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A stereo tube preamplifier based on 6K4 tubes. It allows you to change the volume, adjust the bass and treble, and give a "sweet" color to the sound characteristic of devices with vacuum tubes. The parameters are regulated by means of three potentiometers located in the front part of the housing. The preamplifier allows you to connect two audio input channels via RCA connectors and outputs in the form of active speakers or an amplifier with passive speakers. It is powered with the voltage of 12 V and can consume up to 1 A.

Due to the standard sockets, the user can replace the 6K4 tubes with others, e.g. 6J1, 6J2, 6J4, GE5654 or 6AK5, to modify the preamplifier operating parameters. The electronic module was placed in a nice, aluminum housing. The FX-AUDIO Tube-03 is a good choice for both novice users and audiophiles.
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A stereo tube preamplifier based on 6K4 tubes. Designed for use with active speakers or an additional amplifier and passive speakers. SUCA-AUDIO TUBE-T1
Raspberry computer case: Pi 3 model B +, Pi 3 model B, Pi 2 model B and Pi 1 model B + in red color from metal
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UDOO-NEO FULL is a single board computer with a dual-core ARM processor (Cortex-A9 and Cortex-M4 in one system), 1 GB of RAM, Linux, Bluetooth 4.0, Wi-Fi, IMU
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UDOO-NEO EXTENDED is a single-board computer with a dual-core ARM processor (Cortex-A9 and Cortex-M4 in one system), 1 GB of RAM, Linux, Bluetooth 4.0, Wi-Fi, and IMU.
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UDOO-NEO BASIC is a single board computer with a dual-core ARM processor (Cortex-A9 and Cortex-M4 in one system), 512 MB RAM, Linux system, Wi-Fi.
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Printed circuit board for a miniature buffer power supply with an "ideal" diode. AVT1910 A
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AVT kit for self-assembly of a 5V miniature module. AVT1913 / 5 B
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Assembled miniature 5V power supply module. AVT1913 / 5 C
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AVT kit for self-assembly of a miniature 9V power module. AVT1913 / 9 B
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Assembled module of a miniature 9V power supply. AVT1913 / 9 C
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PCB board for miniature module power supply 5V, 9V, 12V, 15V, 24V. AVT1913 A
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AVT kit for self-assembly of a miniature 12V power supply module. AVT1913 / 12 B
No product available!
Assembled module of a miniature 12V power supply. AVT1913 / 12 C
No product available!
AVT kit for self-assembly of a miniature 24V power supply module. AVT1913 / 24 B
No product available!
Assembled module of a miniature 24V power supply. AVT1913 / 24 C
No product available!
PCBs and a programmed system for the construction of radar using ultrasonic waves. AVT5550 A +
No product available!
Black plastic wheels designed specifically for use with FEETECH FS90R micro continuous rotation servos. The wheels have silicone tires and measure 60 mm (2.36″) in diameter. Two additional mounting holes for 4-40 screws make it possible to use the wheel with several of our universal mounting hubs. The wheels sold in pairs. Pololu 2819
No product available!
A stereo tube preamplifier based on 6K4 tubes. Designed for use with active speakers or an additional amplifier and passive speakers. FX-AUDIO Tube-03