144 MHz direct conversion receiver. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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144 MHz direct conversion receiver. 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 receiver is designed to operate in the range of 144-146 MHz. The circuits operating at frequencies above 100 MHz have a somewhat unusual appearance. These are quarter-wave resonators shortened by capacitance, curved to reduce dimensions. The design of the contours is clear from Fig.2.

Fig.1 (click to enlarge)

The receiver was mounted on patches according to S. Zhutyaev's method. Instead of the transistors indicated in the diagram, domestic ones can be used: BF194 - KT368, GT311, VS179 - KT3102A.

144 MHz direct conversion receiver. Pay
Ris.2

Literature

1. "Radioelektronik" 4, 1984

Publication: N. Bolshakov, rf.atnn.ru

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Comments on the article:

Jury
There would be more such schemes for radio amateurs

Eduard
Where can I read about shortened quarter-wave resonators and how to make them in practice?

Sashko
Such resonators can be printed. Will they work?

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