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Voodoo vibe or Pangea with Brejna's pcb.
This has been one of the most uncomplicated builds I have done. Altough it is not a simple build it just worked from the first instance. Great pcb and excellent design (thanks brejna)! not in the least by the fact that some of the more hard to obtain parts were included in the group buy.
It works really well. The cap selection pcb I etched myself and I used the caps recommended in the build doc. Good choice as they differ in a very nice way.

I have two things I would like to improve: 1- The cap switching pops when the pedal is just turned on. After you have switched it with the power on then it does not pop so much anymore. I am not sure which version of the switch I used, maybe I should have use a make before break? But I am not sure if that would fix it. Resistance to ground might influence the filter or not?
2- The volume of the tremelo is softer then the chorus and vibe. I guess getting that on the same level is not an easy fix?

Faceplate is a copperclad I etched and still needs some extra finish. Box is a 1790ns  size equivalent. Fits well. Relay switching by TH customs included in this design is great. i think I will use that more in some other builds.
I was looking for a long time for a voodoo vibe build project and iI am glad I found this.
Thanks to Brejna.

Dirtbag deluxe MN3005s on 15 volt

I had my dirtbag working and sounding really good but suddenly it was distorting.
I have know idea what caused it.
I can not get back to what I had.

IC 1
Pin1 6.06
Pin2  6.09
Pin3 5.94
Pin4 0
Pin5 5.52
Pin6 6.09
Pin7 6.08
Pin8 14.94

IC 2
Pin1 1.19
Pin2  1.81
Pin3 1.81
Pin4 0
Pin5 1.82
Pin6 1.80
Pin7 7.52
Pin8 1.82
Pin9 1.82
Pin10 7.39
Pin11 5.88
Pin12 1.83
Pin13 14.94
Pin14 1.81
Pin15 1.81
Pin16 0.64

IC 3
Pin1 6.06
Pin2  6.09
Pin3 5.95
Pin4 0
Pin5 5.88
Pin6 6.06
Pin7 6.07
Pin8 14.94

IC 4
Pin1 14.90
Pin2  7.48
Pin3 3.60
Pin4 3.60
Pin5 0
Pin6 7.48
Pin7 6.39
Pin8 0

IC 5
Pin1 14.90
Pin2  7.48
Pin3 3.93
Pin4 3.93
Pin5 0
Pin6 7.48
Pin7 7.43
Pin8 0

IC 6
Pin1 7.43
Pin2  7.39
Pin3 7.18
Pin4 0
Pin5 4.96
Pin6 5.12
Pin7 4.18
Pin8 14.94

IC 7
Pin1 ~
Pin2  7.84
Pin3 7.24-8.26
Pin4 0
Pin5 7.80
Pin6 7.43
Pin7 7.6-8.23
Pin8 14.94

IC 8
Pin1 6.06
Pin2  6.07
Pin3 5.88
Pin4 0
Pin5 6.72
Pin6 7.39
Pin7 7.39
Pin8 14.94

IC 9
Pin1 6.85
Pin2  8.02
Pin3 8.05
Pin4 14.95
Pin5 14.95
Pin6 14.95
Pin7 0
Pin8 0
Pin9 0
Pin10 7.48
Pin11 7.48
Pin12 0
Pin13 6.91
Pin14 14.95

I can not bias ic 4 with a clean signal. I know it is possible because it was like that before.
I am using 47k for r11 and r12 as that gives me a cleaner signal and less compressed and that way I have half powersupply on pin 7 and 10 of the Ne571.

Readings on IC 6 are a bit strange maybe?
I have changed all opamps and no change. i have changed the NE571 with another that I know is working well, also no change.

I have reflowed and reflowed my build. No change.

Any suggestions.

Thanks, marc

I have just finished, (With help from William/Moltenvoltage (thanks for that!)),a Delaytion to work with an Aquaboy deluxe with mn3101 and either 2 or 3 mn3005's. It works very well for both and is in fact very easy to do.
So tap tempo with the mv-64 chip works for a mn3005 delay.

When you use the Delaytion you actually bypass the ABDX clock and also the modulation section.
So now I have to decide if I am going to use it for the ABDX or an older Aquaboy with only 2 mn3005's   and box it up.

I finished my Dirtbag a long time ago and while I was working on a ABDX I was wondering if the darker repeats on this Dirtbag were not darker then necessary.
One of the suggestions Scrufie gave me while working on the ABDX was to be sure that the voltage on the output of the compander is half the powersupply at pin 13. That helped a lot or the ABDX's headroom.

I checked the voltages on the compander of the Dirtbag and they were quit a bit of. So I changed r11/r12 fom the recommended 68k to 47k  to get half the supply voltage and I also changed r42 to 10k.
That gave me already a better tone.

Then I fiddled with c14/c22 as Brian had suggested in another thread to change the filtering. Lowering C14 introduced too much noise for me but changing C22 to 22n works very well.
Now the Dirtbag sounds much clearer.
Worth trying.

I started a new thread on this although some of it came up in my questions on the ABDX moulation.

With a double delay board it works with 3 mn3005s.
I have used the double delay board for the original aquayboy wih the values for that.
The delay is quite a bit louder with that board. Brian already suggested changing the trimpot or R39 to deal with the louder repeats and the resulting early oscillation.

What i also notice is that with the delay board the repeats start to slowly sound worse almost as if there is a gate on the repeats that cuts of part of the sound.
This is not the case without the double delayboard and just 2 MN3005's. In that case the delay repeats an slowly gets darker.
The voltage on my MN3005's is normally 14.45 volt (14.80 at the roadrage board).
With the three MN3005's the voltage goes down to 14.30 volts.
Is the voltage dop is what causes that gating? R52 limits the voltage, should I change this?
Or is something else causing the gating...?

I changed T1 trimpot to 100k and changing R39 to 130k to deal with the louder signal and the early osillation on the feedbak pot but that makes the repeat signal gating worse. Is this because I am now adding resistance after the feedback pot and also after c31? or just beaues it is a lower signal?

The ABDX sound great with just two mn3005 but it would be great to get it working with the double delay board.

Thanks,
Marc

I have a ABDX with mn3005. the delay works well.
I can not get the modulation to work well.
I have a vtl5c3 for the vactrol now that replaced a ldr/led combo in hope of getting a better result.
The problem is that the delay cuts out when I turn the depth pot all the way up.
Changing r56 has some influence but it still cuts out. I have tried values in between 0-1m5 but I can not find a value that prevents the depth pot from cutting out the delay, when I set the depth pot in the almost full setting.
Changing the clock helps and then I can set a value for r56 that makes the depth pot work ok in the whole range but then when I turn the delay pot for a very short delay value and the depth pot full up the delay cuts out with the delay pot.

I have build an old Aquaboy before with the modulation add on board and had the same problem using an LDR/led combo. Never got it working well except by adding a trimpot in series with the depth pot. I could do this here to but it seems to me that that was no how it was designed. Any suggestions?

 I have a working deluxe aquaboy with two mn3005 and mn3101.
I would like to try the MV64 with that. Molten voltage does not have any experience with that. Anyone else any experience yet?
The Mv64 works 0-9 volt and i have the aquaboy running on 15 volt.

Thanks, Marc

When turning down the volume on my guitar I am experiencing quite a drop in volume and duller tone.
Gone with a buffer in front.

There is quite a bit written on the low impedance of the DMM and changing that by enlarging the input 100k resistor (with a 1m trimpot eg). If I want to make up for the then changed  gain can I do that by just putting a trimpot after the level pot?

I was also wondering if it was a deliberate choice to use 47uf and 22 uf at the blend pot instead of the 22uf and 10uf in other DMM schematics. Any experience with this?

The feedback control on my dirtbag works mainly from 12:00 to 3:00.
Before 12:00 it is basily one repeat and after 3:00/4:00 it goes into oscillation.
Is there any way to spread this out more evenly across the whole pot range?

The rest of the dirtbag (mn3005s) works really well.

Thanks
Marc

Is it possible to use a double delay board pcb intended for the aquayboy to add an extra mn3005 chip in a dirtbag?

Hi,

I have a roadrage hooked up to a dirtbag. On power up the sound is a little distorted and gradually that cleans up.

On power up the voltage from the roadrage to the dirtbag is 12.60 slowly going up to 14.00 volts max.
When not connected to the dirtbag the roadrage voltage reads 14.95volt.

The dirtbag draws 23ma and works fine from a regulated 15 volt power supply. It starts up right away and is not distorted on power up.

My conclusion is that the problem is in the roadrage. I replaced all capacitors. Orientation of caps is correct. Still the same result.
I am using LT1054, regulator is L7815CV diodes are as listed?

Where should i look now?

Thanks.

Hi,

I finished a dirtbag deluxe with mn3005.
It works. It sounds very good.

My build has the same delay time I hear on the video of other builds. I presume that that is what it will give. The most I get out of it is 470 ms.
When tested in a aquaboy the delay time I got with each individually was around 290ms. With the clock trim  in my aquaboy on max. I measured the delaytime by recording it and reading the time on my computer.

If I run my aquaboy with two v3205 I get a delay time that is clean with a time around 550-600ms. So much more.

I was wondering how I can get more out of the two mn3005 in the dirtbag.
Which one of the three parts (C41, R58 and delay pot) can I enlarge how much to extend the delay time?
How do they interact?
I have c41 242pf, R58 5k58 and delay pot 98.2k.

Thanks, Marc

Hi,

I build the Macheen.

It works. Sounds almost as the youtube movies most are referring to. My question regards the drive or input pot. As noted by others that pot does not move in the demo's.

In the max setting mine works as the demo video, but in turning down this pot reacts really strange.
It is not only noisy (crackle ok?) but works with what sound as drop outs and drops fast to a setting that does not deliver much usable sounds. I thought for a moment my pot was broken or the BS170. Checekd that and they are ok.
Is this how it should be?

thanks, Marc

Hi,

RG posted at DIY that he has the layout ready for a crybaby neovibe. He is not going to do pcb's but in his post he hint to looking for someone that might want to do this. http://www.diystompboxes.com/smfforum/index.php?topic=82999.20
Maybe something you could do Brian?

Marc

This is a very nice sounding pedal.

I would like to ad more low end to the Glitterati/BBpreamp. Only adjusting the input cap is not enough. Any suggestions?

I would also like to change the gain control. As it is it goes from clean to quit a fair amount of gain. Would it be possible to make that more gradually?

Thanks, Marc

HI,

I have trouble getting the mod board to work right.


I have posted this question on FSB as well but it seems nobody has any solution for this. There are some other posters that have the same experience. I hear no reaction of anyone that installed it with succes and how they did it.


The modulation board works. I can get deep modulation and a high speed if I want but at certain settings (towards the extreme) the delay suddenly cuts out. Then I have to move either the delay time knob or the modulation board to get it working again. Even if I bring the clock time down (which was suggested before to be able to use the extremes of the modulation) I have this same thing happening. I already added extra resistance (a 50k trimpot) after the modulation depth pot to control the modulation depth but that does not solve this cutting out.
Later I changed the LDR. Now I can use the full range without the delay cutting out on changing the delaytime or the mod depth, but on the mod depth lowest setting I still have modulation.

You can cut out the modulation by turnning up the modulation speed all the way as at that last bit the speed is so high that it cuts out (in a way this means tht the range of the speed is not good as well). In a way it seems as if it is not well adjusted. Both the depth and the speed of the mod board.

Question: I would like to be able to go from zero to full with the mod depth pot. How can I do that?
I would like the mod speed to reach its max at the max of that pot instead of cutting out. How can I do that?

Thanks, Marc

My experience was that the BBD was getting too much signal and that was causing the BBD to distort.
I replaced R15 with a trimpot to find out at what value the signal was loud enough and clean enough. Then I removed the trimpot and measured the value at wich the trimpot was set and used that value for the resistor at R15. So yes you can substitute R15 with a different value, but you have to find out what works for you. I ended up with 56k. So my suggestion is to socket R15.

Marc

Hi,

I have build the aquaboy based on Madbeans PCB.
I have used the double delay time board with two V3205's, MN3102 and NE570.

It is working, but I have a delayed signal that is louder then I think it should be.
Mix at noon puts the delay signal already way above the dry signal. Also I have some distortion on the delays.
Also the feedback starts oscillating at 1 o'clock. Way too early.
I checked all components and readings. R31 is 22k in my build.

I accidently turned Q4 around and although that should not work it brought the signal to the right level and also the feedback was reacting better.
That made me think  that the delay signal is too loud because either the signal from the NE570 to the V3205 is too loud (which would explain the distortion) or the signal coming from the V3205 to the NE570 back is too loud (which would not explain the distortion). I do know that the delay should not be completely clean but this distortion is too much.  Could it be that we are driving the V3205 (in my case even two) too loud in this build??

All voltages read as posted elswhere. There is only one deviation in reading: NE570 pin 10+ 11 read 3,5 volts where it should be 4,1 volts.

Thanks for the help.

Best, Marc