Dynavector DV-3000
¥ 230,000 (around 1976)
Commentary
A control amplifier developed as an advanced model of the on-life research control amplifier U-22.
The left and right channels are completely separated electrically and mechanically. As a result, the conventional 40 to 50 dB crosstalk at 10 kHz is reduced to 90 dB or more at 10 kHz or less.
A low-impedance CR circuit is used to minimize the RIAA deviation of the equalizer circuit.
The amplifier circuit consists of a direct-coupled amplifier with DC feedback as a basic unit.
A passive CR circuit is used for the tone control circuit and equalizer circuit, which eliminates the phase disturbance in the high-frequency range and the distortion caused by the normal NF type.
It is compatible with both MM and MC cartridges by switching between Phono inputs.
An interstage capacitor with a third harmonic distortion factor of 150 dB or less is used to reduce the low-level signal distortion factor.
All components, including the equalizer, are carefully selected by a Linearity Checker of Radiometer (Denmark).
Balance control is eliminated and channel separation is improved.
It has a direct terminal that can be directly input to the equalizer circuit without passing through the selector.
The muting switch can cut the noise when the needle goes up and down.
Equipped with a peak meter.
There was a special wood case sold separately.
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Model Rating
| Type | Tube type control amplifier |
| Input / output terminal | Phono : Route 3, 47k/10k/1k Ω switchable Aux : 2 systems, 100k Ω Tuner : 1 system, 100k Ω Tape : 1 system, 100k Ω Pre out : 2 systems, 600 Ω |
| Gain | Phono:60dB Aux:20dB |
| Rated output | Pre out:1V Rec out:100mV |
| Maximum power output | Pre out : 20 Vrms or more (100k Ω termination) Rec out : 2 Vrms or more (100k Ω termination) |
| Noise (IHF-A) | Phono : 1.5 μ V or less (input conversion, input short-circuit) Aux : 20 μ V or Less (Input Conversion, Input Short Circuit) |
| Total harmonic distortion factor | 0.2% or Less (Rated Output) |
| Tone control | Bass : ± 10 dB (100 Hz) Treble : ± 10 dB (10 kHz) |
| Muting | 60 dB or more |
| Input sensitivity | Phono:1mV Aux:100mV |
| Maximum allowable input | Phono:600mVp-p Aux:6Vp-p |
| Meter indication | Rise : 10mm/sec or less Recovery : 0.3 sec or less |
| Vacuum tube used | ECC83 : 1 Piece ECC82 : 3 pcs |
| Pwer | 90 VAC ~ 115 V, 50Hz/60Hz |
| Power consumption | 100W or less |
| External dimensions | Width 480x Height 155x Depth 369 mm |
| Weight | 13kg |