Improvement of the UW3DI transceiver. Scheme, description

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Improvement of the UW3DI transceiver. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Civil radio communications

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To improve efficiency and convenience when operating in CW mode, it is advisable to reduce the delay time of the VOX system in the UW3D1 tube-semiconductor transceiver compared to SSB mode.

UW3DI Transceiver Improvement

To do this, in CW mode, an additional resistor is connected in parallel with the resistor 1-R4. The changes that need to be introduced into the VOX of the transceiver (see Yu. Kudryavtsev. Tube-semiconductor transceiver. - "Radio", 1974, No. 4) are marked in the figure with dashed lines.

Author: A. Zhukovsky (UB5UWI), Kyiv; Publication: N. Bolshakov, rf.atnn.ru

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