That's the point to this thread. I believe there is no simple answer, because it depends on a) the capacity, the rating of the transformer(s), b) the size and quality of the capacitor bank, and c) the PSRR of the amp, for both positive and negative rails, just for starters.
Also, do we want the amp to withstand heavy duty testing by a reviewer, just to be able to claim to be the next Krell, or merely to handle the demands of normal music content.
Frank
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Why are you continuing to bring this back into the discussion?
If you have new information on these that needs discussion that would be relevant to the topic then discuss, else leave it alone.
No.
It's not the same, as he stated.
you are looking at resistance as the sole load and ignoring all parasitics.
You are wrong on at least two counts.
The load is not pure resistance.
The supply is riddled with parasitics.
Thank you Andrew.
I have a feeling that liching1952 just feels like arguing for the sake of it.
Partridge was a British transformer company.
They weigh a standard bag of potatoes each, go by the name TH4663, afaig there are still a couple of shops that sell them to silly buggers for $1000.
(but if weight is your thing, how about 30lb each Partridge really high current chokes i wrenched out of pro-medical jogg/walking machines ?)
Basic physics says, only the resistive part of the load absorbs power, the imaginary part doesnt.
I'm not certain that is true. If you increase the quiescent supply rail voltage enough, it doesn't matter how much it droops (assuming PSRR is not an issue) so you can have a small cap. Your stored energy will increase because of the higher voltage. What you can do is calculate the smallest cap required, given a stated Vdc (exceeding Vpk by whatever margin you deem helpful). You can also calculate the minimum stored energy (see my earlier post) but that merely lets you then choose C (given Vdc) or choose Vdc (given C).gootee said:
I suspect you are all looking for the gold at the end of the rainbow: there is not an optimum value for C or Vdc, although there may be an optimum combination. Total 'AC in' to 'sound out' efficiency may be a useful parameter, as raising Vdc unnecessarily reduces efficiency.
Weight more or less gives an indication how they will perform at the lower end. If they are good, so build a good amp with KT100 or so. And what do you mean CLC. AndrewT wrote that it is a circuit smoothing thd power. Does it has anti hum windings for this purpose?
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