. Various Shure-M61 preamp free download

File name Shure-M61 preamp.pdf

DATA SHEET MODEL M61 SERIES TRANSISTOR STEREO PREAMPLIFIERS General: The Shure M61 Series Transistor Preampli- fiers are designed to furnish the voltage gain and equal- ization necessary to operate magnetic phono cartridges (such as the Shure Dynetic Cartridges) and tape playback heads with standard audio amplifiers. One of the primary uses of the M61 is in conversion of Stereo systems from ceramic cartridges to magnetic cartridges. It can also be used without circuit modification as a preamplifier for microphones. Advantages include complete freedom from microphonics, extremely low noise, the use of 50 feet or more of output cable in "phono" and "tape" positions, and years of maintenance-tree performance. The operat- ing temperature range is from 32