RI-65-30
Matching amplifier
Description
RI-65-30 matching amplifier for aircraft voice messages
RI-65-30 is an onboard matching amplifier used in aircraft voice warning and annunciation systems. The unit is installed between voice message equipment, aircraft radio equipment and pilot headset circuits. Its task is to amplify and match the speech signal so that warning messages are clearly heard by the crew through aircraft telephones and communication channels. In the Almaz-UP passported set, RI-65-30 is supplied together with the Almaz-UP-48 voice message playback unit, RI-65-20 remote control panel and summary passport.
Full descriptionCollapse description
Signal amplification and impedance matching
The RI-65-30 amplifier matches audio signals from connected voice units and radio equipment with pilot headset circuits. Aircraft audio systems may use different telephone types, including high-impedance and low-impedance headsets. Without correct matching, the voice warning signal may be too weak, distorted or unsuitable for the connected load. RI-65-30 adapts the output level and impedance so that spoken warnings remain intelligible in normal flight conditions and during abnormal or emergency situations.
Use with RI-65 and Almaz-UP equipment
RI-65-30 is used in onboard voice message systems such as RI-65-B and may also be included in Almaz-UP aircraft voice warning equipment. In such systems, the playback or voice generation unit creates the warning phrase, while RI-65-30 prepares the signal for delivery to the crew audio circuits. The unit may work together with RI-65-10 voice modules, Almaz-UP-48 playback units and RI-65-20 control equipment depending on aircraft configuration. Compatibility should always be confirmed by the aircraft wiring and system documentation.
Audio output to pilot headsets
The amplifier is designed to deliver a suitable signal to pilot headset telephones. It can provide output levels for high-impedance and low-impedance telephone circuits, depending on the connected load and aircraft system design. This is important because warning messages must remain clear even when the cockpit is noisy or the aircraft is operating in vibration-heavy conditions. When checking the unit, technicians normally verify not only electrical parameters, but also actual audibility and absence of distortion through the aircraft headset channels.
Normal and emergency operation
RI-65-30 is intended for stable operation in both normal and emergency modes. The power consumption differs between these modes, and the amplifier must continue to provide reliable speech signal transmission when the aircraft warning system is active. Since it is part of the warning chain, a fault in the amplifier may appear as weak audio, no voice message, excessive distortion or incorrect routing of speech warnings. Troubleshooting should include the amplifier, connected voice unit, control panel, headset lines, radio interface and aircraft wiring.
Aircraft operating environment
The RI-65-30 amplifier is built for aviation use and is rated for harsh onboard conditions. It must withstand low and high temperatures, humidity, vibration, linear acceleration, shock loads, frost and dew. This is typical for equipment installed on helicopters and transport aircraft, where vibration and changing environmental conditions are normal. The compact housing and low weight allow installation in onboard radio-electronic equipment compartments or other approved aircraft locations according to the mounting documentation.
Supply and identification of RI-65-30
For procurement, the full designation RI-65-30 should be specified. Alternative writing forms such as RI6530, RI 65 30 or ri-65-30 may appear in catalogs, but the correct aviation designation should be confirmed by label and documentation. The unit may be supplied as part of an Almaz-UP complete set or as an individual replacement amplifier. For aircraft use, condition, passport, storage history, connector condition, test status and compatibility with the installed RI-65 / Almaz-UP voice warning system should be checked before installation.
Technical details
- Product Type
- Onboard aircraft matching amplifier
- Designation
- RI-65-30
- Alternative Designations
- RI6530, RI 65 30, ri-65-30, ri6530, ri 65 30
- Function
- Signal amplification and impedance matching between voice units, radio equipment and pilot headsets
- Application / Where Used
- Aircraft and helicopter voice warning, annunciation and crew communication systems
All specificationsCollapse specifications
- Associated Systems
- RI-65-B, Almaz-UP, Almaz-UP-48 and compatible aircraft voice message systems
- Associated Equipment
- RI-65-10 voice unit; Almaz-UP-48 voice playback unit; RI-65-20 remote control panel; aircraft radio and headset circuits
- Input Function
- Receives audio signals from voice generation units and aircraft radio equipment
- Number of Inputs
- 12
- Output Function
- Delivers matched and amplified speech signals to pilot headset telephones
- Supported Headset Types
- High-impedance and low-impedance pilot telephones
- Gain
- 0.7 to 1.5
- Output Signal Level at 50 V Input, 1000 Hz
- 35–75 V for high-impedance headsets; 5.6–12 V for low-impedance headsets
- Linear Amplitude Deviation
- Not more than 2 dB up to 120 V output
- Total Harmonic Distortion
- Not more than 10% at 1000 Hz and 120 V output
- Frequency Response Non-Uniformity
- Not more than 6 dB in the 300–3400 Hz range
- Supply Voltage
- 24.3–29.7 V DC
- Operational Voltage Range
- 20–30 V DC
- Power Consumption, Normal Mode
- Not more than 10 W
- Power Consumption, Emergency Mode
- Not more than 16 W
- Dimensions
- 71 × 108 × 120 mm
- Weight
- Not more than 1.2 kg
- Operating Temperature Range
- −60 to +60 °C
- Relative Humidity
- Up to 98% at +40 °C
- Atmospheric Pressure
- 0.665–106 kPa
- Vibration Resistance
- 5–300 Hz up to 49 m/s²
- Linear Acceleration Resistance
- Up to 98 m/s²
- Shock Resistance
- Up to 117.7 m/s²
- Environmental Conditions
- Frost and dew
- Standard Almaz-UP Set Position
- Matching amplifier supplied with Almaz-UP-48 playback unit, RI-65-20 remote control panel and summary passport
- Documentation
- Technical passport and operation manuals available upon request
- Aircraft family
- Mi-8 / Mi-17 helicopter family
Payment & delivery
Orders ship from our hub in Dubai. Partner stock is first transferred to Dubai, then shipped to you.
Dubai stock: 100% before dispatch. Partner stock (Remote stock) and Pre-order: 50% advance payment to start the order and 50% before shipment from Dubai to you.
Availability, lead time, delivery cost and payment terms are confirmed for your order before payment.
In-person viewing of parts held in stock at our Dubai warehouse can be arranged on request.
Payment & delivery terms