LUXKIT A3034

Commentary

Control amplifier kit with CL34 kit.

Although it is a tube type, it has a duo-beta circuit.

The equalizer circuit is a 3-stage direct connection structure without using an interstage coupling capacitor, and S. R. P. P. is used for the output stage.
The S. R. P. P. operates to compensate for non-linear operation and has various advantages such as excellent linearity, high output voltage, and extremely low output impedance.
To this amplifier circuit, we have added an appropriate amount of NFB to improve the middle and high frequency range and DC servo to improve the low frequency range (damping) to create an excellent equalizer amplifier.

The flat amplifier section is a 2-stage differential amplifier circuit that theoretically does not generate even order distortion, has a simple configuration with tone control in the NFB loop, and achieves excellent frequency characteristics of 3 Hz to 70 kHz by eliminating the interstage coupling capacitor.
The NFB amount is set to an optimal value.

Equipped with a DC configuration headphone amplifier.

It is equipped with functions such as tone control, subsonic filter, low-cut filter, attenuator, signal off switch, tone defeat switch and muting.

Model Rating

Type	Tube type control amplifier kit
Output voltage	Rating : 2 v Maximum : 10 V
Total harmonic distortion factor	0.008% (20 Hz to 20 kHz at 2 v output)
Frequency characteristic	3 Hz to 70 kHz - within 1 dB
Input sensitivity	Phono1, 2 : 2 mV Tuner, Aux : 170 mv
Input impedance	Phono1, 2 : 50k Ω Tuner, Aux : 70k Ω
Signal-to-noise ratio (IHF-A)	Phono1, 2 : 80 dB Tuner, Aux : 100 dB
Allowable input	300 mv (Phono, 1 khz, RMS)
RIAA deviation	± 3 dB
Output impedance	Pre out : 560 Ω Rec out : 680 Ω
Tone control	Treble : ± 8 dB, Turnover 3 kHz Bass : ± 8 dB, turnover 300 Hz
Attachment	Filters (subsonic, defeat, low cut) Two tape monitors Tape Dubbing (1 → 2, 2 → 1) Attenuator (-20dB, normal, signal off) Headphone jack 2 AC outlets (total max600W)
Vacuum tube used	12AX7:4 12AU7:4
Power consumption	60W (Electrical Appliance and Material Control Law)
External dimensions	Width 438x Height 77x Depth 322 mm
Weight	6.4kg