RFT HMK-D210 specifications

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Brand : RFT

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General

Connections

Tech nical data

Special equipment

Other models of the same series:

Manufacturer: RFT
Model: HMK-D 210
Type: (stereo single deck)< /li>
Years of construction: no longer in series production, political change 1989/1990 in the GDR came before
Manufactured in: VEB Stern-Radio Berlin / GDR
Color:
Remote control: yes, via remote control unit HMK-F200 of the entire system
Power consumption:
Dimensions: W x H x D: 390 x 123 x 270 mm< /li>
Weight:
Factory price approx.:

List the inputs here

Sound heads: 2 (A/W combi head, extinguishing head)
Motors: 2 (Capstan, winding)
Drive: KLW 1200 (as in SK3000, SK3900, HMK-D100, HMK-D200)
Drive control: pushbuttons / microcontroller / drive with pull magnet for head carrier plate
a956e985535b8d57732d14dfa0e4c71ating speed: 4.76 cm/s
Deviation from the target speed: < 1 %
Synchronisation error: < 0.18 %
Response time of the end-of-band shutdown: < 0.1 s
Rewinding time for K60: 90 s
Band types: IEC Type I (Fe2O3), IEC Type II (CrO2)
Frequency response:
Total harmonic distortion:
Signal-to-noise ratio:
Auto-reverse: no
Track search: yes, programmable in both directions
Counter: digital, with Memory-Return
Dolby: Dolby-B compatible replica
MPX filter: yes

Further development of the well-known HMK-D200. Significant innovation:
Calibration computer for fine-tuning to the type of tape. Was originally planned with a 3-head variant, could have recorded test signals in one pass and listened to / evaluated the result. However, A/W composite head should have been imported for foreign exchange, this was omitted for the consumer devices and was only done for special industrial devices (CAW, among others for the Ministry of State Security and Deutsche Reichsbahn as a train radio logging machine). Thus, the calibration computer was realized with multiple rewinding and listening of the test recording, comparable to the Pioneer CT-447 (1991). Apparently, at least premagnetization (bias) and band sensitivity (pickup amplifier) were measured for correct operation of the compander system. The calibration circuit required an additional board ("ABE" - Automatic band calibration) in the device, the software part was already in the ROM mask of the microprocessor also installed in the HMK-D200, but is disabled in these devices.

RFT HMK-D210