BOSS DD2 or DD3 mods for tape echo sound
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
Hello friends
These are mods I have done on several customers Boss DD2 or DD3 pedals to obtain a more realistic tape echo sounding device.
naturally - only a tape echo sounds like a tape echo , but these mods will certainly get you closer to a tape echo sound (without the noisy and inconvenient tape loops).
the schematic can be found here:
http://www.freeinfosociety.com/electron ... php?id=126
Please note these mods apply to the original DD2 or DD3 which used the 64 pin DIP controller IC.
If anyone is sufficiently interested, I will post the mods for the later model SMD postage stamp controller IC model.
Okay - here we go
1: replace R14 (33k) with a 10k resistor.
2: replace R33 (47k) with a 22k resistor.
3: replace C26 (1uf 50v) with a 10n film capacitor.
4: add a 100n film capacitor in parallel with the effect level potentiometer ( between pin 1 and pin 3 of the poti)
That's it - all done - plug your guitar in and give it a whirl
bajaman
ps: check out that nice input buffer too.
This mod for the DD3a...
This mod for the DD3b...
These are mods I have done on several customers Boss DD2 or DD3 pedals to obtain a more realistic tape echo sounding device.
naturally - only a tape echo sounds like a tape echo , but these mods will certainly get you closer to a tape echo sound (without the noisy and inconvenient tape loops).
the schematic can be found here:
http://www.freeinfosociety.com/electron ... php?id=126
Please note these mods apply to the original DD2 or DD3 which used the 64 pin DIP controller IC.
If anyone is sufficiently interested, I will post the mods for the later model SMD postage stamp controller IC model.
Okay - here we go
1: replace R14 (33k) with a 10k resistor.
2: replace R33 (47k) with a 22k resistor.
3: replace C26 (1uf 50v) with a 10n film capacitor.
4: add a 100n film capacitor in parallel with the effect level potentiometer ( between pin 1 and pin 3 of the poti)
That's it - all done - plug your guitar in and give it a whirl
bajaman
ps: check out that nice input buffer too.
This mod for the DD3a...
This mod for the DD3b...
Last edited by lolbou on 04 Oct 2013, 13:24, edited 2 times in total.
Reason: Added links for SMD versions...
Reason: Added links for SMD versions...
- seniorLoco
- Resistor Ronker
now thats nice ...thanks.
i have done all kinda crazy stuff to my DD3 ....eg bleed caps to an op-amp with clippers
i have done all kinda crazy stuff to my DD3 ....eg bleed caps to an op-amp with clippers
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
give me a couple of days - have to dig up the schematic as it does not appear to be on the web as yetcould you post the modes for the SMD version please?
bajaman
- jakerandall
- Breadboard Brother
Information
- Posts: 56
- Joined: 03 Nov 2007, 09:46
It would be cool baja to brew your own. Lose that 4th knob, elevel, fback,delay time. Lose the mode knob, have it do up to a second maybe more. Implement the mods, improved buffer, readily available parts for a build. It might be a touch schematic but I would be interested in trying to build that.
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
I already have - but you will have to wait until it gets tidied up for a DIY project
bajaman
bajaman
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
Here are the mods for the DD3a model - the one with the 20mm square smd controller chipcould you post the mods for the SMD version please?
1: replace R009 (33k) with a 10k resistor.
2: replace R056 (47k) with a 22k resistor.
3: replace C051 (1uf 50v) with a 10n film capacitor.
4: add a 100n film capacitor in parallel with the effect level potentiometer ( between pin 1 and pin 3 of the poti)
That's it - all done - plug your guitar in and give it a whirl
bajaman
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
repeats get progressively less bassy and approach almost self oscillation at maximum repeat level - also the initial and successive echos have less high end - they no longer sound like they have just reflected off a hard sheet of steelWhat effect do these changes have on the sound?
cheers
bajaman
- Meanderthal
- Breadboard Brother
Information
- Posts: 77
- Joined: 03 Sep 2007, 22:24
Wow, that sounds like fun! Now I wish I had one of those ...
Is there room to stuff another pot in one? If so, maybe a simple low pass filter(pot-cap-ground) might come in handy.
Is there room to stuff another pot in one? If so, maybe a simple low pass filter(pot-cap-ground) might come in handy.
- seniorLoco
- Resistor Ronker
Thanks Baja ....i got my DD3 square chip much clearer repeats with your mod suggestions!! Used two diff value caps switchable
I kinda did way too many things before and got it all muddy and dark ..
"Curiosity may have killed the cat, but it saved the mice, who ate the cheese."
- seniorLoco
- Resistor Ronker
sosodef ...there are a few PT based projects aye ....do a search.
Another cool delay to muck around is the PB&j ... cheap and good!
Another cool delay to muck around is the PB&j ... cheap and good!
"Curiosity may have killed the cat, but it saved the mice, who ate the cheese."
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
well worth buying one - there must be plenty used units out there for sale - Ebay etc.what happens
to use guys without
a dd3?
Then do the mods and voila
bajaman
- Bernardduur
- Transistor Tuner
Would this also work on the DSD-3??
Edit
To answer my own question, yes, it would work and does sound quite nice
The numbers are different:
DD2 | DSD3
R14 | R17 (same value)
R33 | R30; value is 33k (47k in DD-2)
C26 | C25 (same value)
Edit
To answer my own question, yes, it would work and does sound quite nice
The numbers are different:
DD2 | DSD3
R14 | R17 (same value)
R33 | R30; value is 33k (47k in DD-2)
C26 | C25 (same value)
'No more....... loud music.......'
Follow my love for pedals and amps on https://bernardduur.blogspot.com and https://www.instagram.com/bernardduur1
Follow my love for pedals and amps on https://bernardduur.blogspot.com and https://www.instagram.com/bernardduur1
- The Rotagilla
- Diode Debunker
Do we call these the Cornish Mods or the Baja Mods?
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
well - i do not know exactly what Pete does - and I very much doubt that he will ever tell usDo we call these the Cornish Mods or the Baja Mods?
let us just call them the Freestompbox mods - my gift to the community
cheers
bajaman
- seniorLoco
- Resistor Ronker
Bajaman ....i will say it again ....I LOVE IT !!
"Curiosity may have killed the cat, but it saved the mice, who ate the cheese."
- bajaman
- Old Solderhand
Information
- Posts: 4549
- Joined: 26 Jun 2007, 21:18
- Location: New Brighton, Christchurch, NZ
- Has thanked: 596 times
- Been thanked: 2061 times
forget the switch - just do the mods and you will hear what they do
bajaman
bajaman