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ELEKIT TU-8500

TUBE PRE-AMPLIFIER KIT WITH PHONO EQUALIZER

HIGH QUALITY DIY (DO-IT-YOURSELF) KIT

ELEKIT TU-8500

TUBE PRE-AMPLIFIER DIY KIT WITH PHONO EQUALIZER

This is a preamp DIY kit with a phono equalizer and a lot of great features. Precision phono stage RIAA equalization (CR not NF) supports both MM and MC cartridges. Two low noise OPAMPS (NJM2068DD) 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 larger coupling capacitors. Support for 4 different voltage environments including Australia (set during assembly). Ideal complement to TU-8200 power amp.

TU-8500 / TU-8200

TUBES / OPAMPS

Comes with ECC82 (12AU7) tubes and low noise opamps NJM2068DD

CARTRIDGES

Phono stage RIAA equalization supports MM and MC cartridges

SWITCHABLE GAIN

Total gain of preamp is switchable from approx 1x to 3x

HEADPHONES

One phono and 3 line input connectors on back panel. Headphone connector on front

TU-8500 Connections

TECHNICAL SPECIFICATION
STOCK TUBES JJ Electronics ECC82 (12AU7) x 2 pcs.
OP-AMP NJM2068DD x 2 pcs.
INPUT TERMINAL RCA Jack 4 lines (PHONO, LINE1 - 3)
3,5 mm stereo jack 1 line (LINE3 priority)
OUTPUT TERMINAL RCA Jack 1 Line (PRE OUT)
POWER VOLTAGE AC 100V 50/60Hz, IEC Standard inlet
Selected from 100V, 115V, 200V and 230V upon assembly
POWER CONSUMPTION 8 W
DIMENSIONS W 252 mm x H 73 mm x D 270 mm (exc. projections)
WEIGHT Approx. 3,1 kg (assembled, exc. power cord)
LINE AMP STAGE
- GAIN x 3,1 (9,8 dB) / x 1,15 (1,2 dB)
- FREQUENCY RESPONSE (-3 dB) 2 Hz - 70 kHz / 2 Hz - 280 kHz
- S/N RATIO (IHF-A) 122 dB / 129 dB
- MAX. OUTPUT VOLTAGE 22 V RMS (1 kHz)
EQUALIZER AMP STAGE
- RIAA EQUALIZATION +/- 0,5 dB tolerance (20 Hz - 20 kHz)
- CARTRIDGE MM (LOW) / MC (HIGH) switchable
- GAIN (1 kHz) [MM] 37 dB / [MC] 63 dB
- SN RATIO (IHF-A) [MM] 108 dB / [MC] 88 dB
- INPUT RESISTANCE [MM] 50 kOhm / [MC] 100 Ohm
- MAX. OUTPUT VOLTAGE 7,4 V RMS (1 kHz)

TU-8500 REVIEWS

Great fun with construction should be ended with a great listening. Look what the people which heard it says about.
  • THE GREATEST BANG FOR THE BUCK - ELEKIT TU-8500 REVIEW
    Sonically, the TU-8500 is way beyond being just acceptable. In fact, I have a hard time finding anything which performs nearly as good as the TU-8500 even in the $2000 dollar range. It completely annihilated my $600 dollar DIY Marantz 7 replica in both frequency extension and dynamic contrast.
    Richard H. Mak - Senior Analog Contributing writer | Mono and Stereo High-End Audio Magazine

DIY - DO IT YOURSELF

Please remember that this is a DIY kit. It means that YOU will have to build it yourself using assembly manual. The kit includes all electronic and mechanical parts (including tubes and housing) required to build a ready to work, high quality tube preamplifier. It should take 4-5 hours to construct and it will need soldering. You should have some tools and soldering skills. There is not included interconnects and the power cable is Japanese type, you will need a proper cable for your country.

TOOLS REQUIRED

Although building this kit is not hard, you will need some skills and tools. A multimeter is not required but can be useful.

  • Phillips screwdriver
  • Diagonal cutter
  • Longnose pliers
  • Scissors
  • Scotch tape
  • Hexagonal wrench
  • Soldering iron

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