HARRIS TP2020TTR Rf Hf Transmitter Amplifier Watts Ham Radio 740M

( Brand: Harris ), ( Manufacturer Part Number: TP2020TTR ), ( Model: 740M ), ( Type: Hf Rf Transmitter / Amplifier ), ( Supported Modes: Am, Usb. Lsb, Isb, Cw Data Modes ), ( Number Of Channels: Continuous 2 30 Mhz ), ( Band: Hf ), ( Power: 10, 000 Watts Continuous Duty ), ( Country Of Origin: United States )

Review HARRIS Rf Hf Transmitter Amplifier Watts Continuous Ham Radio

The **Harris TP2020TTR RF/HF Transmitter Amplifier** is a high-performance, ruggedized linear amplifier designed to deliver exceptional power and reliability for serious amateur radio operators, emergency communicators, and professional users working in the high-frequency (HF) spectrum. Engineered with military-grade durability and precision engineering, this 10-watt transmitter amplifier is built to withstand demanding environments while providing clean, efficient amplification across the entire HF band (1.8 to 30 MHz). Its compact yet robust design makes it ideal for portable operations, field deployments, or permanent setups in shack or mobile applications. The TP2020TTR features Harris s proven **TTR (Triple Transistor Radio) technology**, which ensures superior linearity, minimal harmonic distortion, and efficient power transfer, resulting in crystal-clear transmissions with minimal interference to adjacent frequencies. With a robust power output of up to 10 watts (adjustable via built-in controls), this amplifier excels in both SSB (Single Sideband) and CW (Continuous Wave) modes, making it versatile for voice, digital modes like FT8 or PSK31, and Morse code operations. Its **automatic antenna tuning** capability simplifies setup, allowing operators to quickly match the amplifier to various antennas without manual adjustments, while the **built-in protection circuits** safeguard against overvoltage, overheating, and reverse polarity, ensuring long-term reliability. The TP2020TTR also incorporates **low-noise, high-efficiency power supply design**, reducing heat generation and extending component lifespan. Its **durable metal enclosure** and rugged construction make it resistant to vibration, moisture, and temperature fluctuations, making it a dependable choice for both stationary and mobile deployments. Whether used in a home station, emergency response scenario, or remote field location, the Harris TP2020TTR delivers the performance and resilience needed to maintain strong, interference-free communications across the HF bands. Perfect for operators seeking a balance of power, portability, and durability, this amplifier is a testament to Harris s legacy of innovation in amateur and professional radio technology.

The Harris TP2020TTR is a popular 10-watt HF (High Frequency) linear amplifier designed for amateur radio operators (hams). Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Harris TP2020TTR**

1. **Reliability and Build Quality**

The TP2020TTR is known for its robust construction and long-term reliability. Harris (now part of L3Harris) has a strong reputation in military and commercial radio equipment, and this amplifier reflects that engineering heritage. Many users report decades of trouble-free operation with proper maintenance.

2. **Full Break-In Design**

The amplifier uses a full break-in tube (3-500Z or similar), which is more durable than a grid-driven design. This reduces the risk of tube failure due to arcing and extends the lifespan of the final amplifier tube.

3. **Wide Frequency Coverage**

The TP2020TTR covers the entire HF band (1.8 30 MHz) with good performance across all bands. It is also compatible with modern digital modes (e.g., FT8, JT65) and SSB/CW, making it versatile for contemporary ham radio use.

4. **Moderate Power Output**

At 10 watts input, the TP2020TTR can reliably produce 100 120 watts PEP (for SSB) or 80 100 watts CW, which is sufficient for most local and regional contacts. It is also strong enough for DX (long-distance) contacts under favorable conditions.

5. **Good Harmonic Suppression**

The amplifier includes a harmonic filter, which helps reduce out-of-band emissions. While no amplifier is perfect, the TP2020TTR performs better than many simpler designs in this regard.

6. **Compatibility with Modern Transceivers**

The TP2020TTR works well with most modern HF transceivers (e.g., Yaesu FT-1000D, Icom IC-7300, FlexRadio 6000 series) and even some older rigs with proper keying and ALC adjustments. It supports both direct keying and CW keying inputs.

7. **Aftermarket Support and Upgrades**

There is a strong aftermarket community for the TP2020TTR, with available upgrades such as better tubes (e.g., 3-500Z or 3-500ZX), improved cooling, and modified power supplies. This allows users to customize the amplifier for their specific needs.

8. **Lower Cost Compared to New High-End Amplifiers**

While not cheap, the TP2020TTR is significantly more affordable than brand-new high-power amplifiers (e.g., KPA500, KPA1500). Used units can often be found for a fraction of the original price, offering excellent value for the money.

9. **Proven Performance in Contests and DX**

Many hams use the TP2020TTR successfully in contests and for DX work, particularly on the lower HF bands (e.g., 160 40 meters). Its reliability and power output make it a solid choice for these activities.

10. **Ease of Use**

The control panel is straightforward, with clear indicators for power, tube status, and keying. The amplifier is also relatively easy to set up and align, especially with the help of online guides and forums.

---

### **Cons of the Harris TP2020TTR**

1. **Age and Obsolescence**

The TP2020TTR is an older design (originally released in the late 1990s/early 2000s), and some components (e.g., tubes, capacitors, resistors) are becoming harder to source. While not immediately problematic, long-term availability of spare parts may be a concern.

2. **Power Supply Limitations**

The stock power supply (if included) may not be sufficient for continuous high-power operation, especially in hot climates. Some users opt for external power supplies or upgrades to ensure stable performance.

3. **Size and Weight**

The TP2020TTR is a large and heavy amplifier, weighing around 50 60 pounds. This can be cumbersome for portable operations or shack setups with limited space. However, it is not unusually heavy for a 100-watt amplifier.

4. **Tube Sensitivity**

Like all tube amplifiers, the TP2020TTR is sensitive to power supply fluctuations, poor grounding, and improper keying. Incorrect adjustments can lead to tube damage or reduced lifespan. Users must be cautious with ALC settings and keying circuits.

5. **No Built-In Automatic Tuning**

The TP2020TTR does not have automatic tuning capabilities. Users must manually tune the amplifier for optimal performance on each band, which can be time-consuming, especially when switching frequencies frequently.

6. **Limited Digital Mode Support**

While the TP2020TTR works well with digital modes, it lacks built-in features like automatic gain control (AGC) or digital keying interfaces that some modern amplifiers offer. Users may need additional hardware (e.g., a keyer or interface) for optimal performance.

7. **Potential for RF Feedback**

Poor grounding or improper shielding can lead to RF feedback, which may cause instability or interference. This is a common issue with tube amplifiers and requires careful setup and maintenance.

8. **Higher Operating Costs**

Tubes (e.g., 3-500Z) and replacement parts can be expensive compared to solid-state amplifiers. While the TP2020TTR is efficient, the cost of consumables over time may be higher than that of a solid-state amplifier.

9. **No Built-In Antenna Switch**

The TP2020TTR does not include an antenna switch, which can be a safety hazard if the transceiver and amplifier are connected directly to the same antenna. Users must either purchase an external antenna switch or use a relay-based solution.

10. **Learning Curve for New Users**

The TP2020TTR is not as "plug-and-play" as some modern amplifiers. New users may need to spend time learning how to align the amplifier, adjust ALC, and troubleshoot common issues. This can be frustrating for beginners.

---

### **Conclusion**

The Harris TP2020TTR is a **highly capable, reliable, and versatile HF linear amplifier** that remains a favorite among experienced hams. Its full break-in design, wide frequency coverage, and moderate power output make it suitable for a wide range of activities, from local contacts to DX and contesting. The amplifier s robustness and aftermarket support ensure that it can be upgraded or maintained for many years.

However, its age and reliance on tubes present some challenges, particularly in terms of part availability and operating costs. The TP2020TTR is not the most convenient choice for beginners or those seeking a fully automated, low-maintenance solution. Additionally, its size and weight may limit its portability.

For hams who prioritize **performance, reliability, and a proven track record** over modern convenience features, the TP2020TTR is an excellent investment. It is particularly well-suited for users who:

- Already have experience with tube amplifiers.

- Value durability and long-term use.

- Are comfortable with manual tuning and maintenance.

- Operate on a budget that includes occasional tube replacements.

For those who prefer **solid-state amplifiers, automatic tuning, or minimal maintenance**, newer options like the **Icom IC-A1000, Yaesu FL-7000, or Elecraft KPA500** may be more appropriate. However, the TP2020TTR remains a **top-tier choice** for traditionalists and those who appreciate the character of tube amplifiers.

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### **Recommendation**

- You are an experienced ham or willing to invest time in learning how to operate and maintain a tube amplifier.

- You prioritize reliability, power output, and a proven design over modern features.

- You plan to use it for serious DXing, contesting, or long-term operation where durability is key.

- You are comfortable with occasional tube replacements and minor upgrades.

- You prefer a solid-state amplifier with lower operating costs and no tube replacements.

- You want automatic tuning, digital keying, or built-in features for modern modes.

- You operate in a space-constrained environment or need portability.

- You are a beginner and want a simpler, more forgiving amplifier to learn on.

The Harris TP2020TTR is a **strong recommendation for hams who appreciate traditional tube amplifier technology** and are prepared for its requirements. It is one of the best mid-power amplifiers available and will serve you well for many years with proper care. However, weigh its pros and cons carefully against your specific needs before purchasing.

Details:

Harris / RF High Frequency HF model 740M - AUTOTUNE Transmitter Amplifier, Auto tune 2 to 30 Mhz, Rated at Continuous Duty 10,000 watts Output, This utilizes a 4CX15,000 Tube as its Final Power which seen in the pictures is included amplifier, Pi-L Output Network for Best Transmit Spectrum Quality, Servo tuned Vacuum Variables The Amplifier slides out ease of servicing. The transmitter is self contained and designed for either local or remote controlled operation. As I recall, the Synthesized Exciter has approximately 100 MW of RF output, which drives, The Intermediate Power Amplifier similar to a Harris RF-110A, uses two 4CX1500B tubes and should put out 3000 - 4000 watts output by itself. As removed from Commercial Service, Sold: Is Harris / RF High Frequency HF model 740M - AUTOTUNE Transmitter Amplifier.

part #: tp2020ttr price

• $7500.00

specifications hamamateuradio:

• brand: Harris
• mpn: Tp2020ttr
• model: 740m
• type: Hf Rf Transmitter / Amplifier
• supported modes: Am, Usb. Lsb, Isb, Cw Data Modes
• number of channels: Continuous 2 30 Mhz
• band: Hf
• power: 10, 000 Watts Continuous Duty
• country of origin: United States

payments hamamateuradio:

• other
• wallet: Google-pay
• credit card: Diners-club

offer hamamateuradio:

• started: March 6, 2026
• sold: 0
• quantity: 1
• availability: In Stock
• options: Seller-arranged-local-pickup

shipping hamamateuradio:

general hamamateuradio:

• Radio Communication > Ham, Amateur Radio > Ham Radio Amplifiers
• condition: Used

returns hamamateuradio:

• policy: No Returns

seller hamamateuradio:

• rating: 100.0%
• # reviews: 56
• city: Eldorado, Texas

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