PTA-6M

PTA-6M tachometer converter

PTA-6M is an electronic tachometer converter in the Power Transducers category and is used in TSA-6M tachometric signalling equipment. It forms part of a system that monitors the rotational speed of an auxiliary-power-unit or engine shaft and passes the processed signal to related indication and control circuits. The unit is not a standalone cockpit indicator; it works within the tachometric equipment set.

Its designation is relevant where a matching TSA-6M installation is being maintained. Confirm the aircraft installation, connector configuration, documentation and exact system version before ordering.

How PTA-6M works in TSA-6M equipment

In the documented TSA-6M arrangement, the DTE-5T tachometer sensor generates an electrical signal whose frequency follows shaft speed. PTA-6M receives the system signal and works with the ITA-6M indicator. Together, the equipment provides continuous remote indication of speed as a percentage of nominal value and discrete outputs at 45%, 70%, 90% and 105% of nominal speed.

These defined thresholds are used by the control system during auxiliary-power-unit operation. The converter therefore belongs to the tachometric signalling chain, not to a general electrical power-conversion system.

Related equipment and installation

The confirmed adjacent units are the DTE-5T tachometer sensor and the ITA-6M family indicator. The functional chain is DTE-5T sensor → PTA-6M converter → ITA-6M indicator and TSA-6M control circuits. Exact wire routing and physical location depend on the aircraft maintenance documentation.

For the Tu-134A installation described in technical material, the converter is installed on the right side near frame 49 and supplied by the 27 V DC network. This note is specific to that installation and must not be transferred automatically to another type.

Documented applications of the tachometer converter

Maintenance and parts material identifies TSA-6M equipment including PTA-6M on Tu-154, Tu-134A, Yak-42, Il-76, Mi-26 and Mi-8MTV-1 aircraft. The unit is also associated with the TA-6/TA-6A auxiliary-power-unit tachometer installation. Confirm applicability against the parts catalogue or maintenance manual for the individual aircraft and modification.

Identification and ordering

Search forms include PTA-6M, PTA 6M, ПТА-6М and ПТА 6М. The supplied photographs show the actual housing, connector end and mounting lugs; the source image carries the marking «ПТА-6М». Reliable open-source data for individual dimensions, mass, connector pin count and power consumption were not found, so those values are not stated.

Please request a quotation with the exact designation, aircraft type, TSA-6M configuration, required condition and documentation requirement.

Product Type: Tachometer converter

Designation: PTA-6M

Alternative Designations: PTA 6M; ПТА-6М; ПТА 6М

Function: Signal processing within TSA-6M tachometric signalling equipment

System: TSA-6M tachometric signalling equipment

Associated Equipment: DTE-5T tachometer sensor; ITA-6M, ITA-6MB or ITA-6MS indicator depending on TSA-6M variant

Signal Thresholds: 45%; 70%; 90%; 105% of nominal shaft speed within TSA-6M equipment

Power Supply: 27 V DC for the documented Tu-134A installation

Operating Temperature: −60 °C to +60 °C for TSA-6M equipment

Vibration Resistance: 10–30 Hz; acceleration 5 g for PTA-6M in TSA-6M specification

Service Life: 6 years for the converter in TSA-6M specification

Operating Life: 4,500 flight hours for PTA-6M in TSA-6M specification

Compatible Aircraft: Tu-154; Tu-134A; Yak-42; Il-76; Mi-26; Mi-8MTV-1 — confirm by aircraft documentation

Installation: Right side near frame 49 on documented Tu-134A installation; other locations require confirmation

Dimensions and Mass: Reliable individual data in open sources were not found

Technical Documentation: TSA-6M maintenance documentation, aircraft parts catalogue and test records when available

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