MS-61

The MS-61 is an aircraft wire tape recorder designed for recording speech signals from onboard radio receivers and aircraft intercom systems, as well as for autonomous recording from laryngophones and crew headsets on aircraft.

The recorder performs magnetic recording on a wire recording medium using high-frequency bias, with automatic erasure of previous recordings by a high-frequency magnetic field in the erase head gap.

The MS-61 operates as part of onboard voice recording systems and consists of a recording unit and a control panel connected by cables, providing continuous recording and automatic start and stop based on input signal levels.

The product is also known under alternative designations MS-61, МС-61, MS-61B, МС-61Б, which refer to the same product type.

Product Type: Aircraft wire tape recorder
Function: Recording of speech signals and time information
Application / Where Used: Aircraft onboard voice recording systems
System / Installation Area: Onboard communication and recording system
Part of System / Included in Set: Recording unit; control panel; connecting cables
Compatible Aircraft / Equipment: Aircraft equipped with SPU and radio receivers
Recording Medium: Steel wire, diameter 0.05 mm
Operating Voltage: 27 V DC ±10 %
Power Consumption: Not more than 20 W
Frequency Range: 0.3 to 3.4 kHz
Linear Speed: 145 to 195 mm/s
Continuous Recording Duration: Not less than 5.5 h
Recording Current: 1.7 to 2.5 mA
Automatic Start Threshold (Laryngophone): 150 to 300 mV
Automatic Start Threshold (SPU): 5 to 8 V
Automatic Stop Delay: 5 to 25 s
Adjustment Range of Auto-Start (Laryngophone): 100 to 500 mV
Adjustment Range of Auto-Start (SPU): 3 to 15 V
Total Harmonic Distortion: Not more than 18 %
Operating Temperature Range: −60 to +50 °C
Relative Humidity: 95 to 98 % at +40 °C
Vibration Resistance: 10 to 80 Hz, up to 8.5 g
Shock Resistance: Up to 12 g
Weight: Not more than 4 kg
Technical Documentation: Passport MS-61

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.