SONY ECM s 220 microphone

[Bubenheim]

New to this Forum and my first question is does anybody know, how to get the right voltage to the Sony ECM -s220 Microphone.
It was part of a Sony Dat recorder (Sony DT3) i think around 1991.
I do not have the recorder anymore, but i wondered if i can use the mic in connection with some other equipment, or just dump it.

I do field recording for fun and i have quite a good selection of Microphones, i thought why waste it, the inside looks interesting.
thank you

[William Sommerwerck]

The ECM-S220 has a separate power cable. I don't remember the voltage, but
you could start with 1.5V and work up. I don't believe the polarity matters,
but I'm not sure.

[William Sommerwerck]

>> The ECM-S220 has a separate power cable. I don't remember
>> the voltage, but you could start with 1.5V and work up. I don't
>> believe the polarity matters, but I'm not sure.

> Why would you say polarity does not matter? If you are wrong,
> Bubenheim doesn't have a mic anymore.

In that case, I have an ECM-S220 I could sell him. <grin>

Polarity often doesn't matter in such microphones. The amplifier is often a
MOSFET, which doesn't "care" which way the battery is connected, as it's
internally symmetrical.

[John Williamson]

William Sommerwerck wrote:
>>> The ECM-S220 has a separate power cable. I don't remember
>>> the voltage, but you could start with 1.5V and work up. I don't
>>> believe the polarity matters, but I'm not sure.
>
>> Why would you say polarity does not matter? If you are wrong,
>> Bubenheim doesn't have a mic anymore.
>
> In that case, I have an ECM-S220 I could sell him. <grin>
>
> Polarity often doesn't matter in such microphones. The amplifier is often a
> MOSFET, which doesn't "care" which way the battery is connected, as it's
> internally symmetrical.
>
>
Schematic here:-

http://www.suite101.com/view_image.cfm/828507

Which is on this page:-

http://www.suite101.com/content/plug-in-power-microphones-how-to-fix-problems-a113300

--
Tciao for Now!

John.

[William Sommerwerck]

Fortunately, my service manual for the recorder was easy to find.

The jack has +5V on the tip. This is supplied through a single-transistor
regulator through a 100-ohm resistor. There are also bypass caps to keep
noise off the line.

[Bubenheim]

Fortunately, my service manual for the recorder was easy to find.

The jack has +5V on the tip. This is supplied through a single-transistor
regulator through a 100-ohm resistor. There are also bypass caps to keep
noise off the line.

Thank you John and William, so with a few parts i could build a little power supply unit for my self, thank you also for the schematic i give this a try.

looks like a diy weekend project.

Bubeneim

[Scott Dorsey]

Bubenheim > wrote:
>
>New to this Forum and my first question is does anybody know, how to get
>the right voltage to the Sony ECM -s220 Microphone.
>It was part of a Sony Dat recorder (Sony DT3) i think around 1991.
>I do not have the recorder anymore, but i wondered if i can use the mic
>in connection with some other equipment, or just dump it.

It requires plug-in power. Try a 9V battery in series with a 2.2K resistor
to each signal pin, then 10 uF DC blocking caps between each of the signal
pins and the output.

It is possible to drive those with phantom power with only a little
extra electronics; three caps and four resistors per channel.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."

[William Sommerwerck]

>>New to this Forum and my first question is does anybody know, how to get
>>the right voltage to the Sony ECM -s220 Microphone.
>>It was part of a Sony Dat recorder (Sony DT3) i think around 1991.
>>I do not have the recorder anymore, but i wondered if i can use the mic
>>in connection with some other equipment, or just dump it.

> It requires plug-in power. Try a 9V battery in series with a 2.2K
resistor
> to each signal pin, then 10 uF DC blocking caps between each of the signal
> pins and the output.

> It is possible to drive those with phantom power with only a little
> extra electronics; three caps and four resistors per channel.

No one is paying attention... The ECM-S220 uses a separate power cable. It's
possible the main cable works with PNP, but I don't know.