Even in the recent past 10АС9 sound system, each sound column which contains two versatile dynamic loudspeaker (one for low and medium frequencies and the other, with a diffuser of smaller diameter for higher), it was considered perfectly acceptable for a home stereo. And electrical parameters it was on a high level: power 10 W, impedance DC current 4 ohms, audio frequency response 40 to 18,000 Hz. With the advent of so-called Hi-Fi equipment these speakers have become increasingly depart among the almost Museum pieces.
THE BRUSH DOES NOT DRY UP
If in a plastic cover for glass jars to make the appropriate hole for the handle paint brush, “kill”, as the saying goes, “two birds with one stone”: and the paint in the Bank will not dry, and brush don’t have any time to wash, she is always ready to work.
The homebrew is often used segments of rubber hose as a flexible coupling when connecting coaxial shafts, particularly in those cases where the rotation speed is small, and the shafts are not strictly coaxial. This way I decided to apply when I built the frame of the greenhouse from the chimneys of the old clamshells.
I offer a homemade device allows you to control voltage vehicle electrical system. In particular, that’s all right — the battery is charged and generates the required 12-14,8 V, the signal indicator is green light. At lower voltages the light turns yellow, and when elevated — red led.
In the repair of equipment there are times when a small detail falls into such a place, where to get it very difficult. And if a piece fell inside some mechanism? Then the continued operation is fraught with serious breakages.
THERE, ZENICA EYE. Our vision — natural stereophotography: the image of the same object on the retina varies, as each “eye” sees the object from a different angle. And only in the brain the signals from the retina from these different images are processed into one three dimensional picture.
Using copy booster of the spaceship “Soyuz” in the class of models K-2 has, along with the advantages and disadvantages. In the manufacture of models, it is difficult to meet the launch weight of 120 g. But the complexity of the design allows (high quality models) to high poster ocenku. And we decided to build the engine in the junction of the two conical surfaces of the Central unit. Thus it was possible to refuse to load the nose of the model. The inner surface of the Central unit for protection against burn-out during operation of the engine covered office silicate glue.