Willen
Well-Known Member
Heared that resistors and transistors cause noises in high impedance amplifiers. Here, I can buy few values of resistors in very cheap (comparatively to USA etc) like I can get 1000 pieces at just $3 (for regular customer as a whole sale). I can get 1000 BC547B transistors at just $2. ( But almost no more parts than this available, except few. )
Due to its cheap rate, resistors' color bands and transistors case finishing looks little rough (comparatively to USA and etc). These cheap parts from India. So I am thinking that these also have less quality material inside it for sale in low price. Due to the low quality, do any resistor and transistor cause noises? Any engineer studied to choose high quality resistors and transistor? How they make 'low noise' parts like BC549? (sorry for long story)
Due to its cheap rate, resistors' color bands and transistors case finishing looks little rough (comparatively to USA and etc). These cheap parts from India. So I am thinking that these also have less quality material inside it for sale in low price. Due to the low quality, do any resistor and transistor cause noises? Any engineer studied to choose high quality resistors and transistor? How they make 'low noise' parts like BC549? (sorry for long story)