前段时间,父母亲过生日,想买一台能“静噪”的便携式短波收音机。但笔者转遍了西安的电器市场,也未找到一款合适的产品。老人喜欢听广播,使用的是一台八十年代初日本产夏牌收录机。该机性能良好,特别是收音灵敏度高,具有“静噪”功能,即调谐电台过程中,无台时即静噪。作为电子爱好者, Some time ago, parents birthday, want to buy a “silent” portable HF radio. However, I turned around the electrical market in Xi’an, did not find a suitable product. The elderly love to listen to the radio, using a Japanese-made summer card deck from the early 1980s. The aircraft performance is good, especially high sensitivity radio, with “mute” function, that is, tuning the radio process, no station when the mute. As an electronics enthusiast,