star earth and FlatCap2
Posted by: Hans 67 on 22 February 2003
Hello all,
connecting a NAC, CAP and NAP in the Naim way has some big advantages (nothing new yet). For instance there is a current loop from the transformer of the NAP to the transformer of the CAP via the SNAIC and back via the mains. Back via the mains is possible because the transformers have a parasitic capacitance. And this capacitance is relatively high because of the large transformers Naim is using. But there is no problem because the current stays out of the NAC!
Suppose you have a CD5 and you connect a Hi-Cap to it. Then it is possible that a current (as described above) can flow between the Hi-Cap of the CD5 and the other transformers (in the NAP and possibly the NAC). Now this current flows through the NAC! And I do not like that!
But there is a FlatCap2. This CAP is the only one with two outputs. And it is the cheapest? If you use the FlatCap2 to power the CD5 and your NAC then you do NOT have the problem that I describe above! Why? Because the current that wants to flow from the NAP to the half of the FlatCap2 that is powering the CD5, that current will be trapped by the half of the FlatCap2 that is powering the NAC. And of coarse there will be no current flow between the two halves of the FlatCap2. Thus no current through the NAC!
Do we want a grown up FlatCap2? Full width, full height, a large transformer, two equal outputs, etc.. It can also power a NAC 82!
Greetings, Hans
connecting a NAC, CAP and NAP in the Naim way has some big advantages (nothing new yet). For instance there is a current loop from the transformer of the NAP to the transformer of the CAP via the SNAIC and back via the mains. Back via the mains is possible because the transformers have a parasitic capacitance. And this capacitance is relatively high because of the large transformers Naim is using. But there is no problem because the current stays out of the NAC!
Suppose you have a CD5 and you connect a Hi-Cap to it. Then it is possible that a current (as described above) can flow between the Hi-Cap of the CD5 and the other transformers (in the NAP and possibly the NAC). Now this current flows through the NAC! And I do not like that!
But there is a FlatCap2. This CAP is the only one with two outputs. And it is the cheapest? If you use the FlatCap2 to power the CD5 and your NAC then you do NOT have the problem that I describe above! Why? Because the current that wants to flow from the NAP to the half of the FlatCap2 that is powering the CD5, that current will be trapped by the half of the FlatCap2 that is powering the NAC. And of coarse there will be no current flow between the two halves of the FlatCap2. Thus no current through the NAC!
Do we want a grown up FlatCap2? Full width, full height, a large transformer, two equal outputs, etc.. It can also power a NAC 82!
Greetings, Hans