TU-8500 Tube pre-amplifier 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
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.
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.
stage RIAA equalization supports MM and MC cartridges.
One phono and 3 line input connectors on back panel.
Headphone connector on front.
Stock tubes, JJ Electronics ECC82 (12AU7) x 2 pcs.
• Opamp, NJM2068DD x 2 pcs.
• Input terminal, RCA 4 lines (PHONO, LINE1 -
3), 3,5mm stereo jack (LINE3 priority)
• Output terminal, RCA 1 Line (PRE OUT)
• Power voltage, selected from 100V, 115V, 200V
and 230V upon assembly
• IEC Standard inlet
• Power consumption, 8Watt.
• Dimensions, 252 x 73 x 270 mm (exc. projections)
• Weight, 3,1Kg
• Gain, 1,15 (1,2dB) /3,1 (9,8dB)
• Frequency resonse (-3 dB), 2 Hz - 70 kHz / 2
Hz - 280 kHz
• S/N Ratio (IHF-A, ), 122 dB / 129 dB
• Max. Output Voltage, 22V Rms (1Khz)
• RIAA Equalization, +/- 0,5 dB tolerance (20
Hz - 20 kHz)
• Cartridge, MM (LOW) / MC (HIGH) switchable
• Gain (1Khz), [MM] 37 dB / [MC] 63 dB
• SN Ratio (IHF-A), [MM] 108 dB / [MC] 88 dB
• Input impedance, [MM] 50 kOhm / [MC] 100 Ohm
• Max. Output Voltage, 7,4V Rms (1Khz)
by Richard H. Mal, Mono and Stereo
greatest Bang for the Buck."
"Sonically, the TU-8500 is way beyond being just
acceptable. In gact, 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."
by Noam Bronstein, Wall of Sound.
Remember that this is a DIY kit. It means that YOU will
have to build it yourself using the assembly manual.
The kit includes all electronic and mechanical parts
(including housing) required to build a ready to work,
high quality tube amplifier. It should take 5-6 hours
to construct and it will need soldering. You should
have some tools and soldering skills. Interconnects
are not inclueded and the power cable is Japanese type,
you will need a proper cable for your country.
multimeter is not required but is really useful.
Detailed visual assembly kit instructions in Japanese
language are included in package. An English language
instruction will be send to you in pdf format after
Elekit TU-8200R + TU-8500