Revox F36

The Revox F36 is a classic Swiss-made reel to reel tape recorder from the early 1960s, prized for its build quality, all-tube electronics, and semi-professional capabilities. Here is a detailed technical overview:

Core Technical Specifications

• Track Format: Available in both half-track (2-track) and quarter-track (4-track) stereo configurations.

• Tape Speeds: 3¾ and 7½ inches per second (ips).

• Max Reel Size: Handles reels up to 10.5" (26.5cm).

• Frequency Response:
  7½ ips: 40Hz–15kHz
  3¾ ips: 40Hz–12kHz

• Wow and Flutter: ±0.1% at 7½ ips.

• Signal-to-Noise Ratio: Better than 50dB.

• Playback/Record Heads: 3 heads, Permalloy composition, stereo configuration.

• Motors: 3 motors for reliable tape transport and smooth winding.

• Auto Reverse: No.

• Voltage: 110–120V, 220–240V, multi-voltage compatible.

• Outputs: RCA connections.

• Dimension (W x H x D): 18.1 x 11 x 13.4 in. (460 x 280 x 340mm)

• Weight: Approx. 42.9 lbs (19.5kg)

• Output Power: 6W amplifier, internal loudspeaker (Ø 21cm)

• Tube Complement: 13 tubes—ECC81 x5, ECC83 x4, ECC82 x1, ECL86 x2, EMM801 x1.

Mechanical and Electronic Design

• Construction: Robust professional chassis suitable for horizontal or vertical operation.

• Tape Path: Precision-guided, heavy-duty solenoid pinch roller, and mechanical brakes electrically released by solenoid.

• Transport Controls: Push-button operated with automatic function clearing and end-of-tape shutoff.

• Metering: Unique EMM801 graduated twin-beam "magic eye" level indicator—allows both channels to be monitored simultaneously with very fast response, a rare feature for its era.

Features and User Functions

• Recording: Full stereo or mono recording and playback; options for mixing, echo, and multiple recording techniques.

• Reliability: Highly regarded for build quality and long-term reliability—serves both enthusiast and semi-pro needs.

• Special Capabilities: Quick rewind (about 80 seconds for a full 2,400ft reel); three-digit tape counter with illuminated resetting knob.

• International Model: The F36 was designed with improved international usability (as opposed to the E36).

Design Notes

• Valves/Tubes: The F36 reverted to an all-tube (valve) design after the hybrid (tube plus semiconductor) E36 variant.

• Legacy: The F36 was succeeded by the G36, which brought more modern meters and other enhancements but kept the core amplifier design largely unchanged.

The Revox F36 stands out for its robust all-tube electronics, smooth three-motor transport, and advanced ease-of-use features for the era—making it a staple for both home audiophiles and semi-professional recording environments.