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In the Forum: Melquiades Amplifier
In the Thread: The one-stage Melquiades.
Post Subject: Another consideration for single-stage Milq: minimal capacitancePosted by Romy the Cat on: 5/1/2007

Another consideration where I am planning to make the single-stage Milq different will be the power supply for the thing.  The amp will have my typical SS fast-soft rectification with mandatory “gentle enter” LCRC filter, however I consider it to make it different from where I was before.

Usually I have quadruple (or more) inductance of critical inductance followed with a very small cap, then a decoupling resistor and as big ass last cap as I can get. In the regular full range Milq I use 10.000-15.000uF and it dose job. It is not juts about the ripples – they are irrelevant with this capacitance, but rather is it very beneficial for bass to have a huge capacitance tank.

However, I also noted that a large capacitance in PS’s filters make HF harder and less “connected” (red my post: http://www.GoodSoundClub.com/TreeItem.aspx?PostID=4307). So, my thought is to keep the PS capacities as low as possible for HF channels. From my two stage Milq experience I know that the amps has no nose at 620uF, so I am wiling to keep slightly above this level (probably 1000uF) and to go higher only for the upper bass channel. Frankly speaking I do not care about ripples as I do not see any relations between their size and quality of sound. I also did not see that the presents of theoretical un-auditable LF hum in any way modulate something auditable in auditable range. However, the minimum capacitate for HF channels I feel is very beneficial for space and “connectivity”…

Rgs,
Romy the Cat

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