Homemade radiators for semiconductor devices. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Homemade radiators for semiconductor devices. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

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Homemade radiators have two advantages:

a. made from improvised materials, they cost nothing;

b. their dimensions can be precisely entered into the available space of the device.

1. The radiator is assembled from copper U-shaped strips 0,3-1 mm thick. I often used ready-made copper tape 20 mm wide, cutting the desired pieces with scissors. Having collected the package, with a given surface area, I tie it with a harsh thread, moisten it with LTI-120 flux and solder it. With this flux, the solder is pulled into all the cracks even without prior tinning! It is important that the soldering iron (or two) is powerful enough. I process the ends with a file and sandpaper, solder a 1,5 mm wire for installation on the board. I drill and cut threads for the transistor. The radiator is obtained with a variable cross section, which is favorable for a uniform distribution of heat flows.

2. For a needle radiator, I use a brass base 1,5-2 mm thick. I bend, cut the thread for fastening, tin the surface for the needles. From a bare copper bundle with a diameter of 1,5 mm, I cut the same pieces 20-50 mm long, for a given area. With the help of a conductor, from 20 mm textolite with a large number of holes, I collect, on a horizontally lying base, all the needles. I warm up the entire package with LTI-120 flux and an excess amount of solder. For heating, you can use a gas or electric stove. Semiconductor devices are placed on the opposite side of the needles. It is still better to use such radiators in stationary equipment, because of their decent weight (copper is still the same). I would not recommend using them in car circuits - they are not suitable for shaking.

Homemade radiators for semiconductor devices. Copper plate heatsink

Homemade radiators for semiconductor devices. needle radiator

Publication: shustikov.by.ru

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