Both the board and the case. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies
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A situation familiar to many radio amateurs: another circuit has been assembled, tuned, but ... I don’t want to squeeze it into some kind of “soapbox”, and there is neither time nor energy to create a suitable frame for the “diamond”. I had to look for a way out of similar situations. It turns out that enterprising and savvy Siberians have launched the production of elegant souvenir boxes made of foil materials, usually used in the production of printed circuit boards. Moreover, according to the simplest technology: on the blank-sweep, in the places of future folds (from the side of the base-insulator), cuts were made, and after giving it a box shape, foil joints were soldered.
But after all, the cases of most amateur radio designs are essentially the same souvenir boxes (except that they are larger and designed for other contents). Then why not take the advice of the magazine and develop a technique for making a good frame for amateur radio designs.
The statement of this problem was soon followed by its solution. I hope it will be acceptable for other amateur designers. After all, the cases made according to the proposed method turn out to be of good quality. The strength, elegance, moisture and heat resistance inherent in the material of the base-insulator (and this is textolite, getinax or fiberglass), are successfully complemented by the valuable properties of the conductive layer (foil), including the ability to serve as an excellent electrostatic screen. In addition, the manufacture of such a body takes only an hour - an hour and a half (of which about 70 percent of the time is spent on soldering the seams).
The proposed technology is not complex. And so that even a schoolboy who makes the first amateur radio design in his life can understand and apply it, it is presented in the form of pictograms.
The manufacture of the body begins with the fact that from a sheet of foil material (having, for example, a glass-textolite base), blanks of the bottom, cover, sidewalls, front and rear panels are cut out. Their dimensions depend on the dimensions of the created amateur radio structure. If you need a body with a width x, length y and height r, and the thickness of the source material (including the foil layer) is s, then the blanks must be the same as shown in the "zero" illustration (pos.0). According to the general plan, holes are made in them for terminals, buttons, electrical measuring instruments, etc.
Pictograms revealing the manufacturing technology of the case from foil material of printed circuit boards (click to enlarge)
Then the foil edges of the blanks are tinned. On the front panel, located with the insulator base down, the sidewalls are placed alternately and soldered to it at a right angle. Turning the resulting bench-like structure by 180 °, solder the back panel (pos. 1).
Four triangular joints are cut out of foil fiberglass. Holes with a diameter of 5 mm are drilled in each, they are bored with a flat file to hexagons - seats for M3 nuts, which are immediately pressed in with a vice or pliers (pos. 2-5).
Sequential installation (pos. 6), soldering the resulting cover fastening elements into place also lead to an increase in structural rigidity.
Having attached the cover to the almost finished box, from the side of the pressed-in nuts, holes for the M3 screws (pos. 7) are marked. Drilling is performed by clamping the cover in a vise.
The last stage of soldering is the installation of the bottom in its place (pos. 8). The electronic "stuffing" is placed in the almost completed case and the cover is fixed with screws (pos. 9). And, as they say, even to the exhibition!
Author: O.Sidorovich
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