DOD - 460 Mini-Chorus

Nyquist5 · Post by **Nyquist5** » 08 Dec 2008, 19:07

Here they are:
http://nicosonic.free.fr/pedale/DOD460%20-1.jpg
http://nicosonic.free.fr/pedale/DOD460%20-2.jpg
http://nicosonic.free.fr/pedale/DOD460%20-3.jpg
http://nicosonic.free.fr/pedale/DOD460%20-4.jpg

Analogguru, let me know which values you need if you can't see them here, and while I have the pedal on the bench

analogguru · Post by **analogguru** » 08 Dec 2008, 21:46

Thanks for the pictures, but still soome cap values missing. Since my time is short at the moment I will come back later to it.

analogguru

Nyquist5 · Post by **Nyquist5** » 09 Dec 2008, 07:52

No worries!

Entrant_21 · Post by **Entrant_21** » 10 Dec 2008, 19:14

I love the yellow caps! I have a dod FX50 (original one) and its all yellow!

both the shell and the circuit!

Dirk_Hendrik · Post by **Dirk_Hendrik** » 22 Sep 2009, 10:43

Bump for AG,

Just resurrected one (dead SAD512D). Let me know which values you still need. I tried to download the schem from your website but it seems gone.

Dirk_Hendrik · Post by **Dirk_Hendrik** » 22 Sep 2009, 11:02

lolbou · Post by **lolbou** » 22 Sep 2009, 13:18

Dirk_Hendrik wrote:I tried to download the schem from your website but it seems gone.

Indeed! Do you have the pots values? Thanks for the cap values though...

Dirk_Hendrik · Post by **Dirk_Hendrik** » 22 Sep 2009, 13:49

Makes sense huh

Speed: 500k reverse log
Depth 100k linear

lolbou · Post by **lolbou** » 22 Sep 2009, 14:19

Lovely!

Post by **azrael** » 03 May 2010, 00:53

Does anyone have the schematic for this? I was thinking of picking one up, but I want it at unity gain.

jefcon1 · Post by **jefcon1** » 05 Oct 2010, 20:04

I have one of these pedals and I would like to raise the circuit volume to unity gain (as was a previous poster). I'm skilled at soldering (4 years doing smt repair) and have a very basic understanding of components. I think I could swap the necessary components if I knew what they were. If this is not the right place to ask please forgive me for reanimating this thread. I used search first but could not find exactly what I was looking for.

Post by **azrael** » 06 Oct 2010, 16:04

^I was just planning to add a buffer on the output of the circuit and have it boost the volume a bit.

65greg · Post by **65greg** » 04 Feb 2011, 01:58

Hi,

My first post here...
I stumbled across this thread while trying to find a schematic for my DOD 460 mini chorus. I bought mine on eBay and it had a bad op-amp at the input - I replaced it and now it works pretty good but has the volume drop I see many people complain about.
Anyway, after looking at the pictures posted in the thread it appears my 460 is a little different than the ones shown. The layout is a little different and it has a resistor and one of the 10uF caps soldered to the other side of the board. It looks to me like a factory thing because of the same brand yellow cap with long leads.

I ordered a schematic from www.ronsound.com which hasn't come yet.

Hmm - as I write this I just noticed what looks like a possibly smoked resistor (upper left in the pic)

If anyone wants pictures of mine let me know ( i have nowhere to post them right now).

Post by **azrael** » 06 Mar 2011, 00:42

Sure, you can upload the pics using FSB's upload feature.

Let us know what you can make of the schematic!

mojah63 · Post by **mojah63** » 20 Feb 2012, 19:15

The 2nd half of the output tl022 could be used to raise the gain.. That's what I'm going to to do with mine. Raise the 47k resistor to 56K that should raise the gain 19%. Or use a trimmer to dial in what you need. Not sure if you'll have to bump up the 10K to keep the same frequency response. I'm reboxing mine to add a mix control and boss style power adapter.

Yeah I know it's an old thread but people do search..

electricalNoize · Post by **electricalNoize** » 03 May 2015, 09:14

Hello
I'm currently trying to repair a DOD 460 Mini Chorus and in my research I noticed that the SAD512d requires 10 volts minimum to operate properly and a max of 15 volts. But the printed information on the pedal suggest it only requires 9v. Does anyone know how this is possible?
I hooked up the pedal to an O-scope and the chip responded well, you see the phasing I turn up the depth on this video.

mictester · Post by **mictester** » 03 May 2015, 10:02

It was quite common for designers to misuse components in guitar effects circuits. The specification I have for the Reticon 512 says that it requires a "nominal" supply of 12V. It'll work down to (about) 7V, but it gets progressively noisier as the supply voltage reduces. The available clock rate also reduces. It's actually a poor circuit design, and looks like it's a wannabe CE2. The clock circuit is rather crude, and will give strange pulses into the clock input of the BBD, and the clock modulation will be an asymmetrical triangular wave.

electricalNoize · Post by **electricalNoize** » 03 May 2015, 10:47

Thank you.

I am currently building an DC power supply for it. I just need to make sure its ok to build it for 12v.

electricalNoize · Post by **electricalNoize** » 05 May 2015, 09:14

Could the drop in volume be attributed to the voltage?
The SAD512d datasheet says that it requires 15v to operate?
I'm currently trying to bring one of these back to life. I'm building a power supply for it and fixed a capacitor that was on backwards.
I still have not been able to get it to work.

Scruffie · Post by **Scruffie** » 05 May 2015, 10:01

No, to increase the output level, decrease the values of the 2 x 47ks going in to the output opamp inverting pin in equal increments.

DOD - 460 Mini-Chorus [schematic]