Stripping Phantom Power

[Biffa]

Does anyone have a simple circuit to strip phantom power from an input. I have a mic level input on a camcorder that has non-switchable phantom power. Presumably some sort of DC blocking Caps arrangement would be required?

Many thanks


Biffa

 

[moamps]

What type microphone and input connector is used?
(stereo input thru 3.5 jack or mono-balanced thru XLRF)

 

[loonatron]

If it was a normal XLR type mic connector you could disconnect the 6.8k resistors that usually connect to pins 2 and 3 but as for camcorder mic power I have no idea.

 

[Biffa]

It's an XLR 3 pin female that delivers 48V in the normal way ( Distributed on pins 2+3 through 2 x 6K8 resistors so pins 1-2 read 48V as do 1-3). I need to plug a line signal, padded down 60 dB to mic level, into this input without getting power back to the line output. I figure Caps inline with each power leg would do the trick but I don't know values required.

Thanks


Biffa

 

[pinkmouse]

10uF is pretty common in this application.

 

[moamps]

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