Monday, May 16, 2016

High Power 2 x 50W Tube Amplifier with Antique FU13 (813) Tubes

High Power 2 x 50W Tube Amplifier with Antique FU13 (813) Tubes

Tube FU13 (Shuguang 813) belong to antique one, which is a direct thermal beam shot tetrode with thorium tungsten cathode, graphite anode. In the radio equipment, it can be used for the oscillator power amplifier tubes, and its using frequencies are up to 30MC. When it is used as a power amplifier (such as Class AB), its output power is up to 300W or above, it is high reliable, excellent linearity, and not only does it perform tigers’ roaring and thunder exhaustive, but also can perform thin piano voice with detailed and delicate, it is the master of tube amplifier.

FU13 sound is very good, power and life are outstanding, air sense and sound field is far better than with that cannot be compared, you may not want to listen to small power output tube after listeningFU13.It is the first choice to drive low-sensitivity, high-power and high-end speaker.

There is the tube amplifier with tubes FU13.It is a mono-block integrated tube amplifier with 2 x 50W high output power, which is made of pure tubes, adopt 2pcs 12AT7 plus  2pcs 6N8P to drive 2pcs FU13, and its recrifier adopt tube 5Z4P.

 2 x 50W Tube Amplifier with Antique FU13 (813) Tubes

 2 x 50W Tube Amplifier with Antique FU13 (813) Tubes




1. Adopt 2pcs 12AT7 + 2pcs 6N8P as driving amplifier;
2. Adopt 2pcs FU13 as power amplifier;
3. Adopt 1pc 5Z4P as rectifier;
4. RCA signal terminal as high-grade gold-plated, thick gold-plated for 4 ohms / 8 ohms output terminal;
5. Power transformer and output transformer using imported high-sic sheet, high-purity oxygen-free copper wire layer and section production;
6. Volume knob using Japan ALPS type 27 of blue shell;
7. Coupling capacity using MIT of USA.

Product Specifications

1. Rated output power: 50W + 50 W
2. Frequency response: 20Hz – 20kHz
3. S/N ratio: ≥90dB
4. Impedance: 4Ω / 8Ω
5. THD: ≤1% (@1K Hz)
6. Power voltage: 110v or 220v
7. Net wet: 26kg
8. Dimension(L * D * H):455mm * 290mm * 230mm
9. Tubes:
   12AT7 x 2, 6N8P x 2, FU13 x 2, 5Z4P x 1.
10. Accessories:
   Power Cord x 1

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