Comments on the article
For amateur radio measurements, you can use the heterodyne resonance indicator shown in the figure.
In the circuit, you can use transistors such as KP303 (VT1) and KT361 (VT2), diodes KD514.
The inductor data depends on the selected range. The original used a set of 6 circuits mounted on three-pin connectors.
Literature
- Elektronisches Jarbuch 1988, p.169
Publication: N. Bolshakov, rf.atnn.ru
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