Elekit TU-8340 Push-Pull DIY Tube Amp Kit
Tube sets for this kit can be ordered below.
The TU-8340 tube amplifier implements a new semi-automatic bias adjustment system. You can set the bias by simply pressing the button.
Another great feature is a Ultralinear to Triode selection switch. This switch changes the mode of the output tube circuit between these two options.
When tube rolling is not enough, some folks also like to upgrade audio coupling capacitors. The PC board provides a large foot print allowing the ampm builder to install almost any boutique caps they wish.
The power transformer is fully universal allowing the Elekit TU-8340 to be used virtually anywhere in the world. Just choose the appropriate options for your country (100V, 115V, 200V, and 230V) during assembly.
The high voltage power supply employs power MOSFET as ripple filters, keeping hum and noise floor to a minimum, improving overall audio quality.
(Tubes are not included)
EL34 (UL) : 460mV (Triode) : 360mV
|EL34 (UL) :180μV (IHF-A)|
|LINE x 1|
|SP output terminal (4-6.3Ω, 8-16Ω) Gold-plated terminal (Banana plug usable)|
|AC100V 50/60Hz (3P inlet)|
|EL34||130W (no signal)||190W (Max. output)|
|KT88||140W (no signal)||195W (Max. output)|
|KT150||150W (no signal)||250W (Max. output)|
|W450 x H200 x D336mm (incl.projections)|
Approx, 17kg (incl. cover, excl. power cord)
Additional Information and Downloads
How to adjust the bias1. When using new tubes or tubes are exchanged, press “SAFETYRESET” button right after the power ON. The cathode current of the output tubes are brought to the minimum position - safe statuts - and it becomes stand-by status.
2. After the tubes fully warm up, press “START ADJUST” button. Then the bias current is automatically adjusted. This adjustment is stored in the nonvolatile memory. Therefore, even though the output tubes are exchanged and the power is turned ON, the error indication appears until “SAFETY RESET” button is pressed.
Amplifier Review by Wall of Sound
Elekit (EK Japan Co. LTD) has been producing electronics kits since the early 1970's. While their main focus has always been educational kits, more recently they started to offer hifi audio amplifier kits. Included are some fantastic DIY vacuum tube amps and headphone amplifiers.
Since this is an electronic product that is assembled by the user, we cannot provide a warranty like those found for regular pre-assembled electronics. Instead, Elekit can provide a counseling service. If there is a problem in the product please contact ELEKIT. However, throughout the instruction manual there are many check points, and we kindly ask you to make sure to pay attention to those check points as most of the time your problem can be solved if you follow them closely. We can not accept returns of any kit that has been started. EK JAPAN CO., LTD Tofuro-minami 2-19-30, Dazaifu-shi, Fukuoka, 818-0105 Japan Phone: +81-92-923-8235 Fax: +81-92-923-8237 Website: http://www.elekit.co.jp Email: firstname.lastname@example.org tab)
If you receive a tube that does not perform to the manufacturer's specifications, please do the following:
- contact us to get a return authorization
- return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.
Returns not related to warranty or defect will be considered at our discretion, and are subject to a 15% restocking fee.
We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly.
These guidelines may be updated without notice.