Please consider donating to help us continue to serve you.
Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
||Thread Tools||Search this Thread|
|13th December 2012, 10:02 AM||#1|
Join Date: Feb 2009
CRC Pi Filter resistor value
Hi, I need a 30V supply for a Class A amplifier biased at 1.5A. The transformer I have is 25v secondary, which gives me approx 35VDC after rectifacation and filtering ( with a 1.5 A load ). If I use a Pi filter with an R of 3.3 ohms I can get the reqired 30 V at the second C. Are there any problems with this arrangment for Class A ?
|13th December 2012, 12:10 PM||#2|
Join Date: Nov 2003
Location: Brighton UK
Essentially I can't see any, unless .....
The question is for a lot of class A amplifiers is what happens
when you run out of current (depending on speaker load ....)
Some enter class B for both voltage swings, some current
limit for one swing and enter class B for the other, some
do a bit of both, and rarely they symmetrically current clip.
Any excess current drawn might need you to uprate the resistor.
FWIW a capacitance multiplier should give you about the same
voltage drop with a lot less ripple (it does not regulate though).
Capacitance Multiplier Power Supply Filter
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|PI-filter (or CLC vs CRC vs C)||Cloth Ears||Pass Labs||75||11th October 2013 07:27 PM|
|CRC Filter ?||kacernator||Tubes / Valves||2||31st July 2009 11:15 AM|
|crc pi filter||tenderland||Power Supplies||3||3rd January 2007 07:50 AM|
|on me more serious note....Aleph 1.2 CRC pi PSU||Clarkcr||Pass Labs||2||17th September 2004 10:28 PM|
|Formula for CRC Filter||Rarkov||Parts||7||21st January 2004 09:22 PM|
|New To Site?||Need Help?|