The **T-10** (Object 730) was the final evolution of the Soviet IS-series heavy tanks. Unlike modern Main Battle Tanks (MBTs), the T-10 was a product of the late 1940s and 1950s. Its electronic and electrical components represent the transition from purely mechanical systems to early analog fire control and stabilization. --- ### 1. Main Electronic and Electrical Subsystems The T-10’s electronics can be categorized into four primary groups: | System Category | Components | Function | | :--- | :--- | :--- | | **Fire Control** | PUOT-1 "Uragan" / PUOT-2 "Grom" | Two-plane gyroscopic stabilization for the main gun. | | **Observation** | TPN-1-29-11 | Early active infrared (IR) night vision systems. | | **Communication** | R-113 / R-120 Radio | Short-wave radio sets for tank-to-tank communication. | | **Electrical Power** | G-74 Generator + 6-STEN-140M | 24V DC system powered by lead-acid batteries. | --- ### 2. Gun Stabilization (The "Electronics" of Combat) The most significant "high-tech" feature for its era was the stabilization system, which allowed the tank to fire more accurately while moving. * **TPS-1 and T2S (Uragan/Grom):** These systems used magnetic amplifiers and gyroscopes. * **Vertical/Horizontal Control:** The T-10A introduced vertical stabilization, while the T-10B and T-10M featured full two-plane stabilization. * **Electronic Firing:** The trigger mechanism was converted from a purely mechanical linkage to an electric solenoid-actuated firing pin for the 122mm M-62-T2 gun. ### 3. Night Vision and Optics As the T-10 evolved into the T-10M (the most produced variant), it incorporated active infrared electronics: * **L-2 "Luna" Searchlight:** An infrared projector that emitted light invisible to the naked eye but visible through the tank’s optics. * **TPN-1 Night Sight:** An image converter tube that required a high-voltage power supply to transform IR light into a visible green-scale image for the gunner. * **OU-3 Searchlight:** A smaller IR spotlight specifically for the commander’s cupola. ### 4. Internal Communication (Intercom) The crew communicated via the **R-120 TPU (Tank Planning Unit)**. This was an analog tube-based (later transistorized) intercom system integrated into the crew's leather helmets (shlemofon), which utilized throat microphones (laryngophones) to cancel out engine noise. --- ### Summary of Evolution (T-10 to T-10M) 1. **T-10 (1953):** Basic electrical suite; no stabilization. 2. **T-10A:** Added "Uragan" vertical stabilizer and an automated fume extractor. 3. **T-10B:** Added "Grom" 2-plane stabilizer. 4. **T-10M:** Final version with full IR night vision suites, R-113 high-frequency radios, and advanced electrical turret traverse motors.