pickup cartridge การใช้

• In 1948, they began successfully producing phonograph pickup cartridges.
• They soon became standard in all but the cheapest component audio systems and are the most common type of pickup cartridge in use today.
• CD-4 sub-carriers could be played with any type stylus as long as the pickup cartridge had CD-4 frequency response.
• This was especially true after the invention of the variable reluctance magnetic pickup cartridge by General Electric in the 1940s when high quality cuts were played on well-designed audio systems.
• Modern amplifier-component manufacturers continue to label the input jack which accepts the output from a modern magnetic pickup cartridge as the " phono " input, abbreviated from " phonograph ".
• Microphones are not the only transducers subject to this effect . pickup cartridges can do the same, usually in the low frequency range below about 100 Hz, manifesting as a low rumble.
• In practice this case usually does not happen because the pickup cartridge, an inductive voltage source, need have no connection to the turntable metalwork, and so the signal ground is isolated from the chassis or protective ground at that end of the link.
• A quick search found this : Phono CER and MAG, which suggests record players may use " phono level " signals directly from the "'cer "'amic or "'mag "'netic pickup cartridge, instead of a " line level " signal.