Conrad Johnson PV10A All Tube Preamp with Phono Input

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We receive C-J preamps from time-to-time, but they're usually just line stage variety that lacks a phono input to connect your turntable.

Whenever we list one with phono capability we receive lots of calls and emails even *after* it's sold!

Just serviced and ready to please for another 30 years. In overall very good cosmetic condition with little signs of use.

Includes a solid built-in phono stage which is always desirable for fans of the brand.

Please see our photos for full specifications.

Service Notes:

• Controls cleaned
• All tubes tested on our modern and professional vaccum tube tester, the Amplitrex AT-1000.
• The line stage was fitted with a gain-matched pair of NOS Philips 5814A tubes (Ruggedized Military Version of 12AU7).
• The phono stage has a pair of current production gain-matched Mullard 12AX7 tubes, and a Philips JAN 12AT7

The SkyFi Testing Process for Preamplifiers:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. Special attention is paid to the power supply which is the most common source of failure for preamps. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline.

At this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching.

Final testing involves putting actual music through the preamplifier We have learned over time that some issues are only noticeable to a trained ear while listening to a familiar source material. Our test bench has reference vintage KEF speakers that we are super familiar with which will quickly reveal any discrepancies. Some preamps will then move into the listening room where they will be tested with our in-house reference system.

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.