Sale

Conrad Johnson PF-1 FET Pre-amplifier

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Vintage CJ

£2,000.00 £890.00


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The PF1 was the first solid state preamp bearing the
conrad-johnson name.
More than one decade of research and development led to the introduction of PF1. The circuit design featured a unique distortion canceling circuit that resulted in excellent linearity without resorting to global negative feedback. Independent discrete dc power supply regulators were used for each gain stage for absolute insolation between stages.
Parts quality was to conrad-johnson’s usual high standards. All capacitors, including power supply, were polypropylene and cjd polystyrene. There were no electrolytic capacitors in the PF1. All resistors were 1% metal-oxide deposited on glass construction resulting in very low noise. The PF1 nicely combined the lucidity and harmonic balance of c-j vacuum tube preamps with the superb definition and detail of transistor designs.

Brand: Conrad Johnson

Model Name/Number: PF-1 FET Pre-amplifier

Price (RRP): £2000

Choice Hifi Price: £890

Product Information:

Specifications:

  • Gain: Phono Stage 40 dB (phono overload 100 mV at 1kHz)
  • Line Stage 21 dB
  • Distortion: less than .1% THD or IMD
  • Response: bandpass 2Hz to more than 75kHz
  • RIAA Equalization: +/- .25 dB (20 to 20 kHz)
  • S/N Ratio: Phono Stage 80 dB below 10 mv input
  • Line Stage 94 dB below 2.5 volt output
  • Phase: Phono Stage is phase correct, Line Stage is phase inverting

Mechanical:

  • 19 x 3″ x 12″

Age: 30 Years

Condition: 9/10

Voltage: 220/240/50Hz

Finish/Colour: Gold facia

Packaging? Yes

Accessories? No

Item Location: In Stock

Status: Second Hand

Dimensions 5708473 cm