Full recordShow full item record
AbstractSome investigation are made on the following characteristics of transisterized IC and vacuum tube amplifiers used at Wakayama Micro-earthquake Observatory, i.e., (1) temperature dependence of sensitivity characteristics and (2) secular variations of frequency response characteristics. It can be pointed out that the characteristics of the amplifiers are stable enough for practical use of routine observation for 2 years or so within the reading error limit of visible seismogram.
TypeDepartmental Bulletin Paper
地震研究所研究速報. 第10号第6冊, 1973-03, pp. 1-5