7
OPERATION - CHASSIS AND REMOTE CONTROLS
When the power is on, the current meters on the face of the
chassis will illuminate. From this point on, the T-1500’s
operation is straight-forward. The face of the chassis has an
input selector control knob and a volume control knob (see
Figure 4. The remote control will also control the input
selections and the volume. It will not control the power to the
T-1500, which must be switched on and off manually, as
described above.
When you are finished listening, turn off your T-1500 stereo
amplifier(s) first; then, turn off your preamplifier and sources.
In the case of any failure, please contact Hammertone Audio
for assistance.
THE CURRENT METERS
The illuminated meters indicate the current supply to each of
the two 300B gain tubes in the T-1500. There is a
potentiometer for each 300B (Refer to Figure 6). When you
turn on the T-1500, the needle of the current meter for each
300B should be between the two parallel lines on the meter
face. Any error of current supply to or failure of a 300B tube
is indicated by the needle on the meter moving out from
between these two parallel lines.
If a meter’s needle drops to the left limit of the meter’s face
during operation, this indicates a failure of the related 300B
tube. You must turn off the T-1500 and replace both the fuse
(0.5A, 250V, 20mm glass type) for that 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 Hammertone Audio for assistance.
TUBES AND TUBE BIAS
The T-1500 uses the following tubes:
Two (2) x 300B
Two (2) x PCL86
Because of the individual bias for each 300B, it is not
necessary to use a matched pair in the T-1500.
You may use any 300B type tube in the T-1500, including the
newer higher voltage varieties. Of course, 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.
If the current meter for one of the unit’s 300B’s 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 that 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.
All consequences of changing or attempting to change tubes are
borne by the user unless by express agreement between the
owner and Hammertone Audio. Allnic Audio and Hammertone
Audio are not liable in any way whatsoever for any injury or loss
incurred by the user or for damage to the T-1500, any of its
parts, or tubes or replacement tubes resulting from the user
changing or attempting to change tubes.
SPECIFICATIONS FOR THE ALLNIC AUDIO T-1500 300B SET
STEREO INTEGRATED AMPLIFIER
Output Power: 12.5w + 12.5w (4, 8 or 16
Ω
load, at
1KHz)
Distortion: 0.3% at 1KHz, 2.83V
Frequency Response: 20Hz - 20KHz Flat
S/N Ratio: -80dB (CCIR, 1KHz)
Damping Factor: 10 at 8
Ω load at 1KHz
Voltage gain: +35dB
Input Impedance: 10K
Ω
(single-ended, unbalanced)
Input Sensitivity: 230mV for rated power
Tubes: 300B X 2 (power triode)
PCL86 X 2 (driver tube - equivalent
to 14GW8)
Fuses: AC Mains - 3A / 250V (110W) (two
supplied – one is a spare). Tubes -
0.5A, 250V, 20mm glass type
