RIAA amp using shunt feedback

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#62
forr said:
I do not think having ever read comments or experiences about Eric F. Taylor's phono preamp where the non-inteverting input of the circuit is connected to ground. It combines the advantages of low noise and low common mode distortion. The signal input is floating. It was described in a fairly known article : Eric F. Taylor 'Distorsion in low noise amplifiers' Electronics World August 1977, page 56.
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This article is in the attachment from my previous post.
Are there commercial MM Phono-RIAA pre-amplifiers using this topology from page 56 of this article?
 
#64
This is my latest version of RIAA amp meant for MM cartridges. It features a pot in the front panel for setting the cartridge coil load. As MM cartridge is highly sensitive to the load that it sees in the amp input, this option is well needed. Rotating the pot knob anticlockwise reduces the input resistance and makes the cartridge sound darker. Since there is no scale for the resistance value, the optimal setting must be judged by ear which makes the pot act like a tone control. Loading with 47k resistor is also possible by switching the pot off but this often results to sound that is too bright and restless.

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#65
Stan Curtis` Class A System from the mid -80 clearly should be mentioned in this context. All shunt fb. In small sweet boxes a la Meridian et al from the same timeperiod.
A few weeks back a preamp from that system was even offered for sale.

R
 
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