ADA Depot - A Forum To Support Users of ADA Amplification Gear

Non ADA Gear => Rack Gear => Topic started by: gb on August 11, 2014, 10:30:40 PM

Title: power supplies!!!!
Post by: gb on August 11, 2014, 10:30:40 PM
Ok so I acquired a dunlop rack wah dirt cheap. Has a generic power supply, chunky and heavy and has the end chopped to suit the rack wah. But all works. I want to use a light modern power pack.

It read it requires 19v min but currently uses 20v DC power supply. Im yet to check what amps it is.

Now my understanding is that I could use a 4amp power supply and the unit will draw only what it needs is this correct..  even though the unit is 2amp as an example. I guess I dont want to blow my unit up from too much power. I have a dell laptop power supply thats 19.5v and 4amps. Its light and slimline..

Any issues with using this?
Title: Re: power supplies!!!!
Post by: MarshallJMP on August 12, 2014, 02:15:17 AM
The dunlop rack wah uses a 24V AC 200mA power supply,a DC won't work!!!!

http://www.jimdunlop.com/product/dcr2sr-cry-baby-rack-module

Title: Re: power supplies!!!!
Post by: gb on August 12, 2014, 02:39:37 AM
The dunlop rack wah uses a 24V AC 200mA power supply,a DC won't work!!!!

http://www.jimdunlop.com/product/dcr2sr-cry-baby-rack-module
[/quote

You are right.. its AC not DC!! i just checked and the powersupply its using is 16VAC 1.5amp .. i have the DSR1 rack and i read it uses 16V or 20V i think i dont know how it can use a range 16-20V .. i think the dunlop powersupply is 20V but the one that came with mine is 16V .. it still works though. I noticed the 4 or 5 pin connector only uses 2 pins from the powersupply..

Ive tried contacting dunlop but they dont reply to my emails and nowhere seems to sell the power supply. I believe its part ECB730 for the dsr1.

I might just have to find another power supply that meets the specs. The one i have is an old big heavy brick thing thats from a telecommunications device.

cheers for clarifying!
Title: Re: power supplies!!!!
Post by: MarshallJMP on August 12, 2014, 07:36:01 AM
Well i have the DCR-2 and it uses a standard plug like a boss pedal.Do you have a pic of the connector?
Title: Re: power supplies!!!!
Post by: gb on August 12, 2014, 03:32:18 PM
Here are some quick pics. Its a 4pin connector although the power supply only has 2 wires and this seems to power the unit. Not sure what the other 2 would do in a factory power supply. Seems strange.
Title: Re: power supplies!!!!
Post by: gb on August 12, 2014, 11:58:38 PM
Hijack of my own thread but where so u have your dcr2 in the chain at the moment. Are you using an ada mp1?

I have my guitar into the dcr1 input. The dcr1 output wet/dry goes to input of the ada mp1 rear panel.  Then I have my intellifex in the effects loop. The ada mp1 outs to stereo power amp. Only downfall here is I loose the stereo effect. Ive run it this way as the ada sounds more true than running it daisy chained. Maybe its just my ears. Stull sounds good :). I assumed wah should come before and not after the ada mp1.


Yes yes all problems can be solved by using the mp2 which I love however not sold on it just yet.. the mp1 stock really has the sound I want and i cant replicate it in the mp2.. the mp2 has intermittent issues as you know on start up so I dont trust it.
Title: Re: power supplies!!!!
Post by: rnolan on August 13, 2014, 06:03:42 AM
Hey GB, the Mp1 is a thing unto itself, great preamp and I do miss mine although I love the MP2.
I have my guitar into the dcr1 input. The dcr1 output wet/dry goes to input of the ada mp1 rear panel.  Then I have my intellifex in the effects loop. The ada mp1 outs to stereo power amp. Only downfall here is I loose the stereo effect. Ive run it this way as the ada sounds more true than running it daisy chained. Maybe its just my ears. Stull sounds good :) . I assumed wah should come before and not after the ada mp1.
As you say the biggest downfall is losing stereo.  And they way you've patched is IMHO eminently sensible. But unfortunately, going in and out of digital gadgets means A/D D/A conversion and digital trickery on the digital bit. Not that this is bad, I love digital reverb, but I want to preserve my analogue signal as much as I can. Yes wah would normally come before the MP1, but you could put one in the loop.
Not to turn your patch upside down but running it like I do with a mixer (see http://adadepot.com/index.php?topic=117.0), similar to how you'd run a PA would preserve stereo and analogue and please your ears :thumb-up:
Title: Re: power supplies!!!!
Post by: MarshallJMP on August 13, 2014, 03:21:47 PM
Those look like 5 pin din connectors,like midi connectors right?

I use a MP-1 3TM ultra+ for distortion and an MP-2 for cleans and mild overdrive switched by a rocktron patchmate.I have mine before the ADA's.All my effects are after the MP-1 or MP-2,just to keep the stereo effect.Never liked the loop of the mp-1.

Nolan,i think the dry signal in the intellifex stays analog,it isn't digitized  :o
Title: Re: power supplies!!!!
Post by: rnolan on August 14, 2014, 06:24:17 AM
(Nolan,i think the dry signal in the intellifex stays analog,it isn't digitized  (http://adadepot.com/Smileys/default/shocked.gif)) Cool, then it's great candidate for making life easy and chain through it after the MP1 and keep stereo :thumb-up: .  So best back end of your patch MP1 A/B out > IFx L/R in IFx L/R out > power amp L/R in, mix the amount of effect with mix (wet/dry) in IFx, change its program (different effects/mix settings or bypass) via midi (use MP1 midi through or midi out into IFx midi in).
I couldn't find a dcr1 on google, is it like MJMPs dcr2 (i.e. a rack wah)?  I take it it does line level out if your coming in the MP1 rear input (as it's a line level input).
Depending whether you want to distort the wah (before MP1) or wah the distorted MP1 signal (MP1 loop) are the two options.
If you want to put it before the MP1, I'd go with inst level settings and go into the MP1 front input (or do the mod with makes the rear input the same as front for guit/inst level as may be easier with you rack/patch?), otherwise you increase the gain via the dcr1 (guitar millivolts to line level ~volts) and then the MP1 will drop them back again to millivolts for the tube/SS circuits (MJMP correct me if I'm wrong), which is not good gain structure (unless you are running really long guitar cables ?).
If it runs comfortably at line level (in/out), then the loop may be a better place for it (you can switch it in an out on different patches) and plug your guitar in the front input.  But try both (all 3 i.e. rear input as well) and see how it sounds, the big bonus will be stereo Fx with the IFx after the MP1.
Title: Re: power supplies!!!!
Post by: MarshallJMP on August 14, 2014, 02:53:00 PM
The rack wah just puts out instrument level so the level will be to low for a line in altough i have a boost knob so maybe it could work.Putting it behind the mp-1 won't sound good IMO,it will sound quite nasal.
Title: Re: power supplies!!!!
Post by: gb on August 14, 2014, 07:59:43 PM
The rack wah just puts out instrument level so the level will be to low for a line in altough i have a boost knob so maybe it could work.Putting it behind the mp-1 won't sound good IMO,it will sound quite nasal.

What do you mean behind the mp1? Are the front and rear inputs on the mp1 different? Should I run the output of the rack wah to the front of the mp1 instead?
Title: Re: power supplies!!!!
Post by: MarshallJMP on August 15, 2014, 03:09:52 AM
Well i mean connecting the wah after the mp-1,but that won't sound good at all.

The V1.xx have an instrument level front input and a balanced line in on the back,the V2.xx have both instrument level inputs.
You can modify the V1 to V2 specs with the rear jack mod.

So it all depends what version you have.
Title: Re: power supplies!!!!
Post by: gb on August 15, 2014, 03:24:45 AM
Well i mean connecting the wah after the mp-1,but that won't sound good at all.

The V1.xx have an instrument level front input and a balanced line in on the back,the V2.xx have both instrument level inputs.
You can modify the V1 to V2 specs with the rear jack mod.

So it all depends what version you have.



Ahh yes I see what you mean. I have 2.01. And I did notice what you mean I now plug guitar into rear input of wah then output to mp1 input on rear.

Im not sure I understand what the wet/dry output and wet/buff outputs mean on the wah. I know what dry is. How so I use all these outputs if the mp1 has 1 input.

Sorry for the noob questions just trying to understand my gear and how best utilize it.
Title: Re: power supplies!!!!
Post by: MarshallJMP on August 15, 2014, 03:27:54 AM
Can you take some pics of the front and back of the wah,this way i can see the differences with mine.
Title: Re: power supplies!!!!
Post by: gb on August 15, 2014, 05:15:38 AM
Can you take some pics of the front and back of the wah,this way i can see the differences with mine.

(http://i63.photobucket.com/albums/h160/gbx78/Mobile%20Uploads/20140815_220247_zps7mvqnafg.jpg)

(http://i63.photobucket.com/albums/h160/gbx78/Mobile%20Uploads/20140815_220259_zpsaynsuamq.jpg)

(http://i63.photobucket.com/albums/h160/gbx78/Snapchat-20140815095154_zpsdko4c9hf.jpg)
Title: Re: power supplies!!!!
Post by: gb on August 15, 2014, 05:18:46 AM
You can see before the pics I changed back to guitar -wah-mp1-mp1 ououts to intellifex to power amp.. wow ut sounds heaps better than in the loop.. like ALOT better.

Just unsure about the outputs of the wah.

I used to have mp1 to wah input then wah dry to one channel of power amp and wet/dry to other channel. Sounded funky.. retained the dry signal and wah on the other. .
Title: Re: power supplies!!!!
Post by: rnolan on August 15, 2014, 06:27:29 AM
The Dry is a pass through so the signal can go to the input of something you don't want wah mixed with.
Don't know about the Wet/Buff, do you have the manual ?
Title: Re: power supplies!!!!
Post by: MarshallJMP on August 15, 2014, 08:37:54 AM
I have input,dry and output but don't know either what the wet/buff is.
Title: Re: power supplies!!!!
Post by: gb on August 15, 2014, 08:05:41 PM
thanks guys.. yeah i found the manual online but it doesnt really give examples of how you would use these outputs or what they mean exactly. thats ok ill just keep using it how i use it. sounds good . was just curious how else and if i was doing it wrong.

here is what it says:

Insert the input signal plug from your instrument or effects
chain into the input jack labeled IN on the back panel of the
DCR-1SR.There are three output jacks on the rear panel.The
two output jacks labeled WET/BUFF and WET/DRY will send
an output signal that contains the wah effect.The WET/BUFF
connector has a buffer driver in the bypass signal when the
effect is off.The WET/DRY connector is hard wire bypassed
when the effect is in the bypass mode.The DRY output jack is
hard wire bypassed to the input jack and will bypass the wah
effect at all times. Connect the amp’s output signal plug to the
selected ouput jack, the corresponding LEDs on the f

Title: Re: power supplies!!!!
Post by: rnolan on August 16, 2014, 05:57:06 AM
Hey GB, would have been nice if they explained what they intended with wet/buff.  So buffers are generally used to buffer voltage or current between one device and another (so a part of a audio circuit or 2 separate audio devices (in this case it's 2 audio devices)). (Kind of lets 2 things (that may normally not connect optimally (e.g. voltage/impedance/current miss match)) connect, i.e. buffers between them). e.g. high impedance to low impedance (http://en.wikipedia.org/wiki/Buffer_amplifier).
So I'd proffer the wet/buff is to plug into things like FX returns, mixer inputs etc; where as the wet/dry is designed for guitar input, guit amp, MP1 input etc.  The manual doesn't give much detail but that's my take so far.
Cheers R
Title: Re: power supplies!!!!
Post by: gb on August 16, 2014, 06:57:08 AM
Hey GB, would have been nice if they explained what they intended with wet/buff.  So buffers are generally used to buffer voltage or current between one device and another (so a part of a audio circuit or 2 separate audio devices (in this case it's 2 audio devices)). (Kind of lets 2 things (that may normally not connect optimally (e.g. voltage/impedance/current miss match)) connect, i.e. buffers between them). e.g. high impedance to low impedance (http://en.wikipedia.org/wiki/Buffer_amplifier).
So I'd proffer the wet/buff is to plug into things like FX returns, mixer inputs etc; where as the wet/dry is designed for guitar input, guit amp, MP1 input etc.  The manual doesn't give much detail but that's my take so far.
Cheers R

Thanks mate.. thats what ive been using the wet/dry and sounds good
Title: Re: power supplies!!!!
Post by: rnolan on August 16, 2014, 07:07:46 AM
No worries, MJMP and others may have some more ideas on why it would be there/good to have ? (they wouldn't waste a jack socket for no reason).
Title: Re: power supplies!!!!
Post by: MarshallJMP on August 16, 2014, 01:57:53 PM
Hey gb

I just found my original dunlop adapter,it's a 110V to 24Vac 200mA.If you want you can have it.Don't know if you need a 110 or 220V?
Title: Re: power supplies!!!!
Post by: gb on August 16, 2014, 03:53:21 PM
Hey gb

I just found my original dunlop adapter,it's a 110V to 24Vac 200mA.If you want you can have it.Don't know if you need a 110 or 220V?


Awwww geeez thanks mate. Unfortunately I need 220v :(.

I found on ebay  24vac 1amp power supplies but i guess they are rhe same as what I hav now anyway. It would have been nice to have the proper power supply.

I still wonder if only 2 pins provide power what the others are for. I could open it up but not really worried at this stage thanks again