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长风牌CF-2型十二晶体管三波段交流台式收音机是上海华丰无线电厂的产品,它供收听中、短波调幅广播用。整机采用超外差式及硅、锗晶体管混合线路,有良好的电、声性能。功率放大级采用OTL线路,有高、低音音调控制器,机箱大小配合适宜,低音丰满浑厚,高音清晰嘹亮,有很高的保真度。机后装有拾音器及外接扬声器插孔,可外接声源及大口径扬声器。本机有大于6瓦的不失真输出功率,如配合适当的助音箱,可获得极佳的音响效果。在1979年第七届全国收音机评比中,本机获得同类产品中的一等奖。主要技术性能频率范围:中波525～1605千赫短波_1 3.9～8.5兆赫短波_2 8.5～18兆赫灵敏度(信噪比为20分贝时):
Changfeng brand CF-2-type 12-transistor three-band AC desktop radio Shanghai Huafeng radio factory for listening to the shortwave AM broadcast. The machine uses superheterodyne and silicon, germanium transistor hybrid circuit, a good electrical and acoustic performance. Power amplifier stage using OTL lines, a high, bass tone controller, the size of the chassis with the appropriate bass plump, loud and clear treble, with high fidelity. After the machine equipped with pickups and external speaker jacks, external sound sources and large-diameter speakers. The machine has more than 6 watts of undistorted output power, such as with the appropriate help speaker, get excellent sound effects. In 1979 the Seventh National Radio Awards, the machine won the first prize in similar products. Main technical performance Frequency range: Medium wave 525 ~ 1605 kHz Short wave _1 3.9 ~ 8.5 MHz Short wave _2 8.5 ~ 18 MHz Sensitivity (signal to noise ratio of 20 dB):