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12AX7 Vacuum Tube Phono Preamplifier

Ok, so after buying a Sansui SR-1050C Turntable, I needed a phono preamp, so I built one.

This one uses no premium parts, but sounds great. It does have a small amount of 60Hz hum, and I plan on installing some tube shields as I know its been induced by the power transformer as the PS is completely clean. The preamp uses a pair of 12AX7 vacuum tubes.

The power supply uses a MOSFET for regulation and the preamp uses a passive RIAA equalization network.


Bernardo

ONKYO-DX-C380-CDP-Modifications.jpg 12AX7-Tube-Preamp-5AR4-Power-Supply.jpg 12AX7-Tube-Phono-Preamplifier.jpg Sansui-SR-1050C-Fully-Manual-Turntable.jpg S5-Electronics-K12G-Tube-Amp-Kit-Contents.jpg
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Filename:12AX7-Tube-Phono-Preamplifier.jpg
Album name:Vacuum Tube (Valve) Audio Projects
Filesize:148 KiB
Date added:Mar 08, 2009
Dimensions:1200 x 950 pixels
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