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2011 | OriginalPaper | Buchkapitel

13. Noise of MM Cartridges

verfasst von : Dipl.-Ing. Burkhard Vogel

Erschienen in: The Sound of Silence

Verlag: Springer Berlin Heidelberg

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Abstract

The design of hum- and noiseless RIAA pre-amplifiers is really a kind of art. The existence of a great variety of circuit designs tells many stories about chases after high signal-to-noise ratios (SN), overload matters, and fights for precision of the RIAA transfer. Solutions proposed in the past to use – as substitute – resistors or inductors1 at the input of a RIAA amplifier for noise measurement purposes or to set on mathematical octave-band analysis2 to get SN results close to the measured ones (with MM cartridge as input load) do not satisfy. In addition, hum spoils many measurement attempts and the optimal loading capacitance of the MM cartridge is quite often not taken into account of calculations or measurements.

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Fußnoten
1
“Low noise audio amplifiers”, H. P. Walker, EW 05-1972.
 
2
“AN-104”, Jim Sherwin, National Semiconductor Application note, Linear Applications Data book 1986.
 
3
Mathcad is a registered trademark of MathSoft Engineering and Education, Inc., USA, since 2006 part of Parametric Technology Corporation (PTC), MA., USA.
 
4
“Noise and moving-magnet cartridges”, Marcel van Gevel, EW 10-2003.
 
5
“PC controlled audio measurement systems”, Elector Electronics 05-1995.
 
6
Clio 6.5 is a registered trade mark of AUDIOMATICA SRL, Italy.
 
7
EXCEL is a registered trademark of Microsoft, Inc., USA.
 
8
“Simple formulae for skin effect”, Leslie Green, EW 10-2003.
 
9
“A puzzling model”, Marcel van de Gevel, Letters EW 08-2005.
 
10
D/S, Chaps.​ 5 and 7.
 
11
“Designing low-noise audio amplifiers”, Wilfried Adam, EW 06-1989.
 
12
“Rumble-/Subsonic-Filter”, Elector Electronics 07/08-1990.
 
13
“Special Linear Reference Manual”, Analog Devices 1992, p. 4-12, Fig. 10.
 
14
Worksheet 14.1 of Chap.​ 14.
 
15
T/S Chaps.​ 2 and 5.
 
16
“AN-104”, Jim Sherwin, National Semiconductor Application note, Linear Applications Data book 1986.
 
17
Hitachi data sheet.
 
18
“AN 222”, National Semiconductor Application Note, Linear Applications Data Book, 1986.
 
20
“Noise in Transistor Circuits”, P. J. Baxandall, EW 11- and 12-1968.
 
21
“AN 222”.
 
22
Worksheet 14.2, see Chap. 14.
 
23
“Noise and moving-magnet cartridges”, Marcel van de Gevel, EW 10-2003.
 
24
“Noise in Operational Amplifier Circuits”, Analogue Dialogue Vol. 3, March 1969, L. Smith and D. H. Sheingold.
 
26
“RIAA-Isierung”, J. W. van Dael, J. A. Kruithof, Elektor 11-1973 (written in German and Dutch only).
 
27
Also published by the author in EW 12-2004: “Precision A-weighting filter”.
 
28
T/S Chap. 2.
 
29
The type of modulation is not indicated in the V15V data sheet; in this example I simply assume flank modulation (see Chap.​ 3).
 
30
“Reference, Trackability and Frequency Test Record”, Deutsche Grammophon Gesellschaft no. 10 99 112.
 
31
Same problem like the one with the V15V.
 
Metadaten
Titel
Noise of MM Cartridges
verfasst von
Dipl.-Ing. Burkhard Vogel
Copyright-Jahr
2011
Verlag
Springer Berlin Heidelberg
DOI
https://doi.org/10.1007/978-3-642-19774-1_13

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