RFT HMK-D210

Data[edit]

General

Manufacturer: RFT
Model: HMK-D 210
Type: (Stereo single deck)
Years of manufacture: no longer in series, political turn 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 overall system.
Power consumption:
Dimensions: W x H x D: 390 x 123 x 270 mm.
Weight:
New price approx:

Connections

Technical data

sound heads: 2 (A/W-combi head, erase head)
motors: 2 (capstan, winder)
Drive: KLW 1200 (as in SK3000, SK3900, HMK-D100, HMK-D200)
Drive control: Jog keys / microcontroller / drive with pull magnet for headstock plate
Operating speed: 4.76 cm/s
Deviation from target speed: < 1 %
Synchronization error: < 0.18 %
Response time of the end-of-line switch-off: < 0.1 s
Rewind time for K60: 90 s
Tape types: IEC Type I (Fe2O3), IEC Type II (CrO2).
Frequency response:
Distortion factor:
Signal-to-noise ratio:
Auto reverse: no
Title search: yes, programmable in both directions
Counter: digital, with memory return
Dolby: Dolby-B compatible replica
MPX filter: yes

Special Features

Further development of the well-known HMK-D200. Essential innovation:
Calibration computer for fine tuning to tape type. Was originally planned with a 3-head variant, could have recorded there in one run test signals and listen to / evaluate the result. A/W composite head would have had to be imported for foreign exchange, this was omitted for the consumer devices and only for special industrial devices (CAW, among other things for Ministry for State Security and German Reichsbahn as train radio logging machine). Thus, the calibration computer was realized with multiple rewinding and listening to the test recording, comparable to the Pioneer CT-447 (1991). At least pre-magnetization (bias) and band sensitivity (pickup amplifier) were apparently calibrated for correct operation of the compander system. The calibration circuit required an additional board ("ABE" - automatic band calibration) in the unit, the software part was already in the ROM mask of the microprocessor also built into the HMK-D200, but is deactivated in these units.

Other models of the same series: