Studer B62

The Studer B62 is a professional open-reel tape recorder designed for mastering, broadcast, and location recording applications. It is known for its robust build quality, advanced transport mechanics, and refined tape handling features. Here is a technical overview:

Technical Overview of Studer B62

Tape Transport and Mechanics:

• Dynamic tape tension control with an advanced analog electronic servo system ensuring consistent tape tension over the full reel.

• Full roller tape path for smooth tape movement, including a scrape/flutter idler in later models to reduce tape flutter.

• Dual-stage mechanical brakes: two sets of brakes on each reel table controlling tape tension and stopping.

• Two solenoids operate the pinch roller: first brings it close to the capstan, second engages it fully for smooth operation.

• The pinch roller assembly is adjustable for vertical or horizontal machine orientation.

• Highly modular design with three cast aluminum chassis elements forming a rigid tape platform.

• Tape threading aided by carefully designed tension arms with bearings; 20 ball bearings in total contribute to smooth mechanics.

• Reel motors are AC induction motors controlled by dedicated PCBs calculating precise reel motor torque.

Electronics and Audio:

• Fully transistorized electronics with no monolithic ICs.

• Plug-in circuit boards for simple repair and maintenance.

• Shared audio electronics architecture with the Studer A80 master recorder.

• Plug-in equalizer modules allow flexibility and high-performance audio processing.

• Tape speeds selectable between 15 ips and 7.5 ips (some versions support 7.5/3.75 ips).

• Bias frequency around 150kHz compatible with high bias tapes.

• Excellent headroom and low noise.

• Fully electronic transport mode switching with relay-based logic (later versions use integrated circuits).

• Optional VU meters and audio level control panels available.

Performance:

• Wow and flutter: Approximately 0.05% at 15 ips.

• Frequency response: Roughly 30 Hz to 18 kHz at 15 ips.

• Signal-to-noise ratio: Around 61 dB.

• Crosstalk: 40 dB or better.

Physical Characteristics:

• Dimensions: Approximately 482 mm (W) × 356 mm (H) × 220 mm (D) for compact models; larger versions in floor-standing housings.

• Weight: Ranges from about 28 kg for compact versions up to approximately 74 kg in floor-standing console units.

Construction and Build:

• Strong, tank-like construction with a rigid platform for stable tape path and precision operation.

• Extensive use of ball bearings in tape guides and motors for smoothness and reliability.

• Carefully designed pinch roller engagement system to minimize tape wear and noise, with a damper to smooth movements.

Additional Features:

• Remote control capabilities for all transport functions.

• Cue mode and tape monitoring functions.

• Optional flip-up magnetic shield on reproduce head to reduce noise.

The Studer B62 is celebrated for its rugged reliability, serviceability, and high-performance audio engineering. Its mechanical design and advanced tape tension control system ensure consistent playback and recording quality, making it a favored machine for professional audio masters and broadcast engineers