PSUD guru required [Archive] - The Art of Sound Forum

RobsterD

25-03-2021, 19:24

Hi
I’m after someone experienced in PSUD to optimise my SIT amps power supplies.
Currently running a CLC but not sure if my choke at 2.5mH/10amp is correct replacing a 1ohm/100w resistor in a CRC config.
Any help appreciated
Rob

Firebottle

25-03-2021, 21:09

Your 2.5mH choke is only equivalent to a 1.5 ohm resistor, so no real change.

Can you get a choke with 10's of mH with the required current rating?

Firebottle

26-03-2021, 07:10

Alternatively you could go CLCLC if you have the space.

RobsterD

27-03-2021, 12:24

Hi Alan
Thanks for that here is the cct diagram for ref

https://i.imgur.com/BY7A9EH.png?1

Firebottle

27-03-2021, 12:49

OK. What voltage drop do you get across the 1 ohm in normal operation?

Do you have something like a 2A current flow through the SIT?

RobsterD

27-03-2021, 13:03

Hi Alan R1 is replaced with the 2.5mh choke never measured the voltage drop across R1 .
The current Id is adjustable sweet spot is around 2.5amp can run it to max 3amp