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Old 25th June 2012, 10:44 AM   #11
DF96 is offline DF96  England
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Where is the 'standard' RIAA circuit? Time constants 3180, 318, 75 us? Do none of your LPs use this equalisation? What you have called Basic RIAA is not RIAA but a rough approximation to the LF end of it.
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Old 25th June 2012, 02:59 PM   #12
TheGimp is offline TheGimp  United States
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Interesting idea of using selectable networks, but I wonder how much noise this will introduce into the circuit.
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Old 25th June 2012, 03:12 PM   #13
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In the book of Langford & Smith there is an entire chapter dedicated to multiple disk equalizer networks.
Osvaldo F. Zappacosta. Electronic Engineer UTN FRA from 2001.
Argentine Ham Radio LW1DSE since 1987.
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Old 25th June 2012, 04:22 PM   #14
tmblack is offline tmblack  United Kingdom
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It is common to use negative feedback loops; see Audio Research SP3, SP6 almost all use similar design.
What is the noise level of a 6922 and how does it compare to a 12ax7a?
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