CONRAD JOHNSONPF-1CONRAD JOHNSON PF-1 Preamplifier w/ PhonoConrad Johnson PF-1 Solid State Preamp with phono. This preamp was designed to give that sweet CJ sound without the tubes. When you listen to this preamp you will appreciate what Conrad Johnson's w...530.00

CONRAD JOHNSON PF-1 Preamplifier w/ Phono [Expired]


no longer for sale

Amended on

Conrad Johnson PF-1 Solid State Preamp with phono. This preamp was designed to give that sweet CJ sound without the tubes. When you listen to this preamp you will appreciate what Conrad Johnson's world class design, superior build and the very best components they use can achieve. Sound that is clean, and smooth and overall wonderful sounding.

From Conrad Johnson Website:

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 cj vacuum tube preamps with the superb definition and detail of transistor designs.

The version of the PF1.

Features:

Inputs/Outputs - Phono, Tuner, Auxiliary, monitor and recording facilities for two tape decks with dubbing from Tape 1 to Tape 2. Two power amplifier (Main) outputs.

Controls:

Selector, Tape1/Source/Tape2, Mode (left/right/stereo/rev/mono), Balance,Volume.

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"

Amended on

Conrad Johnson PF-1 Solid State Preamp with phono. This preamp was designed to give that sweet CJ sound without the tubes. When you listen to this preamp you will appreciate Conrad Johnson's world class design, superior build, and of course that smooth, clear overall wonderful sound. Please contact me with any questions.
Thank you.

From Conrad Johnson Website:

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 cj vacuum tube preamps with the superb definition and detail of transistor designs.

The version of the PF1.

Features:

Inputs/Outputs - Phono, Tuner, Auxiliary, monitor and recording facilities for two tape decks with dubbing from Tape 1 to Tape 2. Two power amplifier (Main) outputs.

Controls:

Selector, Tape1/Source/Tape2, Mode (left/right/stereo/rev/mono), Balance,Volume.

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"

Conrad Johnson PF-1 Solid State Preamp with phono. This preamp was designed to give that sweet CJ sound without the tubes. When you listen to this preamp you will appreciate what Conrad Johnson's world class design, superior build and the very best components they use can achieve. Sound that is clean, and smooth and overall wonderful sounding. See pictures of item for sale. For specs please go to the Conrad Johnson's website. Any questions please let me know. Thank You
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kencoq 

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