Country of Manufacture:Hungary
Speeds: 7 1/2
Max Reel Size("): 10.5"
Number of heads:
Dimension: 930 mm x 700 mm x 630 mm
Head Composition: Permalloy
Head Configuration: Stereo - Stacked
# Motors: 3
Frequency Response:15 ips 30-18.000 Hz +-3 dB 7.5ips 40 - 16000 Hz +- 3 dB
Wow and Flutter:.1
Signal-to-Noise Ratio:65 - 64 dB
Sound quality rating:5 / 10
Long-term reliability rating: 5 / 10
Weight: 75 kg
Apparently there were over 10 different versions of the 610 available.
The STM-600 & STM-610 (stereo) were later models that were standalone tape recorders modular in design and had some upgrades and could work with earlier production models, the STM 200 & 210.
Apparently these early models had been quite successful selling over 8000 units.
The STM-600 & STM-610 had servo control motors and heads made of Recovac?
Digital tape counter
Equalization NAB or CCIR
Stroboscope for tape speed
Auto shut off
Here’s a Website in Romania that may have items for sale
M-600 (and its stereo version STM-610STM-600 (and its stereo version STM-610
610.04 slow speed 7.5, 15
610.05 North American voltage 60 Hz 117 V
610.09 includes 2 2w amplifiers and speakers
610.10 XLR inputs and outputs
610.11 pitch control
610.13 automatic recording level
610.19 Cueing teacher
610.31 low-speed 7.5, 3 3/4