EK JAPAN CO., LTD
15th Anniversary of Foundation
日本ELEKIT成立15週年
Limited Model / NOV
2009
* 參考資料 : 日本KIT
SET定價為88,200日元、砌機收費26,250日元，需時30日，不包括運費。
限量成品，即日接受預定，2009年11月份推出。TU-875 / 879 / 882AS
/ 884CD / 881CD 等已登記行貨用家優先發貨。
TU-8300
300B SINGLE STEREO POWER
AMPLIFIER“TU-LAB”
A
single stereo power amplifier with 300B tubes, the most popular tube, which is
designed so that tube amplifier fans can work over it on their own after
assembly.
Find your favorite combination of tubes, output transformers (OPT), volumes,
etc, and enjoy this experimental TU-LAB!
300B 單端真空管立體聲放大器
全球首部300B同時兼容KT88(6550)、KT66、 EL34(6CA7)、6L6GC等真空管，自動偏壓，無需開機蓋。
Experimental
amplifier for audiophiles !!
Triode connection of pentode
also available!
Triode-connected pentode and beam tube have equal qualification and
attraction as 300B. 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” , that 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 malfuction.
[FET ripple filer]
FET ripple filter, time-proven in the performance of the reduction of ham
noise is adopted for the B power supply.
[All tubes heated by AC]
From ecological 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
Upon request for se under 200V environment or oversea countries, a multi
power transformer that 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.)
【Specifications】
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 sensitibity:
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 used.)
Input terminal :
Gold-plated RCA jack, single stereo line (at the
back)
Power input :
3P inlet (IEC320)
Power voltage :
220V ~ 240V 50/60Hz 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)
OPTs (Output
Transformers):
