Ampex 601

The Ampex 601 reel-to-reel tape deck, produced from the mid-1950s through the late 1950s, is a compact, tube-based professional magnetic tape recorder. It was designed as a portable unit for high-quality monaural and later stereophonic recording, housed in a suitcase-sized Samsonite case and capable of handling ¼-inch tape on 5- or 7-inch reels.​

Key technical specifications include:

• Tape Speed: 7½ ips (inches per second) standard, with some models supporting 3¾ ips.

• Track System: Available in single-channel/full-track mono and dual-channel/half-track stereo configurations (601-2).

• Frequency Response: 40 Hz to 15 kHz ±3 dB at 7½ ips.

• Wow and Flutter: Less than 0.17% at 7½ ips, ensuring stable, clean playback.

• Signal-to-Noise Ratio: Approximately 55 dB.

• Head Composition: Three permalloy heads for record, playback, and erase functions.

• Electronics: Uses tubes including 12AU7, 12AY7, 5879, 6F5, and 5Y3 rectifiers, providing warm, analog audio characteristic of the time.

• Inputs/Outputs: High impedance microphone inputs, line inputs, and 600-ohm balanced or unbalanced line outputs.

• Controls: Mechanical and electrical interlocks preventing tape damage during operation; fast forward, rewind, stop and record functions with easy control.

• Dimensions: Approx. 8" x 14" x 16.5", weight around 26 lbs for the single-channel model.

• Power: Operates on 110-120 V AC.​

The Ampex 601 was regarded as an early portable professional reel-to-reel tape recorder, balancing compactness with high fidelity. It found use in studios and remote recording applications, favored for its durable construction and high-quality sound capture. It was succeeded by the Ampex 602, which featured enhanced electronics and stereo capabilities.​

In summary, the Ampex 601 is a historically important, tube-based portable reel-to-reel tape deck from the 1950s, valued for professional-grade recording fidelity, moderate portability, and robust build, useful in diverse recording contexts of its era.