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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Where is the smoking gun?Posted by Romy the Cat on: 12/8/2010
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 Bud wrote:
Yes. Their is a direct correlation between surge current and dielectric materials dielectric constant. The voltages in question are high enough to use a thick dielectric material and just as with the effective resistance of the capacitor, there is a time constant to energy release from a dielectric material. This would never be an issue in normal terms. I realize that you consider SET's to have a constant current draw and this is mostly true, but peak current draw may be quite a different thing with power hungry mid bass signals.
Bud, isn’t it the definition of class A operation that the current draw is constant? There is no such a thing as peak current draw in SET amp. Current is constant routing from heating tube to driving loudspeakers. When I connect current meter to my amps then current does change but it does not change with signal but rather is changes with time for warming transformers, chokes as for other similar type of things. There is absolutely no peak current draw that I might see. Also do not forget that my bass channel on Melquiades has LC with something like 20.000uF capacitance of the last cap at B+. With this capacitance and with just 250mA currant it is absolutely imposable to affect PS.
 Bud wrote:
That the PP2000 cannot draw enough power to satisfy the system needs from the power line and it's essentially infinite reserve but can draw it from the battery pack says to me that there is a current limiting device in the AC to AC to DC supply circuit., before the battery float point which is at that DC point. Maybe a CLC filter would solve the problem.

OK, if it was the case then shall I be able to see the voltage drop at the time when PP2000 cannot draw enough power? I did not see any voltage drop in PP2000. I use my class A/B SS ams and drove it at 0dB with 30Hz filter. The amps were literally choking with signal but the PP2000 kept output very stable nominal voltage. I did look for 10-12 periods with real-time analog scope and I was expecting to see some of them sink. It did not happen.

Rgs, Romy the Cat

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