With [Frank Olson]’s work on a 1958 Ampex 601 tape recorder though we were pleasantly surprised, because while he makes a modification to allow its use as a stand-alone microphone preamplifier ...

Standard tape recording formats for 1/4-inch analog tape as used by the Ampex Corporation. Dimensions listed are in mils. DIGITAL RECORDING also uses magnetic tape as a storage medium, such as digital ...

Invented by Ampex in 1956, helical scan was the only method that was fast enough to record video in real time. Using two-inch tape and running at 15 ips, the going rate for tape recorders of the ...