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All in a picture...
Omnes feriunt, ultima necat.
B and E are the only ones with sinusoidal ripply. Add one more choke and one more cap to E and be happy.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Hard to beat choke input supplies. Agree on an extra LC to make even better.
Choke input supplies need at lease a small capacitor ahead of the choke. Otherwise, the choke creates large voltage spikes at its input terminal and significant EMI that will travel throughout the amplifier.
,°.47 cap.... .32 Henry 600 ma. choke 10 ohm, 20 uf film cap, .7 filament choke dcr .7 (this thing is huge and comes from old Allen organs FOR filament) 50 uf film cap... Then use 10uf for rest of the circuit save for Elna Silmic 2 63 or 100 uf for filament. Depends on circuit.
The Mind has No Firewall~ U.S. Army War College.
,°.47 cap.... .32 Henry 600 ma. choke 10 ohm, 20 uf film cap, .7 filament choke dcr .7 (this thing is huge and comes from old Allen organs FOR filament) 50 uf film cap... Then use 10uf for rest of the circuit save for Elna Silmic 2 63 or 100 uf for filament. Depends on circuit.
The Mind has No Firewall~ U.S. Army War College.
!
The Mind has No Firewall~ U.S. Army War College.
If the choke is designed for that use, a relatively high AC voltage across it, there isn't a problem.
There's more to this than ripple content. Output impedance of the supply and EMI radiation are also important characteristics for an audio amplifier. The most suitable in your illustration are the "C" filter and the "CLC." All the others are problematic for various reasons.
too bad chokes are costly. They do wonderful things for the quality of amp power supplies. And it's time more audiophiles realized the power supply is the direct source of current to the speakers. What we call the amplifier is a complex circuit that basically opens and closes the power supply so it looks like a bigger version of the input. So the more perfect the power supply the more perfect the amplifier.
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