foil radiators. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies
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Quick and easy - to make heatsinks for transistors and microcircuits from copper or aluminum foil 0,1-0,3 mm thick. The plates are cut with scissors, carefully assembled into a bag up to 3 mm thick, clamped between two fairly rigid boards and holes are drilled. Before assembly, the plates are trimmed in the thermal contact zone and cleaned with micronized sandpaper in order to ensure their tightest fit. And after the plates are assembled, their ends are spread throughout the free zone.
Figure 1 shows a heatsink for a KT81SA type transistor with a bracket.
Rice. 1. Radiator for the transistor: 1 - plate, 2 - bracket, 3 - KT815A transistor
The radiator for the K174UN7 chip installed on the circuit board is shown in Figure 2.
Rice. 2. Radiator for the microcircuit: 1 - plate, 2 - bottom plate, 3 - microcircuit, 4 - heat sink, 5 - board
A set of bottom plates 3 mm thick must be oriented so as to exclude contact with the microcircuit pins. Moreover, the assembly of the radiator should be performed before soldering the IC leads.
Author: A.Fischev
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