ITT 8004201G2 Transmitter Radio Solid Vhf Am T-1108/GRT-21

( Brand: Itt ), ( Manufacturer Part Number: 8004201G2 ), ( Model: T-1108/GRT-2 ), ( Type: Ham Radio Transmitter ), ( Band: Vhf ), ( Country Of Origin: United States )

Review ITT Transmitter Radio T-1108/grt-21 Solid state Vhf am Untested

The **ITT 8004201G2 Transmitter Radio (T-1108/GRT-21) Solid-State VHF-AM** is a robust, high-performance military-grade radio designed for reliable communication in demanding operational environments. Part of the GRC-110 series, this transmitter operates in the Very High Frequency (VHF) band, specifically within the AM (Amplitude Modulation) spectrum, making it ideal for secure, long-range voice and data transmission across land, sea, and air platforms. Built with solid-state circuitry, the T-1108/GRT-21 eliminates the need for bulky vacuum tubes, reducing weight, power consumption, and maintenance requirements while enhancing durability in harsh conditions. Its compact yet rugged design ensures compatibility with a variety of military vehicles, ships, and fixed installations, offering seamless integration into existing communication networks.

This transmitter excels in providing clear, interference-resistant transmissions over extended ranges, thanks to its advanced frequency stability and low phase noise characteristics. The GRT-21 module incorporates a high-efficiency power amplifier, delivering consistent output power typically around 25 watts while maintaining minimal distortion, ensuring intelligible audio even under challenging signal conditions. Its solid-state construction also contributes to a longer operational lifespan, reducing downtime and logistical burdens in field deployments. The radio supports a wide frequency range, accommodating both fixed and variable channel assignments, and is engineered to withstand extreme temperatures, high humidity, and mechanical stress, making it a dependable choice for military, government, and emergency response applications.

Designed with modularity in mind, the T-1108/GRT-21 can be easily interfaced with other ITT communication systems, including receivers, antennas, and encryption devices, to form a cohesive network. Its robust shielding and filtering capabilities protect against electromagnetic interference (EMI) and radio frequency interference (RFI), ensuring secure and reliable communication even in electrically noisy environments. Additionally, the transmitter s design adheres to stringent military specifications, including MIL-STD-810 for environmental durability and MIL-STD-461 for electromagnetic compatibility, guaranteeing performance under the most demanding operational scenarios. Whether deployed in a tactical vehicle, aboard a naval vessel, or in a fixed command center, the ITT 8004201G2 transmitter delivers uncompromising reliability, making it a cornerstone of modern military and strategic communication systems.

The **ITT 8004201G2 Transmitter (T-1108/GRT-21)** is a solid-state VHF-AM radio transmitter designed for military and government applications, particularly in secure voice communications. Below is a detailed analysis of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the ITT 8004201G2 Transmitter**

1. **Reliability and Durability**

The T-1108/GRT-21 is a ruggedized military-grade transmitter, built to withstand harsh environmental conditions, including extreme temperatures, vibration, and shock. Its solid-state design reduces mechanical wear compared to tube-based systems, contributing to long-term reliability.

2. **Secure and Encrypted Communications**

This transmitter is designed for secure military and government use, often integrated with encryption systems (such as STU-III or later variants) to ensure confidentiality. It supports frequency-hopping spread spectrum (FHSS) and other secure modulation techniques, making it resistant to jamming and interception.

3. **Wide Frequency Range**

The unit operates across the VHF-AM band (typically 30 88 MHz), providing flexibility for different operational requirements, including tactical, command-and-control, and fixed-site communications.

4. **Modular and Upgradable Design**

The ITT (now part of Harris Corporation) systems are known for modularity, allowing for upgrades to firmware, encryption, or additional features without replacing the entire unit. This extends the transmitter s lifespan and adaptability to evolving threats.

5. **Low Power Consumption**

Compared to some older military transmitters, the solid-state design of the T-1108/GRT-21 is more power-efficient, which is advantageous for portable or vehicle-mounted applications where battery life is a concern.

6. **Compatibility with Legacy Systems**

The transmitter is designed to interface with existing military radios, consoles, and network architectures, reducing the need for costly infrastructure overhauls when integrating into new or existing setups.

7. **Long-Term Availability of Parts**

As a legacy military system, spare parts and technical support may still be available through government or defense contractors, though availability can vary depending on the region and specific supply chain constraints.

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### **Cons of the ITT 8004201G2 Transmitter**

1. **Age and Obsolescence**

The T-1108/GRT-21 is an older design (originally fielded in the 1980s 1990s), which means it may lack modern features such as digital signal processing (DSP), software-defined radio (SDR) capabilities, or integration with contemporary networked systems. Obsolescence can also lead to difficulties in sourcing replacement components.

2. **Limited Digital Capabilities**

Unlike newer military radios, this transmitter is primarily analog (VHF-AM) and may not support digital voice (e.g., MIL-STD-188-110B) or data communications. This limits its utility in modern networks that rely on digital encryption and interoperability with non-military systems.

3. **Size and Weight**

While ruggedized, the unit may be bulkier and heavier than modern compact transmitters, which could be a drawback for portable or airborne applications where space and weight are critical.

4. **Maintenance Complexity**

Older military systems often require specialized training and technical expertise for maintenance. Troubleshooting may be more time-consuming compared to newer, more user-friendly systems with built-in diagnostics.

5. **Limited Software Upgrades**

Unlike modern radios that can receive over-the-air (OTA) software updates, the T-1108/GRT-21 may require physical access to update firmware or encryption keys, increasing logistical challenges in the field.

6. **Cost of Acquisition and Support**

While the initial purchase price may be reasonable, the long-term cost of ownership can be high due to the need for specialized technicians, spare parts, and potential upgrades. Newer systems may offer better cost efficiency over time despite a higher upfront cost.

7. **Interoperability Issues**

Integration with modern communication networks (e.g., satellite links, IP-based systems, or commercial radios) may require additional interfaces or bridges, adding complexity and potential points of failure.

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### **Conclusion**

The **ITT 8004201G2 Transmitter (T-1108/GRT-21)** remains a robust and reliable choice for secure VHF-AM communications in military and government applications where legacy systems are still in use. Its strengths lie in its durability, encryption capabilities, and compatibility with older infrastructure. However, its analog nature, lack of digital features, and potential obsolescence make it less suitable for modern or rapidly evolving operational environments.

For organizations with existing fleets of T-1108/GRT-21 radios and no immediate need for digital upgrades, this transmitter can continue to serve effectively as a backup or secondary system. For new deployments or forward-looking communications requirements, investing in a modern solid-state or software-defined radio (SDR) platform would likely offer greater flexibility, interoperability, and long-term cost savings.

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### **Recommendation**

- You are maintaining a legacy military communications network where this transmitter is already integrated.

- Secure, analog VHF-AM communications are a critical requirement, and no immediate transition to digital systems is planned.

- You have access to technical support and spare parts for long-term reliability.

- Cost efficiency in a known environment (e.g., secondary or backup systems) is prioritized over cutting-edge features.

- Your organization is transitioning to digital communications (e.g., MIL-STD-188-110B, Link 16, or satellite networks).

- You require interoperability with commercial or non-military systems.

- Weight, size, or power efficiency are critical factors in your application.

- You lack the resources to maintain an older system, and obsolescence risks outweigh its benefits.

- **Harris RF-7800 series** (digital VHF/UHF radios with encryption).

- **Rockwell Collins GR-74V** (software-defined tactical radio).

- **Thales TAC-4000** (modular, multi-band digital radio).

These systems offer better digital capabilities, reduced maintenance, and greater flexibility for future upgrades.

Details:

Device has scuffs and scratches. TransmItter Radio T-1108/GRT-21 Solid-State VHF-AM 8004201G2 Untested: Item Details: Manufacturer ITT, model T-1108/GRT-2, Part Number8004201G2, Condition Device is untested, Includes No accessories.

part #: 8004201g2 prices

• $139.99-$154.99

specifications hamamateuradio:

• brand: Itt
• mpn: 8004201g2
• model: T-1108/grt-2
• type: Ham Radio Transmitter
• band: Vhf
• country of origin: United States

seller hamamateuradio:

• rating: 99.7%
• city: Salisbury, North Carolina
• # reviews: 29388

shipping hamamateuradio:

• service: FedEx Ground / FedEx Home Delivery, FedEx 2Day
• type: Fixed
• transit: 2-6 Days
• carrier: FedEx
• class: Standard, Expedited
• cost: $60.00

returns hamamateuradio:

• policy: Returns Accepted
• time: 30 Days
• method: Money back
• paid by: Buyer

payments hamamateuradio:

• credit card: Discover
• other
• wallet: Google-pay

general hamamateuradio:

• condition: For parts or not working
• Radio Communication > Ham, Amateur Radio > Ham Radio TransmItters

offer hamamateuradio:

• best offers: True
• started: June 2, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0
• quantity: 1

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