Mic PSUs and how they work??

[Greenie]

Wondering if anyone have a site to update my knowlewdge on tube mic transformers and how they work and what make the different?

 

[Khron]

Do you mean the transformers in the power supplies, or the transformers inside the microphones themselves?

 

[Greenie]

I mean the outside PSU.

 

[gyraf]

Look e.g. at the G7 psu..?

https://gyraf.dk/wp-content/uploads/2018/05/DIY-Tube-Microphone.pdf
/Jakob E.

 

[Khron]

They step down the incoming AC, rectify it, smooth it and filter it, in order to provide 4-6.3v for the tube heater(s), and 120-210v for the tube plate / anode.

... Unless you're maybe asking the wrong question for what you're trying to find out..?

 

[Greenie]

Thanks, I wonder how to determin what voltage the different mics need to them to operate. IKnstead of building one transformer for each mic, maybe do on for all?

 

[Khron]

That's a bit like "how long is a piece of string?".

Point being - it depends (on the actual circuit each tube mic employs).