Change 1.5V batt to PhantomPower ?

ksor · Feb 14, 2015

I'm so tired of these 1.5V batteries in my electret condenser mics - I have a bunch of them !

Of cause I have to change the cable to 2-conductor shielded cable and the plug too, but ...

How can I change them to be powered from the PhantomPower ?

L´Andratté · Feb 14, 2015

http://sound.westhost.com/project93.htm

Hope it´s wht you´re looking for...

RuudNL · Feb 14, 2015

The problem is that most (amateur) electret microphones with a 1.5 V battery have an unbalanced output.
If the microphone has a transformer at the output (or you could add one), you would only have to add two resistors and a capacitor.
(And maybe add a zener diode, to ensure that the voltage will not get too high.)

L´Andratté · Feb 14, 2015

What kind of transformer could be used best with this?

RuudNL · Feb 15, 2015

I have used small 1:1 transformers in the past, to balance the output signal of an electret microphone.
The problem is that in general there is not very much space for a transformer.
So I had to use unshielded transformers, to save space.
By the way: don't be tempted to use so called 1:1 modem transformers, because I discovered that they have a very poor LF response.

ksor · Feb 15, 2015

L´Andratté said:
http://sound.westhost.com/project93.htm

Hope it´s wht you´re looking for...

Thx - I'll read it with interest !

It seems like not using PhantomPower ;-(( ... I want to use that.

RuudNL · Feb 15, 2015

Well in fact figure 6 IS using phantom power, but that would mean that you would have to modify the electronics inside the microphone.
Not too long ago there was a thread on this site about the same subject, I will see if I can still find it.

RuudNL · Feb 15, 2015

Found it!
http://groupdiy.com/index.php?topic=51035.msg647918#msg647918
I think it looks familiar...

ksor · Feb 16, 2015

RuudNL said:
Found it!
http://groupdiy.com/index.php?topic=51035.msg647918#msg647918
I think it looks familiar...

Thx RuddNL, I'll have to go further into that text :-[

emrr · Feb 16, 2015

This (top part) works with DPA 4060 type mics, no problems with long cable runs noted.

micaddict · Feb 16, 2015

This thread reminds me of folks doing mods on Realistic PZM mics, back in the day.

Some are still on it, trying to find better ways:

http://www.uneeda-audio.com/pzm/

Change 1.5V batt to PhantomPower ?

Help Support GroupDIY Audio Forum:

ksor

Well-known member

L´Andratté

Well-known member

RuudNL

Well-known member

L´Andratté

Well-known member

RuudNL

Well-known member

ksor

Well-known member

RuudNL

Well-known member

RuudNL

Well-known member

ksor

Well-known member

emrr

Well-known member

micaddict

Well-known member

Similar threads

Latest posts

Change 1.5V batt to PhantomPower ?

Help Support GroupDIY Audio Forum:

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Well-known member

Similar threads

Join the conversation!

Join today and get all the highlights of this community direct to your inbox. It's FREE!