Super regenerative receiver at 144 MHz. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Super regenerative receiver at 144 MHz. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / radio reception

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The super-regenerative receiver circuit shown below can operate as part of a simple 144 MHz portable radio. The scheme is quite simple and has no features. The sensitivity of the receiver is about 10 ... 15 μV.

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Coil L1 contains 3 turns of "silver" with a diameter of 0,8 mm, frameless - on a mandrel with a diameter of 6 mm, winding length 4 mm. Dr1 - standard 25 µH. Dr2 - contains 250 turns of PEV 0,1 wire on an H1000 ferrite ring with a diameter of 8 mm. Transformer Tr - output from a transistor radio, if high-resistance telephones are used, then it is not needed. It is desirable to use modern transistors.

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