Open Reel Tape Machine M 063 H3
Analog High End Tape Recorder with 1/4″ Bandwidth
- ¼“ stereo with 2,oo mm track width
- Reel size up to 27 cm
- Belt drive capstan motor
- 2 speeds switchable from 9.5 cm / s to 38 cm / s
- 2 speed spooling
- real-time counter in time format hrs / min / sec, 100 / sec
- Edit function manually one-handed
- Inputs adjustable via level control
- Unbalanced outputs with studio level 1,55 V
- Surfaces in black or silver anodized
- Side panels in black frosted or walnut
The M 063 H3 has all the features needed to make high-quality recordings and playback at two speeds. The otherwise optionally available wooden side parts and the levelling feet for vertical operation are also part of the delivery.+ Options and Accessories
- High end headphone amplifier for headphones with impedances from 16 – 2000 ohms
- Hour meter
- Folding handles for side panels
In order to meet a broad range of applications, the M 063 H5 chassis has been developed for professional applications and consists of high-strength aluminium. In addition, the wearing surfaces of the base platter are finely milled on both sides, ensuring that the angles and height of the mechanical elements of the tape transport are precise and lasting. The head block and audio heads are so precisely machined that there is no need for a time-consuming and inexact adjustment of the tape heads. The reel motors, capstan motor, power supply and audio unit components are so positioned as to keep the signal flows short, while failure-critical components are spatially separated from each other. This enables substantial measures to electromagnetically shield the components – particularly the motors and tape heads – to be avoided from the outset. All components and circuit boards are equipped with high-quality plug-in connectors on both sides. Longer cables and signal lines are grouped in a sealed cable harness with magnetic shielding. This allows servicing of all components to be performed with the minimum of delay, without having to change the position of adjacent cables or components.
The processor-based drive control prevents any kind of looping and tape deformation. The braking process from the spooling operation thus ensues completely electrically incorporating the sensitive tape tension sensors. You can select between two tachometer-controlled spooling speeds plus optional archive winding function with increased counterbalancing. For this purpose, extremely torque-invariable motors have been developed with state-of-the-art power electronics and direct drive. Even at high load, these fast-reacting servomotors generate hardly any waste heat, and operate virtually silently while developing an extremely high and uniform torque with their axial magnetic field. Two highly precise force sensors on the guide rollers monitor the tape tension and set the current for the reel motors without any delay. This enables both an extremely uniform tape-head contact and an extremely low slippage at the pressure roller, combined with low pressure strength.
The basic version of the M 063 H3 is equipped with a belt-driven capstan shaft. Here an extremely quiet and smooth-running, brushless DC motor with block commutation is used. The vibration behaviour known from belt-drives is efficiently prevented by constructive measures, such as an extremely short and wide belt. In addition, the position of the speed sensor for the set rotation speed is also a major factor: it has been arranged in such a way that the control loop is as short as possible. In relation to noise generation and synchronisation values, this belt drive is in no way inferior to the direct drive. The motor thus possesses outstanding acceleration and deceleration values and can be in standby mode. For a smooth start that is gentle on the tape, first the pressure roller is engaged, then the motor accelerated – using precisely calculated ramp control – and stabilised without overshooting. This occurs in less than 0.5 seconds – even at a speed of 38 cm/s, and then the audio channels are activated. The speed control of the capstan motor is realised by means of the phase lock loop (PLL) method, a process with decades of proven performance behind it. Here a so-called phase comparator synchronises the frequency of the capstan shaft tachometer generator (in the microsecond range) with an externally supplied reference value. In contrast to the well-tried PLL regulation, the M 063 capstan motor, however, operates with a digital loop filter and process-controlled regulator. Only in this way was it possible to realise an extremely precise and fast-reacting direct drive with a very low wow & flutter.
The class-leading modern audio electronics consist of a plug-in card system with very short signal paths. Playback / recording electronics and erase oscillator are powered by separate precision power supplies. The use of toroidal transformers and the spatial separation of audio and power electronics ensures a high unweighted signal-to-noise ratio, which is far above studio standard. This allows the playback head to be without mechanically shields.
The front panel can be move along with the audio unit. Thus, work, such as measuring on other types of tape or replacing individual amplifier cards, can be carried out from both sides. In addition, the ad-justment controls on the amplifier cards are arranged in such a way that they are both accessible from the front, as well as from the rear. If the machine is mounted in a rack or console, it does not need to be removed for calibration. It is sufficient to remove the front panel.