NAGRA 4.2 Reel to Reel 7" Professional Tape 3 Head Vintage 1971 WORK Good Look

NAGRA 4.2 Reel to Reel 7" Professional Tape 3 Head Vintage 1971 WORK Good Look

Working PERFECT on 100/120/220/240 volts Good Look

NAGRA 4.2 – Technical Specifications (English)

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General Description

• Portable, mono, full‑track 6.35 mm (¼”) analogue audio tape recorder, designed for professional radio, cinema and television applications. 

Tape Speeds

• 38 cm/s (15 ips)

• 19 cm/s (7½ ips)

• 9.5 cm/s (3¾ ips)

• NAB or CCIR equalization selectable.  

Heads & Transport

• Three‑head design: erase head + separate record/playback heads for real‑time “confidence” monitoring.

• Head material: Permalloy, full‑track mono.  

Inputs

• Microphone (×2): internal preamps switchable Dynamic (0.2 mV/Pa), T‑power or Phantom 48 V (1.5 mV/Pa)

• Line input: voltage or current mode via QCE cable

• Mixer input: direct mixer feed for external mixer sources  

Outputs & Monitoring

• Balanced line output: 4.4 V or 1.55 V (600 Ω) depending on transformer installed

• Built‑in speaker: switchable Source/Tape monitoring

• Modulometer & quartz reference generator: for on‑site calibration

• Alarm indicator: power‑fail or transport‑fail warning 

Signal Processing

• Switchable high‑pass filters (record/playback)

• Switchable automatic level control (ALC) and limiter 

Performance

• Frequency response (±2 dB):

• 15 ips – 30 Hz to 20 kHz

• 7½ ips – 30 Hz to 15 kHz

• 3¾ ips – 30 Hz to 10 kHz 

• Wow & flutter:

• 15 ips – 0.05 %

• 7½ ips – 0.07 %

• 3¾ ips – 0.15 % 

• Signal‑to‑noise ratio:

• 15 ips – 71 dB

• 7½ ips – 68 dB 

• Speed tolerance: ≤ 0.05 %

• Harmonic distortion: 1 % at maximum level

• Rewind speed: 600 ft/min 

Power & Options

• Power: internal batteries or external supply ATN‑4

• Optional: NEOPILOT 50/60 Hz sync system; QGB extension for 10.5″ reels; SMPTE timecode upgrade (1980s) 

Physical Characteristics

• Dimensions: 317.5 × 222 × 108 mm (12½ × 8¾ × 4¼ in)

• Weight: ≈ 5.2 kg (11.5 lb) 

Production Details

• Manufacturer: Kudelski S.A., Switzerland

• Production years: 1971 – 1975