Question about MXL mics polarization voltage aka HELP!!!

[illacov]

I was wondering if anyone knows of a website or database I can get access to for MXL mic polarization voltages??

I can get my hands on some mic capsules, but they need to see 60v polarization voltage.

Is there a way to find this out short of buying the mic and measuring it or something like that??

The mics I was looking at are the MXL V57m and the MXL V67G.

I know that these mics are compatible with Peluso Capsules like the CEK67 and the PK67 for example, but Im clueless as to how this relates to the voltage that they see when they are installed in the mic.

Please if anyone can give me a hand here I would greatly appreciate it!!

Peace
Illumination

[dale116dot7]

Most mics use 60v polarization. If they are higher, you can always lower it by adding one resistor to the circuit.

[tINY]

I doubt that they HAVE to see 60v to work...

I can't see how "most" mics use 60v when the common phantom power is only 48.



-tINY

[illacov]

I'm looking into getting some M7 capsule (clones) and I was told that the capsules can see 60v but anything beyond that will make them not function.

So maybe what I was supposed to glean from that concept is that the capsule can see up to 60v, but nothing beyond that.

Both of the mics I want to use are FET mics and dont have tubes or anything like that so they shouldn't require that much juice.

For example I know someone on a forum said that the Apex 460 capsules gets about 55v (when used in its stock form in an Apex 460).

I know this may be totally off track, but I can't imagine the MXL V57M or the V67G sending anything unusual to their capsule voltage wise.

Is there a way to find this out or to measure it at all?

Perhaps somebody on this board would know since they modded these mics or looked at them before?

Thanks
Illumination

[dale116dot7]

That voltage is difficult to measure because the meter you use to measure it usually will drain the voltage down.

Many mics use a DC to DC converter to step up the phantom voltage to around 60V. A very few tube mics use a higher voltage. I believe the Gyraf G7 uses 80V but that's unusual. Most mics use 55 to 63 volts. Some mics use 47 volts (the old U87's, some of the Apex solid-state models). Studio Projects uses the DC-DC converter. Most tube mics use 60V.

The problem with a higher voltage is that a capsule with a loose diaphragm (which is normally how you set it up) will have a problem with the diaphragm getting stuck to the backplate. You have to turn the mic off to let it recover.

-Dale

[tINY]

You learn something new every day...

That's interesting that they do it that way - I guess it's easier than a higher gain output buffer with low noise.



-tINY