| If I'd make a string chorus PCB, what kind of multi-BBD circuit would you prefer? |
| Solina style (also: Crumar Performer, Böhm Phasing Rotor, and others) |
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62% |
[ 28 ] |
| ARP Omni style |
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13% |
[ 6 ] |
| Elka Synthex 4 BBD circuit |
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11% |
[ 5 ] |
| other (please name in thread) |
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6% |
[ 3 ] |
| I would want neither - it's old fashioned and overused, and if I need it, there are digital FX boxes |
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6% |
[ 3 ] |
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| Total Votes : 45 |
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Usine Karate
Joined: Jun 09, 2007
Posts: 64
Location: Hackney Wick
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 Posted: Tue Dec 18, 2007 10:49 am Post subject:
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| Got my boards today, Merry Christmas everybody!!!! |
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gavgomad
Joined: Jan 29, 2006
Posts: 69
Location: Canada
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| Posted: Wed Dec 19, 2007 11:24 am Post subject:
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Hey all! Part of the Canadian contingent (yours truly) has received his package of joy from JH!
Cheers all, and happy hols! 
Gav. |
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Stavros
Joined: Oct 30, 2007
Posts: 36
Location: Athens-Greece
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| Posted: Thu Dec 20, 2007 1:34 pm Post subject:
Potentiometers |
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I can get locally (Greece) ‘Piher’ potentiometers, shield in plastic casing. Would they be OK or it would be better to try get ‘Alpha’ Potentiometers in metal casing?
Best Regards and Merry Christmas to all.
SG |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Thu Dec 20, 2007 4:11 pm Post subject:
Re: Potentiometers |
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| Stavros wrote: | I can get locally (Greece) ‘Piher’ potentiometers, shield in plastic casing. Would they be OK or it would be better to try get ‘Alpha’ Potentiometers in metal casing?
Best Regards and Merry Christmas to all.
SG |
Any pot with the required value will do.
(Personally I'm not a big fan of Piher pots, though.)
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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b-funk
Joined: Jul 17, 2007
Posts: 193
Location: Berlin
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| Posted: Thu Dec 20, 2007 5:39 pm Post subject:
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hi jürgen,
i started soldering the solina board today, and it is like a charm 
really cool...
there are just some resistors values left which i didn´t have at hand, but i´m pretty sure i can put the chorus under the christmas tree for myself...
one question though: do the bc560s need to be matched, or doesn´t it matter?
best wishes,
tobias
ps: merry christmas to all the freaks!! |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Thu Dec 20, 2007 5:46 pm Post subject:
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| b-funk wrote: |
one question though: do the bc560s need to be matched
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No. These are just emitter followers, used for sallen key low pass filters.
You could probably use _any_ silicon small signal pnp transistor with C-B-E pinout here.
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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b-funk
Joined: Jul 17, 2007
Posts: 193
Location: Berlin
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| Posted: Thu Dec 20, 2007 6:28 pm Post subject:
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| cool, thank you jürgen... |
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The Alison Project
Joined: Jul 21, 2006
Posts: 187
Location: Canada
Audio files: 2
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Luka
Joined: Jun 29, 2007
Posts: 1003
Location: Melb.
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chriswilliams
Joined: May 17, 2005
Posts: 17
Location: Perth, Western Australia
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| Posted: Mon Jan 07, 2008 3:35 am Post subject:
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| I've got mine too! Thanks and Happy New Year |
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bugbrand
Joined: Nov 27, 2005
Posts: 846
Location: Bristol, UK
Audio files: 1
G2 patch files: 1
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Posted: Tue Jan 08, 2008 4:49 am Post subject:
Subject description: !! |
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I'm hoping to get things to a testing stage today. Its taken surprisingly long to build the PCBs - I think 'cos they are so densely packed - but there's nothing too tricky with the building.
I'm glad you've gone with SMD bypass caps - its a real eye opener! I'd been meaning to investigate and this gave me the suitable kick-up-the-ass. And, it turns out that its a very simple method (as long as you've got tweezers!). This is very inspiring - thanks Jurgen!
The only big thing left to figure is how to power a little JFET buffer for hi-impedence input - I want to have this switchable on the input so it can be used fine for guitar etc. I've got to look at the schems a bit more, but I think it should be possible to tap off the rectifier diodes to make a little positive regulator for this (does this sound reasonably reasonable?!) - anyways, testing the ideas today! Otherwise I guess I must figure it using Gnd and -ve supply - sure its possible, I just got a little confused..
_________________
http://www.bugbrand.co.uk
http://www.bugbrand.blogspot.com |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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Posted: Tue Jan 08, 2008 5:04 pm Post subject:
Subject description: !! |
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| bugbrand wrote: | I'm hoping to get things to a testing stage today. Its taken surprisingly long to build the PCBs - I think 'cos they are so densely packed - but there's nothing too tricky with the building.
I'm glad you've gone with SMD bypass caps - its a real eye opener! I'd been meaning to investigate and this gave me the suitable kick-up-the-ass. And, it turns out that its a very simple method (as long as you've got tweezers!). This is very inspiring - thanks Jurgen!
The only big thing left to figure is how to power a little JFET buffer for hi-impedence input - I want to have this switchable on the input so it can be used fine for guitar etc. I've got to look at the schems a bit more, but I think it should be possible to tap off the rectifier diodes to make a little positive regulator for this (does this sound reasonably reasonable?!) - anyways, testing the ideas today! Otherwise I guess I must figure it using Gnd and -ve supply - sure its possible, I just got a little confused.. |
You could simply increase the resistor values of the input amp.
Increasing the impedance by a factor of 10 (1Meg input, 2.2Meg feedback) should work. You should then omit the inout level pot (maybe make the feedback resistor a 2.2Meg log potentiometer instead).
Untested - but should work.
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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bugbrand
Joined: Nov 27, 2005
Posts: 846
Location: Bristol, UK
Audio files: 1
G2 patch files: 1
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6079smith
Joined: Jan 18, 2007
Posts: 95
Location: Mark of the Dane
Audio files: 4
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| Posted: Wed Jan 09, 2008 4:05 am Post subject:
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| I'm just curious, are there any PCB's left? I'd like to try my hand at this project (if there any TDA1022's left on the planet!) |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Wed Jan 09, 2008 8:36 am Post subject:
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| 6079smith wrote: | | I'm just curious, are there any PCB's left? |
Plenty. Just send an official order mail.
(It may take a few days before I'm answering. I'm currently sick at home, and my own little pcb business will also rest as long as I don't work for my employer.)
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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6079smith
Joined: Jan 18, 2007
Posts: 95
Location: Mark of the Dane
Audio files: 4
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| Posted: Wed Jan 09, 2008 9:32 am Post subject:
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It seems as everyone's ill at the moment, we've just gotten over the 'flu... hope you get well soon.
Now to investigate some BBD's... |
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b-funk
Joined: Jul 17, 2007
Posts: 193
Location: Berlin
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| Posted: Wed Jan 09, 2008 3:11 pm Post subject:
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so, after a long time i worked again on the solina board, and mostly finished it.
just the transformer is missing.
now my question: how much current is the circuit approx drawing? i have a 18vac/250ma transformer here. will this be enough, or should i get a stronger one?
best wishes,
tobias. |
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bugbrand
Joined: Nov 27, 2005
Posts: 846
Location: Bristol, UK
Audio files: 1
G2 patch files: 1
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| Posted: Thu Jan 10, 2008 2:51 am Post subject:
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Hey Tobias -- the BOM says the fuse required is 200mA so I'd presume your AC adaptor should be fine.
I haven't finished the boxes either yet due to general flu-ish-ness. Darn its annoying.
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http://www.bugbrand.blogspot.com |
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b-funk
Joined: Jul 17, 2007
Posts: 193
Location: Berlin
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| Posted: Thu Jan 10, 2008 4:08 am Post subject:
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thanks bug - i presume that too, but ithought i better ask. you never know...
and yeah, the flu - this damn thing forces me to stay in bed, instead of soldering. too bad... |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon Jan 21, 2008 2:31 pm Post subject:
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| b-funk wrote: | how much current is the circuit approx drawing? i have a 18vac/250ma transformer here. will this be enough, or should i get a stronger one?
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I measured 115mA on my prototype.
That value depends on the exact AC voltage, the load the FX is driving, and it may be a little off because of the crest factor and my multimeter's ability to measure true RMS.
But the 250mA is plenty, for sure.
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: Thu Jan 24, 2008 4:45 pm Post subject:
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I've made an update of my triple chorus page:
http://www.jhaible.heim.at/triple_chorus/triple_chorus.html
Picture of my 2nd prototype (in 19" 1U enclosure)
Links to 3rd party documentation (front panel designs, BOMs, etc.)
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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whomper
Joined: Dec 15, 2007
Posts: 201
Location: Israel
Audio files: 2
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| Posted: Sat Jan 26, 2008 7:25 am Post subject:
Component Replacements |
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Hi,
I would like to check with you whether the following components are proper replacements for the ones listen in the BOM:
1. CD4011 -> HEF4011BP
2. LM1458 -> 4558P OR CHN4558P
Thanks,
Whomper |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sat Jan 26, 2008 11:32 am Post subject:
Re: Component Replacements |
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| whomper wrote: | Hi,
I would like to check with you whether the following components are proper replacements for the ones listen in the BOM:
1. CD4011 -> HEF4011BP
2. LM1458 -> 4558P OR CHN4558P
Thanks,
Whomper |
1. Yes the HEF4011BP is the Philips version of that chip; it will work.
2. No - 4558 is not the same as 1458. It *might* work, but I have not tested it. The 1458 is quite common, and also made by different manufacturers. MC1458, for instance.
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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bugbrand
Joined: Nov 27, 2005
Posts: 846
Location: Bristol, UK
Audio files: 1
G2 patch files: 1
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| Posted: Mon Jan 28, 2008 3:02 am Post subject:
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Hey,
Just to report that I delivered the first pedal last night ---- there was a very very big smile from the receiver!
We tried the chorus with a proper Solina and very much liked sound - absolutely the same! But, of course, there's loads of other possibilities too!
The 3band EQ setting is very powerful - the Mid band, when cranked, seemed to really emphasise lovely harmonic content. Though, even with the treble cranked there seemed to be less of the very high end present. Am I right in thinking the EQ section was inspired by a particular keyboard type?
I added Depth dials to each modulator section as detailed on Jurgen's page, plus a 3 way switch (one of those C&K type On.On.On switches) to allow just Chorus, just Vibrato or both (again, using details off Jurgen's page -- 100u caps to ground). These extras allow so many extra and more subtle settings to be dialed in.
The only bad-ish was when we tried guitar into it and found the noise floor to be quite bad -- I'd added a little hi impendence buffer circuit, switchable on the input, but it turned out that the input level really needs to be high (ie line, not guitar) - when we added a boost pedal in front, keeping the levels higher, the resulting sounds were super lovely -- in fact, I had to excuse myself after a while 'cos my mate would have quite happily played for hours!
Overall results = freaking awesome!
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http://www.bugbrand.blogspot.com |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon Jan 28, 2008 1:48 pm Post subject:
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Great looking stomp box!
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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