Looking For a Phantom Power PCB With 15VAC Input

[cpsmusic]

Hi Folks,

I'm currently repairing a tube mic pre built by my late-Father. To get the 48V phantom power he tapped the HT which I can see is a bit dangerous! The power transformer has a 15VAC winding which I would like to use for phantom power. Does anyone know of a PCB that would be suitable for this (15VAC -> 48VDC). The only one I've been able to find is the G9 although it has additional sections that I don't need.

Cheers,

Chris

 

[radardoug]

Just build it up on veroboard or tagstrips. Its only half a dozen components.

 

[user 37518]

Hi Folks,

I'm currently repairing a tube mic pre built by my late-Father. To get the 48V phantom power he tapped the HT which I can see is a bit dangerous! The power transformer has a 15VAC winding which I would like to use for phantom power. Does anyone know of a PCB that would be suitable for this (15VAC -> 48VDC). The only one I've been able to find is the G9 although it has additional sections that I don't need.

Cheers,

Chris

If you want 48V from 15V you need what is called a boost converter, it is a switching converter that will raise the voltage, however it will need some filtering.

 

[cpsmusic]

Just build it up on veroboard or tagstrips. Its only half a dozen components.

Yes, I was thinking of doing that but I thought I'd check if there was a PCB first.

Cheers!

 

[Khron]

Not necessarily - you'll note the thread title says "15V AC". With that, just a simple voltage tripler might suffice


https://en.m.wikipedia.org/wiki/Cockcroft%E2%80%93Walton_generator

https://www.electronics-tutorials.ws/blog/voltage-multiplier-circuit.html

If you want 48V from 15V you need what is called a boost converter, it is a switching converter that will raise the voltage, however it will need some filtering.

 

[analogguru]

Not necessarily - you'll note the thread title says "15V AC". With that, just a simple voltage tripler might suffice

The innards of such a unit do this trick:
https://www.ebay.com/itm/AC-48V-Phantom-Power-Supply-USB-Power-Adapter-For-Micro-Condenser-X5P6-M2P5/174311917973?hash=item2895ccc995:g:3uYAAOSwB7le3~CL