Boss - DM-2 Delay [schematic]
- analogguru
- Old Solderhand
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People like guts? ok, here are some others from our japanese hackerfriends (click on the pictures for high resolution):
Boss DM-2 guts
enjoy,
analogguru
Boss DM-2 guts
enjoy,
analogguru
Last edited by analogguru on 29 Jun 2007, 21:39, edited 1 time in total.
There´s a sucker born every minute - and too many of them end up in the bootweak pedal biz.
- bajaman
- Old Solderhand
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Hi AG
I have heaps of ROLAND /BOSS schems from this era - let me know if you want any in particular
Steve
I have heaps of ROLAND /BOSS schems from this era - let me know if you want any in particular
Steve
- andre
- Breadboard Brother
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- Posts: 51
- Joined: 21 Jan 2008, 15:20
- my favorite amplifier: Hughes & Kettner Statesman Quad
- Completed builds: Dist + overdr.: Distortion+, BSIABII, Shaka III, Bluesbreaker, Box of Rock, Highway 89, DS-1, Proce Rat, Omnidrive, TS808, Bluemagic, Fulldrive 2, big muff
Delay: DM-2, Rebote 2.5, PT-80
Modulation: Ross Phaser, Small Clone, CE-2, Zombie chorus, FL-301, Easyvibe, Ultraflanger
Compr.: Dod280, Dynacomp
the rest: SG-1, Sparkleboost, BAJA CX-3 leslie simulator - Location: Netherlands
- Been thanked: 6 times
There's a good picture of the copperside here:
http://www.bossarea.com/
At this moment however, the website appears to be down.
If you're planning to clone the PCB, you can save yourself the trouble because
I recently succesfully cloned the DM-2.
Since my PCB is an almost exact copy of the original, I don't want to post it,
but I can mail it to you if you want to.
André
http://www.bossarea.com/
At this moment however, the website appears to be down.
If you're planning to clone the PCB, you can save yourself the trouble because
I recently succesfully cloned the DM-2.
Since my PCB is an almost exact copy of the original, I don't want to post it,
but I can mail it to you if you want to.
André
I have a board design already, but I want to see yours... Please send it to my e-mail: xxxxxxxxxxxxxxxxxxxxx
I have one doubt about MN 3005 operation. Its datasheet states the power supply voltage is something about -15 or -14 Volts (it is designed to be used with positive ground), but the DM-2 is designed to be operated using 9 V batteries. As in the service manual there is the word "selected" when it mention the MN 3005, I would like to know if can any MN3005 to be operated with only 9 volts? Does exist an special version of the MN 3005? (not the MN-3205 which is negative ground)
Did you use the DM-2 MN3005 circuit? or does yours use the MN3205 chip?
Is there any other opinions?
I have one doubt about MN 3005 operation. Its datasheet states the power supply voltage is something about -15 or -14 Volts (it is designed to be used with positive ground), but the DM-2 is designed to be operated using 9 V batteries. As in the service manual there is the word "selected" when it mention the MN 3005, I would like to know if can any MN3005 to be operated with only 9 volts? Does exist an special version of the MN 3005? (not the MN-3205 which is negative ground)
Did you use the DM-2 MN3005 circuit? or does yours use the MN3205 chip?
Is there any other opinions?
- andre
- Breadboard Brother
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- Posts: 51
- Joined: 21 Jan 2008, 15:20
- my favorite amplifier: Hughes & Kettner Statesman Quad
- Completed builds: Dist + overdr.: Distortion+, BSIABII, Shaka III, Bluesbreaker, Box of Rock, Highway 89, DS-1, Proce Rat, Omnidrive, TS808, Bluemagic, Fulldrive 2, big muff
Delay: DM-2, Rebote 2.5, PT-80
Modulation: Ross Phaser, Small Clone, CE-2, Zombie chorus, FL-301, Easyvibe, Ultraflanger
Compr.: Dod280, Dynacomp
the rest: SG-1, Sparkleboost, BAJA CX-3 leslie simulator - Location: Netherlands
- Been thanked: 6 times
Haroldo,
I will sent my PCB design later today.
It's on another computer than the one I'm writing this reply on.
I can show you a picture of the parts side though:
I did use an MN3005. This design would not work without it.
What they did is just reversing the MN3005 and MN3101's power connections and some other changes.
The MN3005's were "Selected" on minimal distortion at 9V.
I only tried 1 MN3005, and it sounds good to me, although I have a couple of them lying around.
André
I will sent my PCB design later today.
It's on another computer than the one I'm writing this reply on.
I can show you a picture of the parts side though:
I did use an MN3005. This design would not work without it.
What they did is just reversing the MN3005 and MN3101's power connections and some other changes.
The MN3005's were "Selected" on minimal distortion at 9V.
I only tried 1 MN3005, and it sounds good to me, although I have a couple of them lying around.
André
Hello André
I'm planning to clone the DM-2.I found PCB on japanese website
http://wlst.jp/effector/dm-2/DM-2.pdf
website says some people reported that DM2 does not do a self-oscillation.
I'd love to build your version to save myself the trouble.
when you have a moment could you possibly send PCB to my e-mail:xxxxxxxxxxxx
sorry for my broken english.
kidblue
I'm planning to clone the DM-2.I found PCB on japanese website
http://wlst.jp/effector/dm-2/DM-2.pdf
website says some people reported that DM2 does not do a self-oscillation.
I'd love to build your version to save myself the trouble.
when you have a moment could you possibly send PCB to my e-mail:xxxxxxxxxxxx
sorry for my broken english.
kidblue
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- Posts: 3
- Joined: 01 Apr 2010, 03:32
- my favorite amplifier: crate gx15
- Location: San Francisco
- Contact:
http://revivalelectric.tumblr.com/post/ ... -schematic
Hi All,
I have a copy of the service manual, hope it helps!
Feel free to email me for a copy, travis@xxxxxxxxxxx
Hi All,
I have a copy of the service manual, hope it helps!
Feel free to email me for a copy, travis@xxxxxxxxxxx
- Dirk_Hendrik
- Old Solderhand
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Hold it,
With all blind horny requests for that layout by (mostly) first time posters,
Does thhat mean that in the near future there will be a whole new generation of DM builders which is finding out the MN3005 is a) impossible to obtain and b) all those chips seen in ebay adds happen to be fake?
With all blind horny requests for that layout by (mostly) first time posters,
Does thhat mean that in the near future there will be a whole new generation of DM builders which is finding out the MN3005 is a) impossible to obtain and b) all those chips seen in ebay adds happen to be fake?
- modman
- a d m i n
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I was almost going to say that DH spoiled all the fun, but dem deaf it seems...
To everybody in this thread:
Don't post your email on the forum![/color]
To everybody in this thread:
Don't post your email on the forum![/color]
- this attracts spam
- this is unnecessary there is a button for that
- there is an attachment function
- please have a look here Bajaman Wet Cat = Aqua Puss = Boss DM-2 project
- and also at the Aqua Puss board order thread
Please, support freestompboxes.org on Patreon for just 1 pcb per year! Or donate directly through PayPal
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- Posts: 8
- Joined: 17 Apr 2011, 18:35
Hello!
I just built my DM-2 (actually, I am still waiting for the MN3005 and NE570 to arrive), and I am getting a slightly lower volume with the effect engaged (more like a small bass boost and treble/bright cut)
From the schematic, I don´t think the lack of IC´s in the delayed bit is responsible for it, since I am just cutting the connection between the direct signal and the effect per se input. I´ll probably have to mess with the capacitors around the opamp, but I am not sure which one.
I tried to lower the resistor (47k) just before the op amp´s second input, and I could even the bypassed and engaged volumes, but it is not quite right - it gets too mellow on the effect side.
Anyone have a clue on which cap should I mess with? I guess the input cap can remove some bass content, but it won´t help bringing back the bright freq´s.
Thanks very much!
André
I just built my DM-2 (actually, I am still waiting for the MN3005 and NE570 to arrive), and I am getting a slightly lower volume with the effect engaged (more like a small bass boost and treble/bright cut)
From the schematic, I don´t think the lack of IC´s in the delayed bit is responsible for it, since I am just cutting the connection between the direct signal and the effect per se input. I´ll probably have to mess with the capacitors around the opamp, but I am not sure which one.
I tried to lower the resistor (47k) just before the op amp´s second input, and I could even the bypassed and engaged volumes, but it is not quite right - it gets too mellow on the effect side.
Anyone have a clue on which cap should I mess with? I guess the input cap can remove some bass content, but it won´t help bringing back the bright freq´s.
Thanks very much!
André
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- Posts: 1
- Joined: 18 May 2012, 21:18
I have a Boss DM-2 (MN3005 chip) that is in need of calibration. I have a copy of the calibration instructions as well as supplementary instructions from Boss expert Laurie Streitberg. All I need is someone with the willingness, the gear (sine wave generator and scope), and the savvy. I'd also like to avoid spending outrageous bench fees if at all possible
Anyone want to take a crack at it or know someone who might? Drop me a line!
Thanks!
Anyone want to take a crack at it or know someone who might? Drop me a line!
Thanks!
- Zokk
- Resistor Ronker
Hi
why don't you go with software stuff like that:
http://www.sillanumsoft.org/
there are also many simple softs which can produce basic waveforms which can do their job quite well.
Cheers
Z.
why don't you go with software stuff like that:
http://www.sillanumsoft.org/
there are also many simple softs which can produce basic waveforms which can do their job quite well.
Cheers
Z.