813 (FU-13) Vacuum Tube Amplifier Classical Diagram Circiut

 813 (FU-13) Vacuum Tube Amplifier Classical Diagram Circuit

Vacuum tube 813 belongs 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.



813 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 listening tube 813. Due to its high power output, it can drive high power speakers that tube amplifier with lower output can't drive. It is the first choice to drive low-sensitivity, high-power and high-end speaker.

There are 813 (FU-13) Tube Amplifier Classical Diagram Circuits, only for your information.

More details, please find https://www.iwistao.com/products/vacuum-tube-813-shuguang-for-tube-amplifier-replace-fu13-high-power-output-quality-hifi-audio?_pos=1&_sid=d8f007fee&_ss=r

How to customize drilling the holes of your speaker cabinet

How to customize drilling the holes of your speaker cabinet

Sometime, we need drill the holes be suitable for the speaker cabinet, like as a through hole, and a countersunk hole, then you may fix your speaker unit into the cabinet. 

We use a machine to do them, come on, take a look that how it works. Also there are many empty speaker cabinets for your DIY, including full range speaker cabinets, 2 ways, 3 ways, and labyrinth, inverted, and so on. You only select that one is suitable for you, then fix it into the cabinet, connect your power amplifier to enjoy your favorite songs... 

More details, please find the link https://www.iwistao.com/collections/empty-woodem-cabinets

Same 4 inches full range speaker unit for different speaker cabinet.

Same 4 inches full range speaker unit for different speaker cabinet, they are all 

Labyrinth Structure from IWISTAO  speaker.

IWISTAO Single-ended Tube Amplifier 2X3.5W Class A 6N1 Drive 6P14 5Z4P Rectifier Scaffolding Soldering Solid Wood Casing

IWISTAO Single-ended Tube Amplifier 2X3.5W Class A 6N1 Drive 6P14 5Z4P Rectifier Scaffolding Soldering Solid Wood Casing AC115/220V

The  song  is Bury The Heart, from CD Player + IWISTAO P14 Single-ended Tube Amplifier + 4 inch Full Range Solid Wood Speaker .

Here, 6p14 is a commonly power output vacuum tube in the previous tube radios, with a gorgeous sound and mellow sound! Savor carefully, nostalgic thoughts emerge spontaneously. This unit is suitable for high-sensitivity small bookshelf speakers, and also very suitable for using as desktop audio and upgrade computer audio.
Since the tubes of all levels are working in Class A amplification, the distortion is small, its tone is sweet and soft.Its rated output power is 2x3.5w, but the actual undistorted output power is equivalent to 2x20w transistor power amplifier because the tube has the advantage of strong overload capability,


The casing is made of Sapele solid wood, which is medium-hardness wood that maintains original color and texture of the wood. The case is coated with environmentally friendly varnish and polished and painted many times. The texture is rich, simple and beautiful! The upper and lower top plates are painted iron plates. The advantage of using iron top and bottom plates relative to aluminum plates is that they can isolate some clutter interference. Flat proportional size, solid and steady, restrained in atmosphere. There is still space inside the casing, you can replace a larger oil-immersed capacitor, or it is convenient to rub the circuit!

More details, please find here below.

https://www.iwistao.com/collections/single-ended-tube-amp/products/iwistao-single-ended-tube-amplifier-2x3-5w-class-a-6n1-drive-6p14-5z4p-rectifier-scaffolding-soldering-solid-wood-case-115-220v?variant=31987631784051 https://www.iwistao.com/collections/hifi-speakers/products/iwistao-hifi-4-inch-full-range-speaker-solid-wood-1-pair-60w-4ohms-60hz-23khz-92db-max-akisui4-for-monitor-speakers-tube-amp https://www.iwistao.com/collections/cd-player/products/hifi-cd-player-with-dac-cs4398-192khz-24bit-high-quality-movement-upgrade-version-black-or-withe-panel-220v-audio

Don't decorate your dreams from FU50 single-end tube amplifier

Don't decorate your dreams from Terence Tsoi

Foobar2000 player Win 10 + FU50 single-end tube amplifier + HIFI 2awy Speaker.

 

Advantages of single-ended class A tube amp are that sound is pure and delicate, high-frequency extension of natural human voice, strings are very attractive, especially in triode connection was the most prominent. Because the operating point is selected on the linear characteristic curve segment, nonlinear distortion is relatively small, even harmonic content is high, but also very good sound effects, sound quality is beautiful moist, sweet and pleasant, like as the taste of multi-harp. The unit adopts tube FU50 also called small 300B as power stage, natural and smooth, mellow voice, has a very strong tube taste with expectations.

Designed with a switch for 5 signal inputs, they are MM phono, CD / DVD drive, USB decoder, AUX line, MP3/PC. And designed independence channel to exclude interference between different inputs to ensure no matter what audio input, the unit will not be impacted by other audio input and sound. And you can choose the different signal source according to individual needs.