The 'tube-transistor' enigma by MC carts?

@bimasta Here is some info translated from Japanese about Air Core Coil of Fidelity-Research PMC-3 :

" Air core coil is adopted as coil, weighing is realized compared to ordinary coil part made of magnetic material as core material, and magnetostriction caused by hysteresis curve of core material is expelled. In addition, by adopting a new special lightweight resin coil bobbin, the total weight of the oscillator is reduced to about 1/3, and the tracking ability is improved.... Samarium cobalt magnet is adopted as a magnetic circuit. This material has an ideal characteristic that it has higher holding power compared with ordinary Alnico type and it is hard to self-demagnetize. Moreover, the yoke part can also be downsized, the cartridge’s own weight is drastically reduced, and the initial characteristics can be kept for a long time.... Precision cutting is applied to the yoke to make the entire magnetic circuit close to a circular shape. As a result, effective magnetic path length can be shortened, size can be reduced, and magnetic flux leakage at the corner portion is reduced to achieve high efficiency.... A 0.04 mm diameter net flow line is adopted as the coil. "

Last month i have opened my headamp designed by Nakatsuka-San. The reason to unscrew it was expired batteries. It was a first time when i saw input resistors like that. Those resistors looks like an MC cartridge coil and made by winding the wire to a coil that has no inductance in a special process. Those resistors made by ZYX to transfer the output signals with no noise and no inductance at all. They are made of pure coil wire of MC cartridges, cryogenically purified. Signal from LOMC cartridge should go into ZYX CPP-1 Headamp’s resistor wihtout any influences from resistor noise and inductance. Nakatsuka-San decided to use his own resistors made of pure copper wire, same material as a copper wire of MC carts. In order to playback the sound info of LOMC carts in 100% fidelity, CPP-1 headamp has special circuit in the simplest amplification circuit.

Great device to avoid SUT !

@nandric 

Dear chakster, ''Great device to avoid SUT'' is obviously meant

to ''belittle'' your Slavic brother. But if I am well informed you just

bought some cheap Italian phono-pre dismissing this way your

technical praise about ZYX CPP-1. The other possible reason is

 your  effort  to sell this ZYX to me. I am sorry but I am happy

with my Basis Exclusive as well with my Klyne 7PX 3.5 + Denon

AU-S1.

No, ZYX CPP-1 is a keeper, i like it a lot with some of the MC cartridges, particulary with my Klipsch MCZ. I thought someone can comment about ZYX unique input resistors made of a cartridge coil wire. It's a know how. I think it's a compliment to a LOMC cartridge to amplify signal like that. It's like external cartridge coil with more wire not inside the cartridge, but outside the cartridge in a separate box.  

@lewm you are welcome to argue with ZYX, but first look the my picture of this device and its input resistors which looks like a coil, i hope you know how thin is a coil wire of ZYX MC cartridge? The technical advantages stated in the manual and this is when i got my information from.

It’s 0.035mm/Cryo (6N Crystallized Copper Wire).

They call it "ideal coil wire made for the first time in the world. it has been developed for ZYX by both a wire manufacturer and a processing company of cryogenic treatment in 2002. The wire consists of pure crystals of copper, and that are systematically aligned."

CPP-1 Technical Data:
Input Impedance: 125 ohm
Step up ratio: 26dB
Signal-to-Noise ratio: more than 95dB
THD: lower than 0.1% (1kHz)
Frequency Response: 1Hz - 1MkHz (+/- 1dB: 2Hz - 500kHz)
Channel Balance: lower than 0.01dB (1kHz)
Channel Separation: more than 100dB  (1kHz)
Battery: 9 pcs of KR-1100AAu (1.2V 1100mAh)
Power: 0.8W

@atmasphere

Just so you know, 6Nines copper wire does not exist. The best anyone has done is 5Nines and that claim seems highly suspect!

There you go:

6N Copper:
https://www.americanelements.com/6n-999999-copper-metal-7440-50-8

ZYX Coil Wire type is 6N OFC Crystal Copper φ 0.035mm :
http://www.zyx-audio.com/products_mc_ultimate_series_dynamic.html

ZYX CPP-1:
http://www.zyx-audio.com/products_phonoamps_cpp1.html

It would cause the normal resonance at the input to be lowered in frequency, and perhaps pretty dramatically. We uses non-inductive devices for precisely this reason.

From my manual of ZYX CPP-1: "The resistors is made by winding the wire to a coil that has no inductance in a special process. Then our resistor can transfer the output signals with no noise and NO INDUCTANCE at all. "

The best anyone has done is 5Nines and that claim seems highly suspect!

Ortofon made 8N copper wire for the coil of SPU Spirit Limited Edition model (only 500 made), you can download manual to make sure (i’ve owned this cartridge): https://www.vinylengine.com/library/ortofon/spu-spirit.shtml