Elekit TU-8500 pre amplifier DIY Kit

This is a preamp kit with a phono equalizer with features such as below;
Precision phono stage RIAA equalization (CR not NF); supports both MM and MC cartridges.
Two low noise OPamps are used in the phono equalizer amp circuitry. OPamp preference are accommodated by use of socket mounts allowing easy substitution of alternative OPamps.
Two 12AU7 (ECC82) tubes are used in the line amp stage. Gain is switchable (Approx 1x to 3x).
Reduced hum/background noise circuitry includes a low flux leakage R-core transformer, a FET ripple filter for B-power and the tubes are powered by the DC power supply.

Sufficient space has been provided on the PCB for substitution of larget coupling capacitors.
Support for 4 different voltage environments including Australia (set during assembly).
Ideal complement to TU-8200 power amp.

Stock tube: 12AU7 (ECC82) x 2pcs
OPamp: NJM2068DD x 2pcs
Input terminal: RCA jack 4 lines (PHONO, LINE 1-3)
3.5mm stereo jack 1 line (LINE3 priority)
Output terminal: RCA jack 1 line (PRE OUT)
Power voltage: AC 100V 50/60Hz IEC standard inlet
* Select from 100V, 115V, 200V, and 230V upon assembly
Power consumption: 8W
Dimensions: W252 x H73 x D270 mm (excl. projections)
Weight: Approx.3.1kg (Assembled, excl. power cord)
[Line Amp Stage]
Gain: x3.1(9.8dB) / x1.15(1.2dB)
Frequency response (-3dB): 2Hz-70kHz / 2Hz-280kHz
SN ratio (IHF-A): 122dB / 129dB
Max.output voltage: 22V rms (1kHz)
[Equalizer Amp Stage]
RIAA equalization: ±0.5dB tolerance (20Hz-20kHz)
Cartridge: MM (LOW) / MC (HIGH) switchable
Gain (1kHz): [MM] 37dB / [MC] 63dB
SN ratio (IHF-A): [MM]108dB / [MC]88dB
Input resistance: [MM] 50kΩ / [MC] 100Ω
Max.output voltage: 7.4V rms (1kHz)

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