It is known that if two are going to swap, say, apples, then in the end they will still be an Apple. Well, if these two will exchange ideas, then each will have two ideas… This idea is incorporated in the letter of our reader A. K. Kartseva from Yasinovataya, Donetsk region. About Aleksey Konstantinovich making models of ships and acquired this most interesting case a lot of experience. He offers readers a six technological and design tips and at the same time encourages modelers to share their experiences.
In electronic equipment with high density have more difficulties to get to various units and parts when setting up or replacing them during the renovation. Therefore, in the serial devices are widely used in various moving joints of construction elements. However, in Amateur conditions is not always possible to produce such compounds.
In the “M-K” No. 8 for the year 1991 was published an article devoted to the technology of processing of shells for cylinder-piston pairs of current model engines. Judging by the numerous reader responses, this topic is highly relevant and widely recognized. Therefore, in addition to already published material, we offer a number of tips that will allow Amateur and professionals made the crossing of the micro-motors to reach the heights of excellence in their field.
“Development, published in the journal “modelist-Konstruktor”, make ourselves photoelectron shooting. Works flawlessly. It is a pity that the sounds in the scheme is not provided. Help!”. The fraction of machine-gun fire, screeching min, heavy bass bombs… Simulates a similar sound picture of the fight is pretty simple device, made only three transistors.
Love to collect basic and necessary household appliances. One of them is the homemade probe, which is designed not only for “continuity” of the electrical circuits in the range of 5-300 In, but also to determine the type, polarity, electric current, measure the voltage from 5 to 60 V — stand on the court readers of the respected journal. The basis of the device is a transistor analogue of the thyristor, addressed at length in “Modelis-the-designer” №1, 1999. 
Sometimes even reliable drill goes down. Statistics show that failures occur not so much in its mechanical, how many electrical parts. But if tips on restoration of cable, replacement of worn brushes, bad switch or the elimination of other simple malfunctions of home appliances posted a lot, including in the pages of “Modeller-designer” (see for example, № 9’95,6’96,2’97), what about more complex kinds of repair are not. In particular, there is a clear lack of material about the peculiarities of maintenance and feasible (in terms of home Studio) fixation of the rotor manifold of the engine, usually installed in the drills, wrenches and other manual tools.
It is known that the temperature of the soldering iron depends largely on the quality of the performed installation. Are particularly bad (if not harmful) to overheat. Immediately deteriorating the quality of the soldering, there is a risk of peeling the printed wire Board, is accelerated wear of the operating rod, and even failure of the heating element. Sting often cleaned of oxides and overheated — not holding solder.