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ELEKIT TU-8340

TUBE PUSH-PULL AMPLIFIER KIT

HIGH QUALITY DIY (DO-IT-YOURSELF) KIT

ELEKIT TU-8340

TUBE PUSH-PULL AMPLIFIER DIY KIT

PRODUCTION DISCONTINUED
THIS KIT IS NO LONGER AVAILABLE

This model of ELEKIT amplifier includes an innovative "Semi-automatic" bias adjustment
system for the tube output stage. Commonly, there are two methods of biasing a vacuum
tube amp. "Self-bias" (automatic) and "Fixed bias". For a Push-Pull amplifier - the
"Fixed bias method" is more effective and advantageous since each power tube can be
adjusted for bias. The drawback with the "Fixed bias" method is each tube needs to be
checked and adjusted for bias manually one by one.

The ELEKIT "Semi-automatic" bias adjustment system incorporates "Fixed bias method" - but with no manual steps other than a simple push of the "Auto Adjust" button. The tube bias settings are managed by a microcontroller that adjusts the tube bias in less than a minute - a very unique and innovative system that EK JAPAN is introducing into
the tube audio market.

TU-8340

TUBES

Comes with brand new JJ Electronics EL34 and ECC81 tubes

AMP MODES

Simple switching between UltraLinear or Triode mode

SEMI-AUTO BIAS

Semi-automatic BIAS adjustment by simply pushing a button

VARIOUS TUBES

You can use 6L6GC, KT66, KT88, 6551, KT90, EL34, 6CA7, KT77, KT88, KT120, KT150

CONNECTIONS PAGE FROM ASSEMBLY MANUAL

TECHNICAL SPECIFICATION
CIRCUIT CONFIGURATION Vacuum tube stereo power amplifier
OUTPUT STAGE AB Class Push-Pull, UL/Triode mode, Fixed BIAS (semi-automatic adjustment system)
VOLTAGE AMP STAGE 2 stages, Phase inversion - differential amplifier (first stages)
B-POWER MOSFET, ripple filter (for L and R separately)
STOCK TUBES Brand new JJ Electronics EL34 x 4 and ECC81 x 4
OPTIONAL TUBES KT66, KT77, KT88, KT90, KT120, KT150 series
Voltage amplification tube: ECC81/12AT7 x 4
DIMENSIONS W 450 mm x H 200 mm x D 336 mm
WEIGHT Approx. 17 kg (assembled, exc. power cord)
MAX OUTPUT
(8 Ω load, 10% THD)
Ultralinear Triode
EL34 45W + 45W 24W + 24W
6L6GC 32W + 32W 18W + 18W
KT88 42W + 42W 24W + 24W
KT150 50W + 50W 28W + 28W
FREQUENCY RESPONSE (-3 dB) 5 Hz - 120 kHz
RESIDUAL NOISE
(IHF-A, 8 Ω load)		 180 µVrms
RATED INPUT
(EL34, Ultralinear)		 460 mVrms
INPUT TERMINAL RCA jack, 1 line
OUTPUT TERMINALS Gold plated binding terminals (banana plug)
4 - 6,3 Ω, 8 - 16 Ω ,switchable)
AC POWER INPUT 3P INLET (IEC320), selectable upon assembly.
100 V, 115 V, 200 V, 230 V
AC, 50/60 Hz
POWER CONSUMPTION
No signal Max output
EL34 ~ 130W ~ 190W
KT88 ~ 140W ~ 195W
KT150 ~ 150W ~ 250W

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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