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Author Topic: DIY batterybox for dpa 4061 (iso: schematics?) edit: Now with pictures!  (Read 9182 times)

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Offline firmdragon

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hey guys,

i've decided my sound pro's battery box is too bulky and that i can do better in terms of space ( i also want to practice my soldering).  anyone got diagram for a batterybox that will power my dpas?

tia
« Last Edit: April 14, 2007, 12:22:24 AM by firmdragon »

Offline ghellquist

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #1 on: March 11, 2007, 05:19:48 PM »
If you find nothing else, the DAD6001 (converter for 48V phantom) circuit is on the DPA website. You could use this for inspiration. Beats me though what a battery box would contain.



Gunnar

Offline firmdragon

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #2 on: March 12, 2007, 03:48:41 PM »
i was looking around the net for 9v battery boxes.
there's one here:
http://forums.minidisc.org/index.php?showtopic=11254

i posted the schematics  below.  what do you guys think? will it be able to power the dpas sufficiently?






fc = 1 / (2 * Pi * R * C)
C = 1 / (2 * Pi * R * fc)

fc = cutoff / rolloff frequency in Hz
Pi = 3.1415927...
R = Input resistance in Ohm
C = capacitor value in F (Farad), 1 uF = 0.000001 F

Offline dointhatrag

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #3 on: March 12, 2007, 04:30:42 PM »
I spent the money on a coresound battery box (w/ high pass switch) for my 4061's I think for about 50 bucks.

It is very solid and noiseless. its about the size of 3 cricket lighters stacked up.

http://www.core-sound.com/bk/IMG11A.JPG

Schoeps + Neumann + DPA - Sonosax PR - Apogee Mini Me - 24/96

Offline headroom

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #4 on: March 16, 2007, 05:56:00 AM »
Hi here this is official DPA 9 Volt schematic

Offline firmdragon

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #5 on: March 16, 2007, 02:03:24 PM »
Hi here this is official DPA 9 Volt schematic

oh bless you!  i'll try this out next week.

EDIT: so i made it and it seems to work. still haven't had a chance to use it in the field yet.  i'll update when i eventually do.
« Last Edit: March 21, 2007, 04:00:51 AM by firmdragon »

Offline Chuck

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #6 on: March 27, 2007, 08:30:24 PM »
If you find nothing else, the DAD6001 (converter for 48V phantom) circuit is on the DPA website. You could use this for inspiration. Beats me though what a battery box would contain.



Gunnar

Gunnar:

Is this all that is needed to power electrets with 48v phantom power?
Essentially droping 48v DC down to 9v DC?

I've been looking for a circuit like this for a while.

Chuck
Reality is merely an illusion, albeit a very persistent one.

Microphones: (2) Microtech Gefell M300, (2) AKG C 480 B comb-ULS/ CK 61/ CK 63, (2) CAD GXL1200 (cardioid and sub-cardioid capsule & electronics mod), (2) Audix M1290-o, (2) Micro capsule active cables w/ Naiant PFA's, (2) Naiant MSH-1O, (2) Naiant AKG Active cables, (2) Church CA-11 (cardioid), (2) CAD C9, (1) Nady SCM-1000 (mod)
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Offline ghellquist

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #7 on: March 28, 2007, 04:54:31 PM »
I believe it should work with most simple mics. The zener will protect agains over-voltage and the fet in the mic will draw a certain amount of current dropping the the voltage even more. Just be very careful to install the zener the right way and do measure the open circuit voltage before connecting you mic. You might want to experiment a little with the exact resistor values depending on your mic.

Gunnar

Offline firmdragon

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #8 on: April 13, 2007, 08:38:21 PM »
so it took me a while to sucessfully test it out.  but here's some a pic of what it looks like and how it compares to a soundpro SP-SPSB-1.

edit:
I used a piece of veraboard and used a female mini-jack from an old soundcard.  the resistors and cap are all pretty common.  all held in togethor with hot glue.  in hindsight,  i should have used an old headphone male mini-jack instead of regular wire and that new gold jack.  the fact that the gold jack isn't a right angle plug also kinda sucks. also a some sort of housing for the battery probably wouldn't be a bad idea either.  one time between sets, i couldn't figure out why i wasn't getting levels, turned out the battery had become disconnected from the bb.

 questions, comments, suggestions? all welcomed. 
« Last Edit: April 13, 2007, 08:54:14 PM by firmdragon »

Offline firmdragon

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Re: DIY batterybox for dpa 4061 (iso: schematics?)
« Reply #9 on: April 13, 2007, 08:44:35 PM »
sample wav:  in front of an outdoor festival-sized PA.  seems to handle the bass/kick fine. so full setup was dpa 4061>diybb (i guess)>iriver ihp-140


Offline lordbelial

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I build myself this official DPA bbox and taped Bruce Springsteen this weekend. I was under the stack, 5 or 6 meters high and i was positioned 10 meter in the rear part.
I found out that the overall volume was considerably low (-16db peak), I was wondering if the 100 K resistor to ground could be acting as attenuator of the signal @ output.

Gear used was: DPA4061 > Home made battery box (using the official 9V bbox for DPA) > Iriver IHP-104 (4GB CF Mod)

Any comment from the board technicians?
Actual Gear:

stealth  - AT943 (c,o,sc,h) > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Ultrastealth  - DPA 4061 > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Open - BSC1-K1/K2/K3/K4 > Segue Dogstars > Marantz PMD671 busman t-mod

Playback: PC > M-Audio Fast Track Pro > KRK RP6 actives

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Offline lordbelial

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I found out that the overall volume was considerably low (-16db peak), I was wondering if the 100 K resistor to ground could be acting as attenuator of the signal @ output.

No, the extra load of that resistor is so small that it makes little difference.  You could try a larger value for the 10K resistor if you need more gain.  At some point you will degrade performance, but it's hard to say where without knowing more about the mic.  You won't break anything though, so it's worth a try.

OK. I think is not worth trying to modify the 10K resistor. Anyway, it fits my stack-taping needs.

Thanks for the suggestion anyway!
Actual Gear:

stealth  - AT943 (c,o,sc,h) > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Ultrastealth  - DPA 4061 > ST-9100 > Edirol R09HR/I-River IHP-116(CFMod)
Open - BSC1-K1/K2/K3/K4 > Segue Dogstars > Marantz PMD671 busman t-mod

Playback: PC > M-Audio Fast Track Pro > KRK RP6 actives

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Offline dabbler

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Re: DIY batterybox for dpa 4061 (iso: schematics?) edit: Now with pictures!
« Reply #12 on: February 17, 2015, 12:33:20 AM »
Thanks for that schematic, I used it built my own BB for the low-power 4063.
I decided to use one of the DPA mic boxes my 4063s arrived in since it's a great shape size for me with plenty of space to store a 12" mini-mini cable when not in use.
All the parts in the DPA schematic + lots of electronics-grade silicone sealant for stability.

I probably won't even need it since the 4063 seems alright out of the M10 PiP, but I could pack this for days when I don't mind travelling a little heavier.
Edit: I forgot to note I'm using Blu-Tack to hold the 9V in place, so it's secure yet removable.
« Last Edit: February 17, 2015, 12:55:04 AM by dabbler »

Offline dabbler

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Re: DIY batterybox for dpa 4061 (iso: schematics?) edit: Now with pictures!
« Reply #13 on: October 29, 2015, 03:19:54 AM »
I'm also using the official DPA circuit provided by headroom for DPA 4061 mics.
However, I'm wondering if it's really enough since some of my stack/stage lip recordings do exhibit a tiny amount of distortion (which could also be from the PA system itself, I couldn't tell wearing foam earplugs).
The maximum current draw of the DPA 406x series is 1.5 mA (3.5mA with DAD6001) according to Jarrod from DPA.

A 9V / 10K resistor would only give 0.9 mA; so maybe 4.7K is a better match (giving 1.91 mA)?
I've only made one comp several months ago with a 4.7K vs 10K side-by-side on otherwise identical rigs (DPA 4061 + M10) and the 4.7K recording was 1.5-2dB louder while keeping the 100K resistor.  The show wasn't very loud, so I didn't notice a quality difference at the loudest sections.

Btw, am I correct the 100K resistor is only for output attenuation and would not affect powering of the mic?

Offline Len Moskowitz (Core Sound)

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Re: DIY batterybox for dpa 4061 (iso: schematics?) edit: Now with pictures!
« Reply #14 on: October 29, 2015, 05:03:36 AM »
If you're hearing distortion, it's not from the DPAs.

Even 10k Ohm is marginal in protecting the capsule. With a fresh, so-called "9 Volt" battery (which can really measure as much as 9.6 Volts), you risk damaging the capsule.

With 4.7k you'll almost certainly eventually damage or destroy it.
« Last Edit: October 29, 2015, 05:07:06 AM by Len Moskowitz (Core Sound) »
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Offline dabbler

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Re: DIY batterybox for dpa 4061 (iso: schematics?) edit: Now with pictures!
« Reply #15 on: October 29, 2015, 05:39:31 AM »
Actually, I've been hoping to switch to the EBL 9V Li-ions which are only 8.4V.
I would get a nice weight reduction, too.

 

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