Phantom power circuit

[FUZZZZzzzz]

Hi guys,

Its been a while since Ive posted. Been busy with the completion of my studio space. I need some advice. I have an 8 track tape recorder that has its own preamps and eq etc. The only thing lacking is phantom power. I thought I could make an 8 channel phantom power. So I can switch it on or off per channel. I need something that adds phantom but doesnt color the sound as a preamp with phantom would do.  Im having a hard time finding schematics that will do just that. It will need a mic in and output and also a switch for the phantom.

any ideas or suggestions?

[teemuk]

There are three standard specifications for phantom power, P12, P24 and P48, and they pretty much outline the associated circuit. Basically, they define the phantom power supply voltage and maximum current draw, and therefore resistance of the reference resistors for the balanced signal lines. They should be pretty self-explanatory.

Rest is generic switching, supply voltage regulation and obligatory peak voltage clamping.

[anotherjim]

Assuming the recorder has balanced inputs, you need to know if those inputs can stand having 48v referenced to XLR ground applied to hot & cold via 6k8 resistors . If not, you're going to need transformers?

[PRR]

https://www.amazon.com/2-Channel-Condenser-Microphones-Transfer-External/dp/B01J5M2GO6
https://www.amazon.com/NUOSIYA-2-Channel-Technology-Anti-noise-Microphone/dp/B085BZN5TT

[FUZZZZzzzz]

I think buying one is indeed an option looking at the prices of some..

https://www.bhphotovideo.com/c/product/1316286-REG/rolls_rpb488_phantom_eight_8_channel.html