Precision jFET v6.0 RIAA Benutzerhandbuch Seite 4

Eingangskapazität einstellen
Kapazität ca 5 pF
100 pF
150 pF
Verstärkung (Gain) einstellen
Gain +36,5 dB
Hauptmerkmale von Precision jFET v6.0 RIAA PEAMP
:: Input RIAA: MM Tonabnehmer, 4 mV .... 8 mV (RMS);
:: Input impedance:
:: R: 33 kOhm - 47 kOhm - 99 kOhm; C: 5 pF - 100 pF - 150 pF - 250 pF;
:: Gain at 1 kHz: +36,5 dB oder +42,5 dB;
:: Output RIAA recording curve: 0 dB (0,775 V RMS);
:: Signal/Noise: better than 88 dB ( non weighted ! );
:: Signal/Noise at 1 kHz: better than 120 dB (A-weighting);
:: Passiver Filtermodus für RIAA-Entzerrung;
:: Deviation RIAA curve 20 Hz .... 20 kHz
:: and also gain difference between R / L: less +/- 0,2 dB;
:: Direct Mode (ICs Output):
:: Output impedance: 27 Ohm, max Belastung: 1 kOhm;
:: Distortion: 2. Harmonic: -98 dB; 3. Harmonic: -115 dB;
:: Headroom Direct Mode: ca. 20 dB;
:: Warm Mode (Class A jFET-Ausgangsstufe):
:: Output impedance: 1 kOhm, max Belastung: 2 kOhm;
:: Distortion: 2. Harmonic: -32 dB .... -38 dB; 3. Harmonic: -45 dB ... -65 dB,
:: (depending on the cartridge output voltage and gain);
:: Headroom jFET Warm Mode: ca. 10 dB;
:: Measurements were done when the THD reached -24 dB.
:: High Performance & high Fidelity AUDIO operational amplifier, ultra low noise ICs
:: jFETs: 2SK117 Toshiba;
:: PP-Kondensatoren von WIMA (Polypropylen);
:: Supply: toroidal transformer from Talema;
:: Schottky rectifier bridge;
:: HF-Filterung: toroidal choke common mode from Talema;
:: Topologie common line ist eine Sternschaltung (single-point ground);
:: Vergoldete Cinch RCA L/R;
:: Spannungsversorgung: 230 V AC, Verbrauch etwa 1,2 Watt;
:: Massives Vollmetallgehäuse: Aluminium eloxiert;
:: Gewicht: 940 gramm;
:: Maße: 185 x 105 x 55 mm.
Copyright © 2017 - 2022, Jürgen Maier, Berlin Germany
Vacuum tube project 7tubes: Precision jFET v6.0 RIAA Preamplifier
Kapazität 100 pF
100 pF
150 pF
Kapazität 150 pF
100 pF
150 pF
Gain +42,5 dB
Kapazität 250 pF
100 pF
150 pF
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