'd' just like any other topology has good and bad examples.
PF correction is used to help present a more resistive load to the power company. Large factories are penalized by the electric company when there PF drops below 0.9 or so, which is a moderate phase angle. I have measured my 40watt fluorescent tube at 0.8, when warmed up.
If such a circuit is presented B4 the amplifier, the amp's power supply need not be any different than without the PF correction circuit.
I have not yet measured my 'd' amp's PF, but will have data within a week. I suspect the PF to change as a function of load on the amp, but not sure in which direction it will go. I will be able to measure total draw, as well.
The Spectron amp is an animal. A very large number of smaller caps on each rail is featured in the power supply for lower resistance. Quite an amp, at least on paper. I'd like to hear it on my Maggies.
PF correction is used to help present a more resistive load to the power company. Large factories are penalized by the electric company when there PF drops below 0.9 or so, which is a moderate phase angle. I have measured my 40watt fluorescent tube at 0.8, when warmed up.
If such a circuit is presented B4 the amplifier, the amp's power supply need not be any different than without the PF correction circuit.
I have not yet measured my 'd' amp's PF, but will have data within a week. I suspect the PF to change as a function of load on the amp, but not sure in which direction it will go. I will be able to measure total draw, as well.
The Spectron amp is an animal. A very large number of smaller caps on each rail is featured in the power supply for lower resistance. Quite an amp, at least on paper. I'd like to hear it on my Maggies.