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actually can not use the condenser upstream of the RIAA is only apparent advantage. Report the RIAA bridged T upstream is not only more complex, more results in the loss of the biggest advantages typical it works and why not to adopt this solution.
remains only a valuable way: calculate an impedance for the RIAA more.
This would use a smaller decoupling capacitor, making it possible to use a higher-quality components (eg, silver mica or polystyrene slabs in an oil bath under glass) and allow the pilot with a simple, pure, triode.
must have thought the same thing Thorsten, because my knowledge should be to implement your requests by Stevens & Billington version of 10-ohm bridged the RIAA LCR T.
But on this component there are several mysterious aspects, that join to form a real case. Reference to the near post detailed account of this affair.
Meanwhile monster one possible solution to reduce the drawbacks associated with the down gain due to impedance matching transformer.
is superfluous to say, but the adoption of the mu triodes much higher than common, it is undoubtedly useful for this purpose.
Among several possible examples, I choose the more whimsical, by a devotee of the top audio Nouvelle vogue, Thomas Mayer (one of 3 or 4 at the end of the last century in search of EC8020)
The valve is used very unusual
mu
300 Gm 65 mA / V Ri
4600 ohm
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