It looks like Raul is on a roll again. There is some possibility a post of his will be removed, so I will not quote it. Instead I will generally address some of his benighted comments.
The calculator I linked to demonstrates that an electrical resonant peak exists with any cartridge. But it is a mistaken idea to assume that the peak has an influence at only one frequency. As you can see from the graphs, there is a rise in the frequency response curve prior to the peak; this is true of *any* resonance; the slope of the curve is defined by a value known as 'Q' (Quality) in radio terms (and is caused by how tightly the windings of the inductance are wound). The higher the Q value, the higher the peak and the steeper the curves on either side of it. From this we can see that the Q associated with MM cartridges is considerably lower than that for LOMC cartridges. This also means that its influence is spread out over a wider range of frequencies- the lower the Q the wider range of frequencies it influences. Here is the Wikipedia page regarding Q:
https://en.wikipedia.org/wiki/InductorAny signal that exists in the envelope is boosted. In addition, phase shift will exist below the cutoff of the resonance (this is basic filter theory); the ear perceives this as brightness since this is a peak rather than a dip. So the result is the brightness will enhance ticks and pops. Ticks and pops are high frequency in nature; this is why a 'scratch filter' seen in older audio gear rolls off the highs. This stuff should be pretty easy to understand.
I've seen the idea that a tick or a pop is not a repetitive signal; that its an impulse. We can see easily that this idea is false and quite laughable! This is because of the very simple fact that audio circuits amplify signals inside the audio band, and ticks and pops exist in the audio band as well (hence scratch filters affect them...). This means by definition that they **are** repetitive in nature albeit quite short. Further, its important to understand that not all ticks and pops have their origin on the LP surface as I've pointed out earlier: many phono preamps generate them due to poor high frequency overload margins in the front end of the phono circuit. This is common with opamp-based preamps as quite often where the overload is occurring is outside of the feedback loop of the circuit so it can't be corrected by feedback. Regardless of their source, ticks and pops are an audio frequency artifact, but if the playback apparatus is set up properly they can be minimized. To this point (also as I mentioned earlier) I am very used to playing entire album sides without any ticks or pops (so long as there are no actual scratches on the LP surface) and I don't clean my LPs with anything more than a carbon fiber dust brush.
Raul appears so willing to attack me that he's actually contradicting himself in order to do so. In this quote, which is from a post of his that has not been reported he says this:
No one approach 500mH.
But I only used that example in my prior post because Raul said this:
first than all Nagaoka is not MM design but IM similar to MI and the
like where normally internal inductance is not really high ( say over
600. )
-In that prior post of mine I even quoted the part above! In general, when you see someone engaging in this sort of behavior its not about fact anymore, its about making someone else 'wrong', often at any cost. Its my feeling this is the phenomena we are seeing here.
