Fast and simple — to manufacture heat sinks for transistors and microcircuits made of copper or aluminum foil with a thickness of 0.1—0.3 mm. Plates are cut with scissors, carefully collected in a package with a thickness of 3 mm, clamped between two fairly tough boards and drill holes. Prior to Assembly of the plate trimmed in the area of thermal contact and smooth out the micron sandpaper to ensure their tight fit. And after the plates are assembled, their ends are bred throughout the free zone.
THE RADIATOR FOIL
In the December issue of “M-K” for 1990 were published material about the switch-gubbare. There is proposed a technical solution I liked, but… think about it, has developed its own version. In order to turn on the light of the two points, sometimes enough to modify the normal switch. It is necessary to disassemble and install a third contact plate. This is done quite simply.
My burner — ejector for high temperature soldering. Running from the LPG cylinder. It is economical: the number supplied to the gas ejector can be adjusted. The burner is arranged in the following way. From the gearbox or gate valve on the cylinder gas is fed through the hose to the inlet tube built into the base of the burner. From there it flows through the vertical channel of the rack in the Central bore of the body of the jet, where the amount dosed adjusting needle mounted on the threads of the housing cover. Further, the gas supplied to the nozzle and ejected through the hole.
With the magazine “modelist-Konstruktor” sign not the first year. Mainly as a diligent reader and a little less like a homebrew, trying in conditions of simple home workshop to put into practice some of the promoted ideas and solutions. Now offer one of their own developments. Its essence is in the equipment standard plug led indicator. Upgraded fork gives you the ability to visually monitor a current flow in the load. When specified in the schema the values of the total capacity of devices connected to the plug-signalling device shall not exceed 500 watts. Well, if the load is solid, will have to replace the placed in the fork diodes КД208А to the semiconductor counterparts with higher energy parameters.
Homemade welding machines are engaged not the first year. In their manufacture into account the advice and recommendations of the “Model construction” and other well-established technical publications and reference literature. Started with “Welding baby” (No. 11, ’87), using the Latr ready with the primary winding. For secondary — recommended magazine, Shino-wire not found. Dare to wind the desired number of turns of the flexible stranded wire 6 mm2 in vinyl insulation. And what? Of course, such a device quickly overheated even when welding of cellular electrode. To somehow solve the problem associated with cooling, have decided to omit the “svarochnik”… in the water. Came from the fact that the secondary winding is great for insulation. And primary, which went before the slider wasn’t exposed as proactively managed to cover it in several layers of protective varnish.
It would seem that can be the total electric drill hole puncher, washing rubber (eraser) and a paper clip? But O. Lavrov, who considers himself a graduate of our magazine, was able not only to see it shared, but make stationery to work successfully in a number of original technical solutions. As a result of normal (and battered) drill inquiring of homebrew has expanded its typical “drill-tocil-wide” function. Now she can, if necessary, and tighten screws to Unscrew, and if you really itch — even a jigsaw or hacksaw would work tolerably well. All you need is the right tooling (this material is not considered).
Thank you so much, friend magazine, for the development of welding transformers. Inspired by the publications took a chance and made themselves compact, but quite powerful “svarochnik” based on “on the margins” of the burnt stator from a induction motor. Now that dream is about as good design of the rectifier… help me out, dear journal. On you one hope!
Industry now available good double wire with PVC insulation, which occupies when winding on the bobbin a little space. So there is no need to do cumbersome carrying, about which the magazine wrote some time ago. However, the idea Tihonovich from Kharkov (“modelist-Konstruktor” No. 10 of 1985) good. So I decided to develop it further, making the appropriate changes.
Happened that my electric “Rossiyanka-2” went out on one of the switches controls the degree of heating burners. So much so that no restoration is not subject. A suitable replacement for him even in a repair shop not found. Rescued… the thermostat of the burnt iron. However, had a bit to accommodate this, tuscawilla in storage, site.