LUXMAN PZ24
¥ 38,500 (released in October 1965)
Commentary
This control amplifier was developed with the aim of a more advanced reproducing device based on the experience of preamplifiers such as the popular transistor preamp PZ12 and the bulb type preamp PZ21 for professionals and the technology acquired through the development of the premain amplifier.
The vacuum tube is a highly reliable low-noise tube carefully selected from the 12AX7.
DC ignition system is adopted for the heater in all stages, and B power supply is double-wave rectification by silicon diode.
The input circuit is Phono2 series, the Tape Head can be adjusted to NARTB standard 9.5 cm and 19 cm, and the AUX connector is Aux 2 series with level set on one side.
The equalizer stage uses an NF type with less distortion.
The impedance of the output circuit is set to 1.2k Ω, which is sufficiently reduced by applying a large amount of NFB, and is also difficult to be induced by hum.
The tone control is an NF type unique to, and a total of six types of frequency switching devices have been added.
It is also possible to obtain flat characteristics by installing a defeat device.
Equipped with a high-cut filter using a coil, noise such as scratch noise can be cut.
The LC method is adopted to give steep characteristics.
Equipped with a loudness control device.
It is equipped with a blend control that mixes the left and right signals of the stereo. You can use this function to continuously adjust the sound spread from stereo to monaural.
The L + R signal is also available when you play monaural with a stereo cartridge.
It is equipped with a tape monitor and recording / re-connector.
.JPG)
Model Rating
| Type | Tube type control amplifier | ||||
| Frequency characteristic | 20 Hz to 20,000 kHz ± 1 dB | ||||
| Distortion factor | Within 0.1% (Output 1 V, 1 kHz) | ||||
| Input Sensitivity / Impedance | Phono1, 2 : 2.8mV/100k Ω Tape (9.5 cm) : 1.8mV/100k Ω Tape (19 cm) : 2.1mV/100k Ω AUX1 : 230mV/1M Ω AUX2 : 230 mV (with Level Set) / 1M Ω |
||||
| Output impedance | 1.2k Ω | ||||
| S/N ratio (output 1 V) | Phono1, 2 : 62 dB or more Tape (9.5cm/19cm) : 55 dB or more AUX1, 2 : 60 dB or more |
||||
| Tone control | LUX System NF Type (with Frequency Switching) 150 Hz, 300 Hz, 600 Hz, 1.5 kHz, 3 kHz, 6 kHz, Defeat |
||||
| Equalizer | Phono:RIAA Tape(9.5cm/19cm):NARTB |
||||
| Filter | Low Cut : 100 Hz, 6dB/oct. High Cut : 5 kHz, 9dB/oct. |
||||
| Attachment | Tape monitor DIN connector Loudness control Presence control AC outlet (Route 3) |
||||
| Semiconductors used |
|
||||
| External dimensions | Width 363x Height 127x Depth 235 mm | ||||
| Weight | 7.6kg |