The crystal detector was soon replaced by the thermionic value and had largely become obsolete by 1939 . 晶体检波器不久即被热电子管所代替,到1939年已大部分变成了废物。
2.
Galena crystals detectors 方铅晶体检波器
3.
Crystal detector tester 晶体检波器试验器
4.
The attenuators and the sensitivity of detectors are calibrated in varied frequencies . the attenuation of the cable is also calibrated 对晶体检波器在不同频率下的矿灵敏度进行了测定;对同轴信号线的衰减量瓣行了标定。