DDA " S" Channel Host? ( Schematics posted at bottom of thread..!)

Snatchman · Nov 6, 2008

Hello. Just wondering since I haven't got into being able to post pics, schematics, etc. on the Forum..

... wondering if anyone would be willing to post my " S " channel schematics so you guys could give advice on best modding for components, etc., if I sent a copy of the channel schematics to you " snail mail"? It's modular channels, Master, etc. and maybe one/all of you could advice to best and practical upgrade. Thanks....

Snatchman · Nov 7, 2008

No takers huh?... :green:

helterbelter · Nov 7, 2008

I've got an M series console. It's the same as S series. I have exchanged the TLO72's in the input with Burr Brown OPA2604.
Don't expect an immense difference, but it's a noticable change. The sound is a bit tighter in the lows, and more open in the highs. This mod is recommendable.

I've also changed the NE5534's in the o/p stage to Analog Devices AD somewhat (can't recall, have to open it!). This difference isn't really noticable, and it's not a justified investment if you ask me.

The only other thing I can mention as "wise", is a recap of course !

greetings,
Paul

Snatchman · Nov 7, 2008

[quote author="helterbelter"]I've got an M series console. It's the same as S series. I have exchanged the TLO72's in the input with Burr Brown OPA2604.
Don't expect an immense difference, but it's a noticable change. The sound is a bit tighter in the lows, and more open in the highs. This mod is recommendable.

I've also changed the NE5534's in the o/p stage to Analog Devices AD somewhat (can't recall, have to open it!). This difference isn't really noticable, and it's not a justified investment if you ask me.

The only other thing I can mention as "wise", is a recap of course !

greetings,
Paul[/quote]

Hello Paul. Thanks for the reply. I sent you a PM..!.........Thanks.. :thumb:

RedNoise · Nov 8, 2008

good tips helterbelter!!!
thx !!
I'll try it .

helterbelter · Nov 9, 2008

Rednoise : have fun ! which series do you have ?

Snatchman,

If you have the manual in full, here's a question you might be able to answer :

a few channels are a different version : They have screenlegends, and place for a mic inputtransformer. I noticed the Neutrik NTM4 fits in, but I can't get it to work. Maybe there's another transformer what it's designed for. Also, there's also place for 2 caps to be placed with the transformer, but I don't know which values. My manual doesn't say anything about the inputtransformer, except that it's offered as an option....

Does your S series have micinputtrannies ?!?

Scodiddly · Nov 9, 2008

Just to make all this easier:
http://www.ddaconsoles.com/

Some kind soul at Midas put everything they had on DDA online here - schematics included.

helterbelter · Nov 9, 2008

hahaha. That's cool.

I haven't checked that site the last year. Before they just noted that the site was under construction. For more than a year..... All they had online was a manual of the cs8....

RedNoise · Nov 9, 2008

Scodiddly : Thx for the link!

helterbelter : what brand of cap did you use in your DDA??

Cheers.

helterbelter · Nov 9, 2008

Wel, I haven't recapped mine yet, hahaha.

it's actually a coincidence, but I have ordered a load of caps a couple of weeks ago, but they haven't arrived yet. I wasn't going for a mod this time, only refreshing the caps. Mainly because most channels still have the original caps fitted.

Brands ?!? Well, just what I could easily find. Of course there will be certain points where it would be better to use high grade / low esr caps, bipolar, or maybe tantalums, but I haven't looked very close to the schematics yet. Maybe I'll do that later on. I must also add that I'm more an an electronics starter, than a pro, hahaha.

But I'll look into that !

Snatchman · Nov 10, 2008

[quote author="helterbelter"]Rednoise : have fun ! which series do you have ?

Snatchman,

If you have the manual in full, here's a question you might be able to answer :

a few channels are a different version : They have screenlegends, and place for a mic inputtransformer. I noticed the Neutrik NTM4 fits in, but I can't get it to work. Maybe there's another transformer what it's designed for. Also, there's also place for 2 caps to be placed with the transformer, but I don't know which values. My manual doesn't say anything about the inputtransformer, except that it's offered as an option....

Does your S series have micinputtrannies ?!?[/quote] Hello helterbelter. No, my " S" doen't have trannies.. Since this board is set up more of a live board ( no tape returns/B input routing), I use outboard pres and come into the line in. I would rather, if I can, get a great sounding line level signal path going! What would you recommend for a direct replacement for the TLO-72 line input amp? BTW.. are those TLO-74s the amps for the EQ?... Thanks.....

RedNoise · Nov 10, 2008

The serie I have is a cs8....IIRC...!!!!too much craky noise problems push me to "leave" "her" at the moment , I'm a noob too....I'll try to recap etc ...But it's gone to be a huge work!!!

helterbelter · Nov 10, 2008

Hi, yep, the TLO74's are for the eq.

The TLO72 in the inputstage is half for line input, and half for and micinput. For lineinput use, you'll also benefit from the BB upgrade.

So, snatchman, you use it for mixing only. In that case you might have a benefit from the AD825 opamp, replacing the NE5534 in the outputstage of each channel. The thing just is, I can't make a comparison that easy. I haven't modded all channels, and I'm not able to connect the mixer at this moment (since I haven't got the programbuss fitted at this moment).

Rednoise :

Once you have the caps, recapping is quite simple, and not a lot of work. rechipping is harder when there aren't any IC-beds fitted on the boards !

RedNoise · Nov 10, 2008

this CS8 is my ex-girlfriend...I'll get her back!!!
Brand new panasonic audio caps and AOP beds...My 2009 goal.
:green:

emrr · Dec 14, 2008

Here are the specific schematics sent by Snatchman. I may end up reworking this thing for him a few channels at a time. Comment away.

channel
master
PSU

RedNoise · Dec 14, 2008

Thanks for posting emrr ;D
T.

Snatchman · Dec 15, 2008

emrr said:
Here are the specific schematics sent by Snatchman. I may end up reworking this thing for him a few channels at a time. Comment away.

channel
master
PSU

Hey Doug. Thanks alot for posting..!.. 8)

Snatchman · Dec 15, 2008

Post away.... ;D...Thanks yawl...

Snatchman · Dec 16, 2008

emrr said:
Here are the specific schematics sent by Snatchman. I may end up reworking this thing for him a few channels at a time. Comment away.

channel
master
PSU

Hi everyone. Here's the schems for my DDA S ( channel , PSU , Master..) that emrr was kind enough to post. Looking for some input on modding , rechipping , caps, etc. from anyone that can/will participate!... 8)..Thanks...

Snatchman · Dec 19, 2008

anyone..?

DDA " S" Channel Host? ( Schematics posted at bottom of thread..!)

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