EMF matching. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Civil radio communications
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While tuning several instances of the RA3AO transceiver, I encountered difficulties in tuning the EMF windings in the TX path (A18) [L] to resonance. In the author's version, the unevenness in the band of different quality and type at 500 kHz is no better than 6 dB.
When changing the circuit (Fig. 1), the unevenness decreases to 2 dB with a well-defined resonance of the EMF winding, which also reduces the attenuation in the passband.
Literature
- V. Drozdov. amateur transceivers. M., Radio and communication, 1988.
Author: V. Teteruk (YL2GL), Latvia, Lebanon; Publication: N. Bolshakov, rf.atnn.ru
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