Tube Preamp Kit TU-8500
Assembly Instruction Manual
●Contents
Caution during assembly
Necessary tools
1. Part list
2. PCB assembly
3. Body assembly
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8500-02
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Lot.No.
This is a preamp kit with a phono equalizer.
The features of this preamp include:
- Uncompromising measures taken for reduction of power supply hum
and noise. A low leakage flux R-core transformer is used for the main
power supply with a FET ripple filter and DC heater supply.
- 12AU7(ECC82) tubes mounted horizontally for slim profile. Switchable
gain of 0dB and 10dB.
- Low noise OP amp has been selected for the equalizer amp stage.
(IC socket offers easy exchange with other commercially available OP
amp ICs).
- CR equalizer circuitry is used for its renowned sound quality.
Supports both MM and MC phono cartridges.
- The power transformer supports 4 different power/voltage
environments: 100V, 115V, 200V, and 230V. (Voltage is selected at
assembly by matching the correct connector for voltage requirements).
CAUTION DURING ASSEMBLY
For your own safety, please read this “Assembly Instruction Manual” carefully before you begin assembling the preamplifier. Please follow
the instructions step by step for correct assembly and operation. Keep this manual close to hand.
Hexagonal wrench
(1.5mm)
8. Enjoy TU-8500 to the fullest
9.
Why do vacuum tubes attract audiophiles?
10. Technical data
11. Warranty
4.
Safety precautions and safety check before
and after powering up the preamplifier
5. Operation check
6. Troubleshooting
7. Connection
Necessary tools
Soldering iron
(15-30W)
Solder (for electronic parts)
(Diameter 0.8-1.2mm)
Soldering iron stand
Diagonal cutter
Long-nose pliers
Scissors
Philips screwdriver
(No.2)
Helpful tools
Nut driver
(5.5mm)
Tweezers
(For labels)
File or sand paper
Scotch tape
Multimeter
Optional voltage check
and connection check is
suggested.
*Both analog and digital
are OK.
◆Do not work near any source of water or allow any components to get wet which may cause machine failure, fire and electric shock.
Also, do not put containers with water on the work table such as vases, cups, cosmetics and drugs. Spilling water on components
may cause fire and electrical shock.
◆Be careful when handling tools, such as a soldering iron, diagonal cutter, pen knife, and other sharp tools in particular to prevent
breakage and injury. Use a pair of gloves and protective glasses according to need.
◆Some essential pieces in this kit include small and sharp objects that are made of glass or metal. Be extremely careful when handling.
◆Please discard packing waste and any waste from assembling the kit according to local standards for safety and protection of the
environment.
◆Do not work, keep or place the product near young children due to safety concerns. Children must not play with tools, plastic bags,
and electronic parts as they may cause harm. In case a child swallows a part, immediately consut with a doctor.
◆The specifications, forms and contents of this product are subject to change for improvement without prior notice.
EK JAPAN 2015
EK JAPAN CO.,LTD. Tofuro-minami 2-19-30, Dazaifu-shi, Fukuoka, 818-0105, Japan Phone: +81-92-923-8235
Website: http://www.elekit.co.jp
E-mail: info@elekit.co.jp
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