Locating Defects in Magnetic Recording Tape

Kramer A. Locating Defects in Magnetic Recording Tape. J Audio Eng Soc. 1955;3(3):143-146. Available from: https://aes.org/publications/elibrary-page/?id=15

@article{Kramer1955_15,
  author = {Kramer, Andreas},
  title = {{Locating Defects in Magnetic Recording Tape}},
  journal = {Journal of the Audio Engineering Society},
  volume = {3},
  number = {3},
  pages = {143--146},
  year = {1955},
  month = jul,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15}
}

TY  - JOUR
TI  - Locating Defects in Magnetic Recording Tape
AU  - Kramer, Andreas
T2  - Journal of the Audio Engineering Society
J2  - J. Audio Eng. Soc.
VL  - 3
IS  - 3
SP  - 143
EP  - 146
PY  - 1955
DA  - 1955/07/06
UR  - https://aes.org/publications/elibrary-page/?id=15
PB  - Audio Engineering Society
LA  - en
AB  - The use of magnetic recording tape for the more critical types of recording has made new tape-testing methods necessary. This paper describes an instrument for making instantaneous uniformity-of-response tests by locating and registering the number of individual cycles of output voltage whose amplitudes are below a pre-set level. This threshold level is the dc control voltage for an AND gate. It is set on the basis of a percentage of the ac peak voltage entering the gate so that, if the threshold control is set at 50%, the ac peak voltage must exceed 50% in order for the gate to operate. The electronic circuits, particularly the voltage-sensing circuits, are described and mechanical requirements for the tape transport mentioned.
ER  -