A slope modulator for FM recording of analog data on magnetic tape

Magnetic tape has many advantages for recording analog data such as those obtained in dynamic stress analysis, geophysical, and medical work. It is also useful as a storage medium for telemetered data, and as a “memory” for analog computers. The ability to recreate the original voltage lignai is perhaps its greatest virtue, in addition to which may be lie ted its durability, ease of storage, erasability, and immunity to ambient conditions.