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本文所讨论的收发信机是两年多研制和设计工作的总结。目的是提供一台能在2米(144～146MHz)覆盖范围内调谐,并能单边带调频和以10～20瓦的峰值包迹功率输出连续波工作的收发信机。为了避免一些人们认为困难的晶体变换和通带滤波器的调整,作者决定制造第一个单边带10MHz调频接收机。采用低成本及容易获得的阻塞(block)晶体滤波器。这部收发机在三年内几乎天天使用,因而给作者以充分的机会对本设计进行可靠性、操作简便、长期稳定等方面的考验。本机制造费用低于200英磅。收发机的主要要求如下:一次变频以改善接收机的交叉调制和阻塞特性,而且结构简单
The transceiver discussed in this article is a summary of more than two years of development and design work. The purpose is to provide a transceiver that can be tuned over a 2-meter (144-146 MHz) range, with single sideband frequency modulation and CW output with peak envelope power of 10-20 watts. In order to avoid some people think that the difficulty of the crystal transformation and passband filter adjustment, the authors decided to create the first single-sideband 10MHz FM receiver. Low cost and easy to get block crystal filter. The transceiver is used almost daily for three years, giving the author ample opportunity to test the reliability, ease of operation and long-term stability of the design. The machine cost less than 200 pounds. Transceiver's main requirements are as follows: A frequency conversion to improve the receiver's cross modulation and blocking characteristics, and the structure is simple