Topic: phantom power for DPA 4061s?

[jnorman34]

hiya - I picked up a pair of DPA 4061s that terminate in a single stereo mini-plug.  this allows them to be used directly into some portable recorders that supply 5v plugin power to the mini mic input jack.

Naiant makes what jon calls a PFA - phantom power adapter - which has a stereo mini-jack on one end, and a pair of standard XLR plugs on the other end, so you can plug the stereo mini-jack from the pair of 4061s into the naiant unit and then use a regular preamp with XLR ins which supply 48v phantom power.  i am assuming that jon knws what he is doing, but...

the question is - without something that steps the power supplied from 48v down to the 5v that the 4061s need, will i be running a risk of frying the 4061s? 

[boojum]

Jim -

From the horse's mouth:

http://www.dpamicrophones.com/en/products.aspx?c=Item&category=128&item=24039#specifications

http://www.dpamicrophones.com/en/products.aspx?c=Item&category=139&item=24263#description

http://www.dpamicrophones.com/sitecore/shell/Controls/Rich%20Text%20Editor/~/media/PDF/Download/Users%20Manuals/4060%204061.pdf

http://www.dpamicrophones.com/en/products.aspx?c=item&category=138&item=24118#description


Sheesh, I just saw the price on these puppies.  Imagine what the labor rate is in Denmark, must be EU75 an hour.   LOL  The best deal with DPA is to get the whole kit and save some money that way.  A la carte they eat you alive.

[Gutbucket]

..the question is - without something that steps the power supplied from 48v down to the 5v that the 4061s need, will i be running a risk of frying the 4061s?

The answer is yes.  Don't feed them more than 12v or so.  48v will fry 'em.

The last link above is the DPA phantom to plugin power adaptor but those are something like $100 each and you need two of them.  The Niant adapter is probably fine, but ask Jon.  The other option is to power them with a battery box and turn off the phantom supply on the preamp/recorder.

[mfrench]

The MMA6000 mic preamp for these mics, and the battery box, both put out 9volts

[Gutbucket]

As mentioned, 9 is the magic number.  Thanks for adding that.

[fmaderjr]

I think all phantom power adapters with mini-jacks are designed to step down the phantom power to the 9 volts or so that mini-mics can use. I got one from Sound Pros that works fine with my DPAs and I'm sure Jon's would as well, but of course he can give the definitive answer.

[headroom]

Here is the Origianal schematic DPA  Phantom PS
The Microdots female i bought from DPA 18$ pair

[Gutbucket]

Found this- passed along to me a while back, reportedly the words of Bruce Myers, DPA N.America on powering DPA 406x:

"The typical range of voltage we recommend is between 4.5V and 9V with
the spec set at 6V. No caution needs to be taken at these levels.
No significant change in specs occurs when varying the voltage. Voltages
below 4.5V are insufficient to power the mic.

However:
It is more about amperage than voltage.
DPA minimic's are actually designed to handle a maximum current
of 7 mA. The incorporated 6.8 kOhm resistors on a standard
P48 V systems limits the current draw to exactly 7 mA.
When calculating the correct series resistor to be utilized with
a minimic, we always consider 1 mA as the normal current draw
in order to supply the mic. satisfactorily. You'll NOT gain any
better performance from the mic. by raising the current up to the
maximum of 7 mA."

[headroom]

I thinks its 0.7 mA current and not 7 mA flowing trough the DPA 40XX mics
Here the official 48 V DPA Schematic

[Nick's Picks]

I had the p48 adapters for my 4071's.  It allowed me to run them directly into my V3. 

[Sam Edwards]

Here is the Origianal schematic DPA  Phantom PS
The Microdots female i bought from DPA 18$ pair

Is there a schematic that we're supposed to be able to see? Maybe I just have the wrong browser...
thanks!
Sam

[headroom]

Here is the Origianal schematic DPA  Phantom PS
The Microdots female i bought from DPA 18$ pair

Is there a schematic that we're supposed to be able to see? Maybe I just have the wrong browser...
thanks!
Sam

Yes here again as jpg not GIF File

[Roger Gustavsson]

This is a battery-box:




This is a passive phantom adapter sending 8.2 V to the capsule:






Roger

[headroom]

This is a battery-box, 9 V to the capsule:

9 Volt Battery Box mesured on the capsule is 3 Volt.
On the 48Volt Schematic is the noise Generator aka Zenerdiode limiting it to 8.2 Volt

[Roger Gustavsson]

Corrected now!

Roger