Old Turntables Repair & Restoration

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Phono preamplifier.

The MM phono preamplifier is built on three vacuum tubes 12AX7, 12AX7, 12AU7.

The anode feed utilizes vacuum rectifier 6X4 with 4-stage RC filter, then each channel is powered separately by circuits with 3-stage RC filters.

The vacuum tube filament circuits are powered by DC with a smooth start and voltage stabilizer system. The interstage capacitors are Sprague Vitamin Q.

The mounting wire is vintage paper insulated one made of Chilean copper.

The phono preamplifier is structurally divided into 2 parts – the power supply and the amplifier – by copper-plated steel plate.

The front panel contains the rotary type power switch and the filament lamp power indicator.

The rear panel contains input and output RCA sockets, ground terminal and power socket. There is also the 220/110 V switch. There are tube cooling vent holes on the top and the side of the cabinet.

The unit is supplied with vacuum tubes Baldwin, RCA, Matsushita.

The cabinet and the chassis are made of steel. The chassis is copper-plated.

The unit weight is 8 kg.

1200 USD. Free shipping.

 

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Clamp
Clamp
Phono preamplifier.
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