Mic Pre Power Supply +/-15V 1.2A +48V 200mA

[garytoosweet]

Hello,

I hope I am in the right place.

I have some mic preamps with no power supply. The stock PSU is a linear supply +/-15V @ 1.2A and +48V @ 200mA (phantom power).

I would like to build a linear supply that can meet these specs. Off the shelf options like this guy seem too expensive. And I don't like the idea of shoving something on it's own chassis into my chassis.

Is there a generic power supply available that would supply the necessary quiet power? Possibly just as a PCB?

I have an electronics shop, mostly do repair. Should be easy to put something together but hoping for a somewhat off the shelf solution, not looking to design my own board. Hoping a generic PCB supply exists and I can just grab a chassis and toroidal PT and put it all together.

I did see the DIY Audio Universal Power Supply but the board is out of stock and not sure if it's the best option.

I figure I will probably have to use a separate board for phantom power.

Thanks in advance for any input.

 

[rayma]

Here's a few.
https://www.google.com/search?q=mic...d=0ahUKEwiKs9q82u71AhUGl4kEHXupC5AQuw0IgwQoAg

 

[garytoosweet]

Here's a few.
https://www.google.com/search?q=mic...d=0ahUKEwiKs9q82u71AhUGl4kEHXupC5AQuw0IgwQoAg

Thanks for the reply Rayma.

To shorten my question and be more clear: I am likely looking for a dual rail plus phantom power pcb that I can DIY that is capable or providing the power requirements in my title.

 

[rayma]

You can use a linear regulator IC for the 48V with a raw DC supply. But it will be a significant project to design and build.
https://www.ti.com/lit/ds/symlink/tl783.pdf?ts=1644266189209&ref_url=https%3A%2F%2Fwww.google.com%2F
But I would get this instead.
https://www.sweetwater.com/store/de...mCdqnpfxuCPzKu3akOBoCrgAQAvD_BwE&gclsrc=aw.ds
For the 15V supply you'll need a separate circuit and transformer. There are lots of pcbs and built-up boards for that.
The one you posted is a general purpose high power supply. You'll only need 100mA or less.
AN example: https://www.ebay.com/itm/273342376561?chn=ps&mkevt=1&mkcid=28

 

[garytoosweet]

For the 15V supply you'll need a separate circuit and transformer. There are lots of pcbs and built-up boards for that.
The one you posted is a general purpose high power supply. You'll only need 100mA or less.
AN example: https://www.ebay.com/itm/273342376561?chn=ps&mkevt=1&mkcid=28

Why do you think I'll only need 100mA or less?

 

[rayma]

That's a lot of op amps, but it's easy to turn up the current.

 

[PRR]

But I would get this instead.

Sixty bucks for a MONO supply, even if a Good Brand, seems steep to me?

The requested 200mA would support 16 or 20 Phantom mikes.

I don't see any clue if this is two 4mA chips or a 48 input all-frills console. "I need a truck, tell me what to get?" Well, for hauling beer or bullets or boulders? 6-packs or kegs?

 

[rayma]

You didn't say this was for 20 mics simultaneously, that's rather unusual.
Then you'll need a custom designed 48V circuit, and a fairly healthy op amp supply.
Won't be real small, due to the transformers and heat sinks. The LV supply you posted,
uses the large chassis for a heat sink.

 

[garytoosweet]

I don't see any clue if this is two 4mA chips or a 48 input all-frills console. "I need a truck, tell me what to get?" Well, for hauling beer or bullets or boulders? 6-packs or kegs?

I would like to meet the original PSU specs as listed in my original message.

+/-15V 1.2A +48V 200mA​