Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Vendor's Bazaar Commercial Vendors large & small hawking their wares

Elekit TU-8300
Elekit TU-8300
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 1st November 2009, 04:52 AM   #1
vkung is offline vkung  Canada
diyAudio Member
Join Date: May 2005
Location: Vancouver BC Canada
Default Elekit TU-8300

TU-8300 stereo power amplifier with 300B tubes, the most popular tube, is designed with many flexibilities. Tube lovers can use his favourite combination of tubes, output transformers (OPT), volumes, etc and enjoy this experimental TU-LAB!
Click the image to open in full size.
Assembly example (with 300B tubes)

Click the image to open in full size.
Included parts for assembly

Click the image to open in full size.
Assembly example (wit KT-88 tubes)

Triode connection of pentode also available!Triode-connected pentode and beam tube have equal qualification and attraction as300B. In this TU-LAB, 8 pin sockets are equipped, which enables triode connection of such tubes as KT88(6550), KT66, EL34(6CA7), 6L6GC, etc, without any modifications to the amplifier.   

Try different OPT and volumes!
A slide universal bracket, or in other words “magical bracket” (which enables various kinds of OPTs in various shapes to be installed) is developed for TU-LAB so that most of commercially-available OPTs for 300B single amplifier can be used.

Full of ingenuity for high quality sound, stability, safety, and energy-saving
[“Constant current circuit, self-bias + fixed bias” method]
Constant current circuit is adopted instead of cathode resistors of self-bias method so that a constant plate current flows no matter what tubes in our assumption are used. (rated currency value can be fine-adjusted).
[Power shut-down circuit for OPT upon over-current]
If over-current occurs in either of the OPTs even for one second, the B power supply is shut down and LED indicator at the troubled side shows that there took place a malfunction.

[FET ripple filer]
FET ripple filter, time-proven in the performance of the reduction of hum noise is adopted for the B power supply.

[All tubes heated by AC]
From a conservation point of view, all tubes are heated by AC power so that the power loss in the rectifying circuit is improved and heating is moderated.

World-wide power transformer
A multi power transformer can be used under 4 different power voltage environments, such as 100V, 115V, 200V, and 230V (Select the setting location of the corresponding connector upon assembly.)

●Tubes:300Bx2, 12AT7x2 (No tubes for replacement included)
●Max. output: 8W+8W (by default, with 300B tubes and 8Ω of load applied)
●Frequency response(-3dB): 15Hz~40kHz
●Residual noise (IEC filtering): 0.5mV (0.1,V when KT88 installed)
●Input sensitivity: 200mV  ●DF:6.3  ●Speaker: 4~16Ω
●Output terminal : Gold-plated, binding post
(bare wires up to Φ5mm can be inserted, and banana plugs can also be
●Input terminal : Gold-plated RCA jack, single stereo line (at the back)
●Power input : 3P inlet (IEC320)
●Power voltage : 100V AC 50/60Hz
(115V, 200V, and 230V are also available. Change the soldering location
of the connector for power transformer as shown in the photo below.)
●Power consumption: 80W by standard (70W~95W as ip is fine-adjustable.)
●Dimension: W400xH213xD250 mm
(Chassis with the punched metal cover, protrusion not included.)
●Weight: 10.8kg (fully assembled, without a power cable)
●ip adjustment range: Approx. 50~80mA (L,R independently adjusted)
●Ham balancer function equipped
●A microcomputer is adopted for TU-LAB, for the first time to our TU series
amplifier (warming-up timer <delay in B power supply>, cathode voltage
monitoring, automatic shut down of B power supply upon malfunction)

【Tools required for assembly】
Soldering iron (15~30W), Solder, Soldering iron stand,
Philips screwdriver (#2), Diagonal cutter, Long-nose pliers, Allen wrench (1.5mm), Penknife, Scissors

For inquiries :vk-music
Webesite : VKMusic.ca Home page
E-mail : info@vkmusic.ca

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
  Reply With Quote


Elekit TU-8300Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hitachi HMA-8300 amp... Don_de_marco Analogue Source 3 19th June 2011 12:55 AM
Hitachi HMA-8300 bosedtobosed Solid State 5 19th June 2011 12:17 AM
Elekit TU-8300 vkung Elekit 4 20th March 2010 02:27 AM
Elekit TU-870 help chrish Tubes / Valves 5 10th June 2008 04:20 AM
Elekit TU-870 rjm Tubes / Valves 1 10th June 2005 01:15 AM

New To Site? Need Help?

All times are GMT. The time now is 06:23 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio