Another wonderful design from Mr Fujita - TU-8550
You can view and listen TU-8550 PREAMPLIFER in the coming -
Tube Preamp Kit TU-8550
PRICE : $1,175.00
JJ 12AX7 X 4
JJ 12AU7 X 2
[Circuit configurations, stock tubes]
Flat amp (line amp) : 2x 12AX7, 1x 12AU7, SE input/output
Phono equalizer amp : 2x 12AX7, 1x 12AU7, CR type, RIAA equalizer amp
A-power : DC-power (all tubes)
B-power : MOSFET, slow start, constant voltage power
* Line AMP *
Unbalanced output, continuously variable gain
[Max. output voltage] (1kHz)
Over 30V rms (Volume at the max.)
[Max. gain] (Volume at the max.)
Approx. 17dB (approx. 7 times)
[Frequency response] (-3dB, 47kΩ load) 5Hz to 200kHz
[Residual noise] (IHF-A)
15μV (Volume at the max.)
6.5μV (Volume at the middle)
4.3μV (Volume at the min.)
[SN ratio (IHF-A)]
130dB (Volume at the middle)
126dB (Volume at the max.)
* Equalizer amp *
[Max. output voltage] (1kHz) 20V rms (1kHz)
[Gain (1kHz)] 29dB
[SN ratio(IHF-A)] 112dB
[RIAA equalization] Within ±0.5dB (20Hz to 20kHz)
[Input resistance] 47kΩ
* General *
[Input/output terminal / Input and output impedance]
PHONO IN：RCA jack, for MM cartridge, 47kΩ
LINE IN： 4 lines
LINE 1, 2, 3 : RCA jack, over 50kΩ)
LINE 4 : 3.5mm stereo phone jack (front), approx.12kΩ)
PRE OUT：RCA jack, 2 lines (parallel output), approx.1.1kΩ
REC OUT：RCA jack, 1 line, approx.2.4kΩ for PHONO
Output impedance of the sound source + 1kΩfor LINE IN
[Power voltage] AC 100V 50/60Hz
(For overseas, 115V(110 –120V) or 230V(220 –240V), 50/60Hz)
IEC standard, 3P inlet type
[Rated power consumption] 23W
[Dimensions] W352 x H66 x D298 mm (including projections)
[Weight] Approx.4.0kg (Assembled, excluding AC cord)
4X VCAP 0.47 CuTF (option )
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