Product: Audio Research PH3 MM Tube Phono Preamplifier; PH-3; Moving Magnet
Product SKU: 28442
Serial Number: 46481009
Cosmetic Description: 8/10 Excellent condition with minimal visible cosmetic wear including light scratch marks around the screw holes in the top plate.This unit has been modified to have a 3 prong IEC AC inlet installed. This item does show a few blemishes but is attractive overall and has been well cared for.
What is Included: Preamplifier, Manual, Three Sovtek 6922 tubes, Power cable, Factory packaging
Functional Notes: Operational condition of this item is excellent, fully tested and no issues found.
# of Owners: Unknown
Tobacco Exposure: No
Service History: None
Other Notes: This item has been modified to have an IEC AC inlet for a removable power cable, rather than the original hard-wired power cable.
Total gain of the PH3 is 54 dB (non-adjustable). Used with typical line preamplifiers having 12 to 18 dB of gain, the PH3 is suitable for phono cartridges having .25 mV output or higher. Input impedance is factory-set at 47K ohms, and input capacitance at 90 pF. For optimal matching to moving-coil and moving-magnet phono cartridges, both input impedance and input capacitance may be adjusted via simple resistor and capacitor changes. (resistors sold separately)
"The PH3 is a phono preamplification stage intended for use with an active line-level stereo preamplifier. Fully single-ended from input to output, the PH3 uses a combination of J-FET input stage technology (for low inherent circuit noise) and class A operation vacuum-tube gain via three 6922 twin triodes."
Reviews: User Reviews
Shipping: Cost to ship this item within the contiguous United States is a flat rate of $37- including packaging and insurance. For all other locations including Hawaii, Puerto Rico and Alaska, please request a quote prior to purchase. Items with factory packaging will be double boxed. When factory packaging not available re-usable shipping box with custom injected-foam mold will be used. (for all items over 10 lbs). Note that all items valued over $750 will require a signature upon delivery.