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Better Solid State Phono Sections
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Eiron
Posts: n/a
wrote:
We were kicking around the concept that the phono section should be at
the turntable instead of the preamp, indeed, if you have a stereo amp
with volume control you shouldn't need a preamp, but also because the
phono section should be close, very close, to the cartridge, as with a
tube or FET condenser mic.
What are some good solid state phono section designs? Should they
treat the cartridge as a balanced source (four wire) or not and should
plus and minus DC rails be needed or should a monopolar supply be used?
What have you readers out there built and liked?
A useful modification that you can do with the preamp close to the
cartridge is:
Normal - cartrige is connected between ground and +in,
feedback is to -in.
Mod - ground is connected to +in, cartridge is between the feedback
point and -in.
This was used in the E.F. Taylor preamp from Wireless World in 1977?
and reduces distortion significantly, while needing very little change
to a normal circuit.
--
Eiron.
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