iFi SilentPower DC Blocker - Blocks any DC offset, IEC Connector

Product Information

The circuit as shown will also work perfectly with 120V 60Hz, but it would be wise to increase the capacitance (double the value shown here). Although the caps will work better with the higher frequency, the transformer idle current will be higher than that of a 220-240V transformer. A rumble filter simply adds to the bass cut making your already “cut” records sound bass light. Plus, it “time-steps” the bass in relation to the higher frequencies (where our hearing is most sensitive) so much so it can confuse the ear into believing the bass is playing out of tempo. iFi solution: Sonic improvements promised by the SupaNova power cable include greater clarity and definition plus enhanced dynamic range.

Regardless of whether the circuit is installed in the active (live) or neutral conductor, the insulation requirements do not change. There is no guarantee that the neutral will always be at earth potential. An incorrectly wired mains lead, power board, extension lead or power outlet can all make the active become the neutral and vice versa. Because of this, you must allow for the worst case and insulate accordingly.

DC Mains Supply

Lastly, the SupaNova active power cable takes the Nova and adds a cylindrical housing part way down its length. This cylinder contains Active Noise Cancellation II – the latest version of iFi’s proprietary noise-busting tech – in combination with advance-filtering components.

It's also worth noting that DC is usually not a problem with toroidal transformers of 300VA or less. Their primary resistance is usually high enough that any DC will have little effect. With larger transformers (500VA and above), the DC resistance is usually so low that even a very small offset will cause mechanical noise due to saturation. However, there can still be exceptions, and even some smaller transformers will suffer (and make noise) if there is any DC on the mains. understood, and that few (if any) DIY enthusiasts have performed serious tests on the various combinations referred to. This article is due to the forum posts and the obvious misunderstandings Allowable capacitor ripple current is dependent on one primary criterion - the physical size of the component (all other things being equal). A physically small cap has a small surface area, so is unable to dissipate heat. Heat is generated by the combination of the capacitor's ESR (equivalent series resistance) and current ( P = I²× R ), and small caps also have comparatively high ESR. With a small surface area, it's not difficult to cause overheating and subsequent failure.If the 500VA transformer is driven to full power (RMS current for the waveform shown is 2.06A), the ripple current through the capacitors will be the same as the transformer's current draw, but we determined the capacitance based on light loading. With 5.5A peaks, even high current diodes can be expected to have a forward voltage of at least 1V, and considerably more during the power-on inrush period.