Hello to all!
I have this idea of using small value (0.25uH) air core 16 gauge inductors directly after a bridge rectifier on the + and - rails before the large capacitors (+/- 14,000 uF) in a power amplifier. The idea is to create a very high frequency low pass roll off filter for the power rails of the amplifier output section. Would doing this sort of thing create a problem for the amplifier stability, or even work properly or at all? Greatly appreciate any input or views!
Thanks....
Dan
I have this idea of using small value (0.25uH) air core 16 gauge inductors directly after a bridge rectifier on the + and - rails before the large capacitors (+/- 14,000 uF) in a power amplifier. The idea is to create a very high frequency low pass roll off filter for the power rails of the amplifier output section. Would doing this sort of thing create a problem for the amplifier stability, or even work properly or at all? Greatly appreciate any input or views!
Thanks....
Dan
it is useful for a switching power supply, but normal power transformer power supply is not much needed. It will no harm to use these inductors, but most of the commercial amp don't do this.
My idea of the high frequency inductors is that they would help to eliminate very high frequency noise that might get into the active circuits (RFI and such), and help to create a better noise floor, and reduce possible interaction into the audio band. And do this without having a negative dynamic effect on current delivery to the output stage of the power amplifier.
Hello.
It's works at specific amount current => Class A amplifier.
Otherwise, it's useless.
And of course, as any serial components, you will loose current power supply.
Better to use Pi EMI filters on AC plug (if needed) .
It's works at specific amount current => Class A amplifier.
Otherwise, it's useless.
And of course, as any serial components, you will loose current power supply.
Better to use Pi EMI filters on AC plug (if needed) .
Fast calculation to clearify:
Fo = 1 / ( sqrt ( 2 * π * L * C) )
Given values 14.000µf and 0.25µH yields a turnover frequency of some 7.0 kHz.
Theory is useless these days, but be sure the inductors can carry the continuous and momentary peak currents.
Edit: when I type a pi sign, this board shows an π...
(in the edit, I typed the pi sign and what shows up..?)
Fo = 1 / ( sqrt ( 2 * π * L * C) )
Given values 14.000µf and 0.25µH yields a turnover frequency of some 7.0 kHz.
Theory is useless these days, but be sure the inductors can carry the continuous and momentary peak currents.
Edit: when I type a pi sign, this board shows an π...
(in the edit, I typed the pi sign and what shows up..?)