American CAT SL-1 circuit bile preamp circuit board, tube preamplifier board, AC filament power supply. sweet toneCAT can be said to be a standard tuning technique, using three different types of vacuum tubes on the entire circuit, with a total of four bipolar transistors
Manage. First level utilization of 12AU7, taking its high bandwidth and sweet tone direction. The second level is even more exciting, using a high magnification tube 12A
X7's SRPP has created an incredibly wide bandwidth and dynamic performance for the entire line. Afterwards, use 6DJ8 for output to achieve extremely low output
Impedance and driving force can be fully matched with various post stages without any matching issues.
[Material Description]
Standard electronic tubes: 1 *ECC82, 2 *ECC83, 1* Beijing 6N11-J,
power supply uses electronic tubes: Shuguang 2pcs 6Z5P is connected in parallel.
You can also upgrade imported electronic tubes by yourself, and the effect will generally have different levels of improvement.
The signal level coupling capacitor adopts German wIMA MKP Dong copper foot thin film capacitor in parallel with high-quality domestic Jianghai antique copper head ceramic tube
Oil immersed capacitor. The end output capacitor adopts Swedish R | FA+Jianghai oil immersion+Hong Kong TE, with high sound intensity, not loose, and an open sound field
Wide, resilient and elastic, all frequency bands are quite balanced.
The high voltage section is rectified in parallel with two Shuguang 6z5P rectifiers, and then passed through a 20H choke coil (optional) and four 150UF rectifiers
Japanese Chemical Industry
After filtering with a low internal resistance capacitor, it is led to the anode of the tube. The current is already very flat, there is no need to blindly increase the capacitance, as it will affect the high frequency
Performance. The small capacity high-voltage capacitor adopts NICHICON from Japan, and all filaments are powered by AC, which has a more musical flavor because the board passes through
Optimized design, even with communication, the noise floor is only 2MV.
Most resistors use 5-ring copper alloy precision metal film resistors, which are stable and reliable, with lower thermal noise than carbon film.
Copper silver plated ceramic electronic tube socket, high temperature resistant! Upgrading the gold-plated socket will cost an additional 20 yuan.
PCB size: 232.7MM * 246MM, with a tube height of 7.8CM and connected to 5MM columns.
【 Wiring diagram, high voltage can be used between 250-270V, higher voltage, slightly wider sound field 】
Excerpt from a HIFI buyers:
Speaking of the bile predecessor,
many people think that the sound is sweet and golden. In the "contest"
with a prince who sold more than 7,000 yuan of gallbladders last year,
the golden color that filled the whole house once caused someone to
stand up and applaud: the guts are different! Yes, the charm of guts has
conquered countless enthusiasts, but what kind of "guts" is beautiful, I
believe many people are confused, even out of the guts, simply say:
guts are good! In fact, what's so good about a beautiful amplifier? Here
I would like to talk about a famous fever machine: American CONVERGENT
AUDIO TECHNOLOGY (CAT for short) SL-1 ULTIMATE version of bile preamp.
Due to my work relationship, I have
had many contacts with this machine, and I have grooved it. When I heard
her, I already felt that it was quite a pure voice-its voice has its
own unique interpretation , Not only has the intimate atmosphere of
ordinary amplifier, but also contains high-tone tone with fine texture.
Her deep analytical skills and sense of energy and power of notes can't
help but inspire! From this, I think that a good amplifier should have a
very high analytical power that can clearly show the contour details of
a continuous sound image (high analytical power is not to give people a
dry voice that only exposes the details Sense, but to describe the
light and dark levels of the music in a very delicate sense of hearing),
but also to easily and smoothly convey the mood of the music, making
people feel that there is a just alcohol and sense, but also full
frequency Stretching force, huge dynamics, and large sound field ensure
that a harmonious and transparent wide space can be easily restored.
Therefore, a good "bold voice" is
not only rich and hazy golden yellow, but also has better transparency,
sufficient analysis and resolution of small details, CAT designer -KEN
STEVENS made A good interpretation, its new "bile sound" concept, not
only affected the latecomers, but also made the modern tube machine
sound orientation mostly develop in this regard.
