to desolder those ?
( no LM337/317, no fuse, no 470µF ) |
They probably won't hurt, but why not cut them away with diagonal pliers?
(much easier than desoldering)
I just did the same thing converting a Tau board with PSU for Dim TD use: It's a matter of a few seconds.
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: Wed Dec 10, 2008 3:00 pm Post subject:
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| jhaible wrote: | They probably won't hurt, but why not cut them away with diagonal pliers?
JH. |
good Idea ! Thanks alot ! |
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janvanvolt
Joined: Nov 24, 2005
Posts: 285
Location: Mainz, Germany
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| Posted: Mon Dec 15, 2008 7:40 pm Post subject:
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Seems i need some hint(s) as i finished my Schulte Phaser today. It's the MOTM Variant with the "large" Lamp.
Facts:
- Bypass on/off works
- Lamp (the big one) is working and showing the 'phasing'
- I cannot hear a phasing effect 
So here are my questions:
- The Lamps on the PCB: do i should see light ?
- How does Amount need to be mounted on the Switchcraft jack ? (1 to ground, 2 to steady and 3 to switched??)
- What about the RATE JACK ? (mounting)
- Any way to further test ?
_________________
Homepage - http://www.czmok.de
My dIY - http://diy.czmok.de
Film/Music - http://gfm.me |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon Dec 15, 2008 11:51 pm Post subject:
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| unit-sound wrote: | Seems i need some hint(s) as i finished my Schulte Phaser today. It's the MOTM Variant with the "large" Lamp.
Facts:
- Bypass on/off works
- Lamp (the big one) is working and showing the 'phasing'
- I cannot hear a phasing effect
So here are my questions:
- The Lamps on the PCB: do i should see light ?
- How does Amount need to be mounted on the Switchcraft jack ? (1 to ground, 2 to steady and 3 to switched??)
- What about the RATE JACK ? (mounting)
- Any way to further test ? |
http://www.jhaible.heim.at/compact_clone/jh_krautrock_phaser_sch.pdf
Shows the connectors (including "Amount") drawn in a way to resemble their physical appearance, as seen from the top of the PCB:
Left pin = sleeve
Middle pin = tip
Right pin = ring + switch contact for tip.
If you don't use a jack, jumper middle pin to right pin.
For phasing effect, lamp should grow light and dim periodically.
Ambient light should be shut off (enclosure etc.)
Modulation pot (= wet / dry mix) should be in 50% position.
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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janvanvolt
Joined: Nov 24, 2005
Posts: 285
Location: Mainz, Germany
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| Posted: Tue Dec 16, 2008 6:55 pm Post subject:
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| jhaible wrote: |
http://www.jhaible.heim.at/compact_clone/jh_krautrock_phaser_sch.pdf
Shows the connectors (including "Amount") drawn in a way to resemble their physical appearance, as seen from the top of the PCB:
Left pin = sleeve
Middle pin = tip
Right pin = ring + switch contact for tip.
If you don't use a jack, jumper middle pin to right pin.
For phasing effect, lamp should grow light and dim periodically.
Ambient light should be shut off (enclosure etc.)
Modulation pot (= wet / dry mix) should be in 50% position.
JH. |
a) what about the connection at AMOUNT jack ? i see a drawed arrow at the amount jack, but not on the RATE jack ?
b) the connected 'LAMP' is light and dimming, but not the other two lamp's on the PCB itself.
there is no ambient light as i cover the open spaces on the rack with paper.
i will re-check wiring,
any troubleshooting idea ? especially why the lamps on the board are not getting lit.
_________________
Homepage - http://www.czmok.de
My dIY - http://diy.czmok.de
Film/Music - http://gfm.me |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Wed Dec 17, 2008 12:38 am Post subject:
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| unit-sound wrote: | | jhaible wrote: |
http://www.jhaible.heim.at/compact_clone/jh_krautrock_phaser_sch.pdf
Shows the connectors (including "Amount") drawn in a way to resemble their physical appearance, as seen from the top of the PCB:
Left pin = sleeve
Middle pin = tip
Right pin = ring + switch contact for tip.
If you don't use a jack, jumper middle pin to right pin.
For phasing effect, lamp should grow light and dim periodically.
Ambient light should be shut off (enclosure etc.)
Modulation pot (= wet / dry mix) should be in 50% position.
JH. |
a) what about the connection at AMOUNT jack ? i see a drawed arrow at the amount jack, but not on the RATE jack ? |
The Amount jack is normalized (as described above). The Rate jack is not.
| Quote: | | b) the connected 'LAMP' is light and dimming, but not the other two lamp's on the PCB itself. |
Ok - there lies the problem.
| Quote: | | any troubleshooting idea ? especially why the lamps on the board are not getting lit. |
Have you soldered in the to blank wire bridges near R39 ?
http://www.jhaible.heim.at/compact_clone/jh_krautrock_phaser_refdes.pdf
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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janvanvolt
Joined: Nov 24, 2005
Posts: 285
Location: Mainz, Germany
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| Posted: Thu Dec 18, 2008 7:15 am Post subject:
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a) i now soldered the missing wires.
b) i see now a "glowing" of the the 2 internal and the 1 external lamp
c) to get it right, the amount jack is a _normalizing_ jack while the Rate Jack is a stereo jack ?
d) i still don't hear the phasing effect as heart on your samples. I do not hear a difference between dry/wet signal, e.g. bypass/non bypass.
_________________
Homepage - http://www.czmok.de
My dIY - http://diy.czmok.de
Film/Music - http://gfm.me |
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