ALLNIC AUDIO A-5000 DHT Benutzerhandbuch - Seite 7
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THE CURRENT METER
The illuminated meter on the front of the chassis (see Figure
5 indicates the current supply to the 300B tube in the A-5000
DHT. There is a potentiometer that is used to bias the 300B
(Refer to Figure 6 for its location. When you turn on the A-
5000 DHT, the needle of the current meter should be
somewhere between the two parallel lines on the meter face.
Any error of current supply to or failure of the 300B tube is
indicated by the needle on the meter moving out from
between these two parallel lines.
If the current meter has moved to the left of the parallel lines
on the meter face, using an appropriately bladed screwdriver,
adjust the potentiometer directly in front of the tube's
location by turning it clockwise until the needle has returned
to between the meter's parallel lines. If the meter needle has
moved to the right of the parallel lines on the meter face,
turn the potentiometer control counter-clockwise to correct.
If the meter's needle drops to the left limit of the meter's
face during operation and audio output stops, this indicates a
failure of the 300B tube. The fuse will have "blown" as well.
You must turn off the A-5000 DHT and replace both the fuse
(315mA @ 250V, 20mm glass, fast blow type for the tube
and the 300B. To replace a fuse, using a screwdriver, simply
turn the top of the fuse cap counter clockwise. It will spring
out holding the fuse. Replace the fuse, push the fuse cap
down and turn it clockwise; it will lock itself. If you have any
questions about doing this, please contact Allnic Audio
USA for assistance.
You may use any 300B type tube in the A-5000 DHT, including
the newer higher voltage varieties (300BXLS, which will
operate at their optimal specification. Of course, before
changing a 300B, you should turn the bias potentiometer
down. Then when you have inserted the new tube, you will
have to adjust the bias back into the area between the two
parallel lines of the meter for a tube when it is replaced.
Please refer to Figure 6 for tube locations.
All consequences of changing or attempting to change tubes
are borne by the user unless by express agreement between
the owner and Allnic Audio USA. Allnic Audio
Allnic Audio USA are not liable in any way whatsoever for
any injury or loss incurred by the user or for damage to the
A-5000 DHT, any of its parts, or tubes or replacement
tubes resulting from the user changing or attempting to
change tubes.
SPECIFICATIONS FOR THE ALLNIC AUDIO A-5000 DHT
MONOBLOCK POWER AMPLIFIER
Output Power:
Distortion:
Frequency Response:
S/N Ratio:
Damping Factor:
Voltage gain:
Input Impedance:
Input Sensitivity:
Tubes:
AC Fuse:
Dimensions:
Weight:
and
7
10W (8Ω or 4Ω load, at 1KHz)
0.5% at 1KHz, 2.83V
20Hz - 20KHz Flat
-76dB (CCIR, 1KHz)
4.7 at 8Ω load at 1KHz
+24dB
100KΩ (single-ended, unbalanced)
0.6V for rated power
300B or 300BXLS X 1 (power
triode)
HL-2 X 1 (input tube – no
equivalent)
3A-110A x 1 (driver tube –
equivalent = WE 101FA)
5U4G x 1 (May use any octal pin
rectifying tube, e.g., GZ34).
Main: 3A @ 250V 20mm glass, fast
blow type (two supplied – one is a
spare)
300B: 315mA @ 250V, 20mm
glass, fast blow type
(W x D x H) 430mm (16.93 inches)
x 330mm (13 inches)
x 240mm (9.45 inches)
20Kg (44 lbs) net per monoblock.
21.8 Kg (48 lbs) shipping weight
per monoblock.