Tetrode

Tetrode type many common are: beam Tetrode, straight hot shot Tetrode and breed Tetrode etc. Tetrode, tone is thick, it has the characteristics such as velocity sense.moreover, in fact, the real significance Tetrode just in the history of tubes as validation tube appeared without into practical, this is another topic not to say it, below said front mention currently in commodities in more than half of the amplifier model with the thing - beam shoot Tetrode.

Beam shoot tube structure characteristics

Beam Tetrode several structure features shot:

1. The cathode for elliptic, increasing the cathode effective launch area, thus increasing the amount ReDianZi launch.

2 and 5 extremely tube, as in inhibiting grid anode and added with shade between grid, the function before that.

3. In the shade screens and between anode and add a couple bow metal plates (one of the key, pay attention to the following statement), this is cluster screen.

Cluster screen

Cluster screen in the tube, and the cathode connected with cathode equipotential namely, it forces have across shade screens stream along the bow only metal plates to opening in the direction of bundles shape into the anode. Ok, let's review the definition of junior knowledge is current flows: unit time unit cross-sectional area stream. Here as electron stream into a bundle shape injection when density will surely increase, so the anode current such by clever increased. This is Tetrode in keeping the shoot beam and other power tube volume difference premise, can form than other power tube larger anode current key.

grid

Tetrode have two grid, a and the grid function as transistor (called control grid or grid 1), another (called shade gate or grid 2) is used to decrease control grid and metal plate capacitors between.

Beam Tetrode technology application shot

Rich far Andrew bogut series BY - KT88

KT88 is very good bundle shoot. Tetrode Tone is thick, it has velocity sense.moreover, unique and beautiful, workmanship, accurate grasp of her characteristics have been my company r&d efforts of one of the items.

Google - KT88 circuit design is play in KT88 sound field momentum of atmospheric and speed, and using this circuit structure on the set the machine from the input stage begins to establish good follow sex audio source, thus make the machine in music tension on the expression of more can make KT88 of beam shooting prowess, extraordinary performance, while the output transformer in certain parameters design USES a large quantity, the low inductance distributed capacitance and limited volume and so on measures to make the can very good cooperation KT88 complete sound situation.

BY KT88 in appearance on - bold selection with Europe wooden high desktop structure, and the surface of the copper anaglyph, full-bodied amorous feelings of medieval filling the machine, are the only one electron tubes amplifier see knowledges.

Technical index:

Output power: 70W + 70W (RMS)

Signal-to-noise ratio: 89db

Frequency response: 10Hz - 68KHz (1db) -

Distortion: acuities 0.75% respectively

Vacuum tube type: 6N1 x 4, KT88 x 4

Our MB750 VTL

VTL is the old-line bile machine factory, MB750 VTL our name is its top products. This machine is at the end of each track level with 12 only 6550C power tube output, in four tube connection can output 750W, under three-grade tube connects under have 300W amazing power output, it can be said to be leading the same level of type, is also the author trip to listen to one of the two bile duct amplifier. The machine adopts unique two layer structure, will power circuit of the part and audio amplifier circuit splits are above, below is the power supply parts. When power output of its maximum power consumption for 130 kW, the efficiency is very high.

Due to the output power is quite large, so it sounds of a surprising, whole frequency domain appeared very natural unified feeling, and other power amplifier performance is different. It in play orchestral exhibit excellent sense when HouRun, wind, and tone of softness is admirable, but piano touch the keys insufficient alertness slightly too, but whether music level or in the voice of the elastic echo has a very rare texture. Putting in the string sound when appear very sleek, distinct level is exquisite, sound outside to expand slightly, surrounded by a listener, piano is very vivid, headnotes telecast sleek fluent, is not feeling the strain. However, if the outline of the instrument can be clearer line that is more perfect.

This machine appearance looks very masculine powerful, yet timbre is beyond imagination to wash practice, performance is very gentle perfect. It three-grade tube connection voice more gentle and gentler, while in level 4 tube connection voice more powerful. On the whole, its sound doctrine natural and warm, with excellent dynamic performance is good, sound simple sense, in the warm voice contained in energy. Use it drives various efficiency of speakers are appear leisurely and deep with extraordinary glamour.

Our VTLMB750 will sell for about 17 million hk dollar, its each channel output to 750W (Tetrode connection) and 300W (tertiary tube connection), the last stage 6550C bile duct, promote the use level for 12AT7 * 1, 6350 x 2. This machine power with the main body of the vocal separate, each weighing machine 57kg.

Straight hot Tetrode

Shaped like charger, and like a light bulb, should be a kind of auxiliary audio-visual kind of things (actually, I did not find much material).

Breed Tetrode

It is 23 manifolds mixed application of another says. No detailed introduction.