New at runoffgroove.com: Tri-Vibe

[FuzzyFool]

Hi guys,

Relatively new here - but been messing about building guitars and simple effects (Germanium Fuzz Faces / treble boosts etc.) for years, and only just started to look at more challenging (for me!) effects builds. 
Go easy on me - I don't really understand much about what I am doing electronics-wise - I can just about cope with discrete components - but this is my first foray into anything involving ICs. 

I have just finished putting together the tri-vibe - on a board I etched myself - but am having some "fun" trying to debug it.

I have triple checked all connections / tracks for shorts etc all electrolytic caps and diodes are correctly orientated - so can I now ask for some assistance from you electronics Gurus on here.

Symptoms:

Nothing at all audible with switch in central "vibe" position.
Clean audio getting thru on other two settings - but with no (or extremely subtle) vibe. Pots have no effect.
I am using a lin 10k pot for depth and a normal log 500k pot for rate with lugs 1 and 3 reversed as I can't easily find a C taper version - I am in the UK

I am using TL064CN, LM13700N, and NE5532P

Voltages on pins of U1-U3 seem mostly to be in the ball park with switch in vibe position and both pots about halfway - and I can list voltages if needs be.
Some of the voltages are a little hard to pin down as they fluctuate - I assume that is because they are supposed to?

However, pins 10 and 12 of the LM13700 seem low at 0.6V?

Any ideas?

Only component I was a little unsure of was the red LED - I used what I believe was a "normal" 5mm red led - not a superbright or high intensity one - is this critical.

Thanks in advance.

FF






 

[FuzzyFool]

Hey Guys,

Newb again.

checking my pin voltages against ones published on here - there may be some other issues - so I will put my measured values here - I have used "average" values for the values that fluctuate.

Battery out of circuit 9.2V

TL064

1    4.37
2    4.37
3    4.16
4    8.71
5    4.3
6    4.3
7    3.2
8    4.3
9    4.36
10  4.36
11  0
12  4.3
13  4.0
14  4.5

LM13600

1    1.26
2    5.2
3    4.55
4    4.55
5    7.5
6    0
7    7.5
8    6.6
9    2.23
10  0.6
11  8.66
12  0.6
13  4.63
14  4.61
15  5.28
16  1.26

NE5532

1    4.09
2    4.08
3    2.02
4    0
5    4.34
6    4.34
7    4.34
8    8.64

Any ideas would be greatly appreciated - I can't wait to get this thing working - on the basis of the sound clips it will be awesome!

Thanks

FF

[B Tremblay]

Which layout did you use?

Seems like the OTA sections aren't passing signal and you have some voltage measurements that don't match the normal ones (pins 5,7,8,9,10,12).  Recheck the connections and components.

[FuzzyFool]

HI,

I used the pcb and layout and  from the ROG site (pcb / layout by Andre Schaap / redrawn by John Lyons, following latest recommendations re using a NE5532 for U1)


Yep - will recheck everything again when I get home after work - I did check the pcb under high magnification when I etched it, and every solder joint as I made them - so I am pretty sure the conections are OK  - I will go through it all again to ensure I have not got any resistors values wrong.
I am confident of all the other components being correct / oriented correctly.

Er.....what's an OTA?

Told you I was new to this!

Thanks

FF

[B Tremblay]

OTA=operational transconductance amplifier (the LM13600 stages)

[FuzzyFool]

All is now well! 

I obviously didn't check the connections well enough - problem was a dry solder joint on the lm13700 ic socket.

Just gotta persuade my wife to go watch tv downstairs so I can play my guitar!!!

FF

[flo]

I've just finished building a TriVibe using a PCB made by André:
http://i752.photobucket.com/albums/xx161/andre_schaap/Tri-VibePCBLayout.jpg

See André's build which I used as example:
http://www.diystompboxes.com/smfforum/index.php?topic=81099.msg672534#msg672534
http://www.diystompboxes.com/smfforum/index.php?topic=81099.msg673067#msg673067

I made this drill plan and build it into a BB enclosure which was pretty tight.


Near U1B are two 1uF caps. I used 220nF MKT caps instead because I think that's large enough for all low frequencies to pass.

Picts:





For the front I think I'' use this design inspired by André's front design (font is "Brushed Script"):
http://home.online.nl/fvrijswijk/guitar_electronics_diy/tri_vibe_vibrato/Tri-VibeFrontDesign.bmp

Samples:
http://www.soundclick.com/flosounds

First impressions:
Especially the Swirl position (like a 2 stage phaser) with Speed on 1 and Depth open sounds great!
The Vibe position (vibrato) is not really my thing but with Depth on 3 and Speed on 3 it is a nice vibrato. Good for surf or blues ("Things that I used to do" intro - SRV) I guess.
The LFO is really amazing. This one should be in any phasers, flangers etc instead of a triangle-wave!
The sound with Depth closed in Vibe mode is different than in bypass, more highs and a little less mids. Perhaps a bit too much different, I'm loosing a bit of "tone"...

Wish:
Tri Vibe LFO and 4 delay stages with Univibe caps instead of 2 stages, with a Mix pot instead of the switch, in a BB enclosure.

[alparent]

Here's a video I've made of the pedal. Hope it serves to you: http://www.youtube.com/watch?v=jdEsIIPE1Sw

Regards,
Fernando.-

Can you explain the 3 LED in the telephone pole?

MAN your etchings are AMAZING!  You got talent man! If I only had 1/10 of your talent!
What software are you using? Are you a graphics designer or something?

Your enclosure are works of art.

[azrael]

Can I get a tone out of this circuit kinda like Guns N Roses' Paradise City's intro? I think I might finally etch a PCB for this baby.

[Fuzz Aldryn]

Hi,

is there any way to get andres layout as a pdf? I know I did it with his jpeg in the past but I gave it away. Now it's a pain in the ass to get it scaled correctly with inkscape using the grid funktion. But what realy bugs me is that I get to many pixel artefacts around the traces.

Helge

[Scruffie]

Hi,

is there any way to get andres layout as a pdf? I know I did it with his jpeg in the past but I gave it away. Now it's a pain in the ass to get it scaled correctly with inkscape using the grid funktion. But what realy bugs me is that I get to many pixel artefacts around the traces.

Helge

Mr Lyons already performed such a service  http://www.basicaudio.net/Tri-VibePCBLayout.pdf

Gotta give thanks here to Andre' for his layouts, the man knows what I like in them.

[Fuzz Aldryn]

Hi,

is there any way to get andres layout as a pdf? I know I did it with his jpeg in the past but I gave it away. Now it's a pain in the ass to get it scaled correctly with inkscape using the grid funktion. But what realy bugs me is that I get to many pixel artefacts around the traces.

Helge

Mr Lyons already performed such a service  http://www.basicaudio.net/Tri-VibePCBLayout.pdf

Gotta give thanks here to Andre' for his layouts, the man knows what I like in them.

Thanks, but I already knew that layout. For my purposes and taste it's to big. So I'll gonna redraw Andres layout with sprint layout.

[Scruffie]

Hi,

is there any way to get andres layout as a pdf? I know I did it with his jpeg in the past but I gave it away. Now it's a pain in the ass to get it scaled correctly with inkscape using the grid funktion. But what realy bugs me is that I get to many pixel artefacts around the traces.

Helge

Mr Lyons already performed such a service  http://www.basicaudio.net/Tri-VibePCBLayout.pdf

Gotta give thanks here to Andre' for his layouts, the man knows what I like in them.

Thanks, but I already knew that layout. For my purposes and taste it's to big. So I'll gonna redraw Andres layout with sprint layout.

That isn't John Lyons modified layout, that's just Andre's one as a PDF that John Converted for someone so it should be the same size as the original? I assume for your purposes and tastes you mean a 1590B in which case, that's the right layout.

[Fuzz Aldryn]

Hi,

is there any way to get andres layout as a pdf? I know I did it with his jpeg in the past but I gave it away. Now it's a pain in the ass to get it scaled correctly with inkscape using the grid funktion. But what realy bugs me is that I get to many pixel artefacts around the traces.

Helge

Mr Lyons already performed such a service  http://www.basicaudio.net/Tri-VibePCBLayout.pdf

Gotta give thanks here to Andre' for his layouts, the man knows what I like in them.

Thanks, but I already knew that layout. For my purposes and taste it's to big. So I'll gonna redraw Andres layout with sprint layout.

That isn't John Lyons modified layout, that's just Andre's one as a PDF that John Converted for someone so it should be the same size as the original? I assume for your purposes and tastes you mean a 1590B in which case, that's the right layout.

If U C K! Yes, you're right! I don't know why, but I thought it was the link to the rog John Lyons layout. Sorry mate!

[Scruffie]

If U C K! Yes, you're right! I don't know why, but I thought it was the link to the rog John Lyons layout. Sorry mate!

Haha, not to worry, I made the same mistake myself originally. 

[soupbone]

I bought their "Neo-Vibe pcb.Is it similar to that?

[roseblood11]

Hi,

is there any way to get andres layout as a pdf? I know I did it with his jpeg in the past but I gave it away. Now it's a pain in the ass to get it scaled correctly with inkscape using the grid funktion. But what realy bugs me is that I get to many pixel artefacts around the traces.

Helge

I asked the same question a few weeks ago:

Hi!
Could someone post a scaled version of Andre Schaaps layout, please? Maybe as a pdf?
regards, Immo

And this was your -not very polite- answer:

... Oh Mann Immo!  Huh  Must be hard to use Inkscape "ctrl.+ shift + d" to make a 2,54mm grid to scale it hole to hole. And I'm pretty sure you know that trick form the other german speaking forum.  icon_rolleyes

mmmhh 

[Fuzz Aldryn]

... damals habe ich es auch hinbekommen - wie auch diesmal. Das Skalieren war und ist nicht mal so das Ding mit Inkscape. Aber die Artefakte der jpeg störten mich diesmal einfach zu sehr. Du unterschlägst allerdings dabei auch, dass genau zu der Zeit auf'm MD genau die Methode des Skalierens besprochen und erklärt wurde. ;-)
Aber wenn ich mal Zeit habe, werde ich das verdammt Layout nochmal mit Sprint routen, denn die Auflösung in der verlinkten pdf ist auch saumäßig - und ja, ich werde es irgendwo hochladen und posten.

[solderman]

If some one likes small, here is the layout and etc to fit in a 1590A and bigger boxes as well of cause

And in PDF allready

Project file
http://solderman.fatabur.se/Tri Vibe/Tri-Vibe Project file.pdf
PCB Without pour
http://solderman.fatabur.se/Tri Vibe/Tri Vibe PCB.pdf
PCB With Pour
http://solderman.fatabur.se/Tri Vibe/Tri Vibe PCB pours.pdf

[neil411]

Hi guys,

I put this one together after a hiatus from pedal building over the summer. I ran into a few issues that I have fixed, but I still can't seem to get the thing to swing.

I have very soft and slow oscillations and the pots don't seem to make any difference.

Here are my voltages:


Voltage V+ - 9.90 v

NE5532P - IC1
1 - 4.81
2 - 4.81
3 - 4.38
4 - 0
5 - 4.81
6 - 4.81
7 - 4.81
8 - 9.65


TL064CN - IC2
1 - 4.81
2 - 4.81
3 - 7.06
4 - 9.58
5 - 9.11
6 - 4.81
7 - 3.72
8 - 3.65 - 6.00
9 - 4.81
10 - 4.81
11 - 0
12 - 2.50 - 6.40
13 - 4.81
14 - 0.60 - 9.55


JRC13600D - IC3
1 - 1.28
2 - 5.7
3 - 5.04
4 - 5.05
5 - 5.90
6 - 0
7 - 5.90
8 - 4.70
9 - 5.38
10 - 6.59
11 - 9.67
12 - 6.58
13 - 5.04
14 - 5.04
15 - 5.70
16 - 1.28

Anyone see anything that stands out?

Thanks,