
( Brand: Collins ), ( Manufacturer Part Number: R648 ), ( Type: Receiver )
The Collins R648 R-648 ARR-41 Ham Radio Shortwave Receiver is a testament to the enduring legacy of Collins Radio, a brand renowned for its high-performance radio communication equipment. This versatile shortwave receiver is designed for serious ham radio enthusiasts, broadcast engineers, and communications professionals seeking exceptional audio quality and robust functionality.
The R648 is a fully-featured, high-frequency receiver, covering the entire shortwave band from 1.8 to 30 MHz. It boasts an impressive 1 kHz frequency step and a 200 Hz tuning resolution, ensuring precise and accurate tuning, even when operating in the most crowded frequency bands.
The receiver's front panel is thoughtfully designed, providing easy access to essential controls. A large, high-resolution meter offers real-time signal strength indication, while the sensitive S-meter provides a visual representation of signal quality. The R648 also features a built-in speaker and a 3.5mm headphone jack for private listening.
The Collins R648's receiver section employs a high-quality double-conversion architecture, ensuring superior image rejection and selectivity. It also features a highly stable frequency synthesizer, ensuring stable and accurate frequency tuning.
The R648's RF input stage is equipped with a high-quality low-noise preamplifier, ensuring exceptional sensitivity and a high dynamic range. The receiver's IF section employs Collins' proprietary crystal filters, known for their ultra-narrow bandwidth and exceptional selectivity.
The R648 ARR-41 model includes an Automatic RF Gain Control (AGC) feature, ensuring consistent audio levels across a wide range of signal strengths. It also features a built-in Automatic Notched Noise Blanker, which effectively eliminates annoying noise bursts commonly encountered in shortwave reception.
In summary, the Collins R648 R-648 ARR-41 Ham Radio Shortwave Receiver is a powerhouse of a receiver, offering exceptional performance, robust features, and exceptional build quality. Whether you're a seasoned ham radio operator, a broadcast engineer, or a communications professional, the R648 is an invaluable tool for your shortwave listening adventures.
1. High-Quality Construction: The Collins R648 is known for its robust and durable design, making it a reliable choice for long-term use.
2. Superior Reception: This receiver is capable of picking up weak signals that other radios may miss, thanks to its high-performance front-end and intermediate frequency (IF) filters.
3. Multiple Band Coverage: The R648 offers coverage across the shortwave, AM, and FM bands, providing a wide range of listening options.
4. User-Friendly Interface: Despite its advanced features, the R648 has an intuitive control layout, making it accessible for both beginners and experienced ham radio operators.
Cons:1. High Price Point: As a high-end receiver, the Collins R648 comes with a premium price tag, which may be prohibitive for some potential buyers.
2. Complexity: While the interface is user-friendly, the R648 has a lot of features and settings that can be overwhelming for beginners.
3. Size and Weight: Compared to some modern receivers, the Collins R648 is larger and heavier, which may be a concern for those who plan to use it for portable operations.
4. Limited New Parts Availability: Due to its age, finding new parts for the Collins R648 can be challenging. This could potentially lead to higher repair costs.
Conclusion:The Collins R648 is an excellent choice for ham radio enthusiasts who prioritize exceptional reception, high-quality construction, and a wide range of coverage. However, its high price point, complexity, size, and limited parts availability are factors that potential buyers should consider before making a purchase.
Recommendation:If you're a serious ham radio operator with the budget for it, the Collins R648 could be an excellent addition to your station. For those on a tighter budget or seeking a more user-friendly and portable receiver, other options may be more suitable.
Comes with some extra parts i've accumulated over the years. Sold as is and pictured. For sale is a working Collins R-648 aircraft receiver. This has the original power connector which is difficult to find.
Not pictured but has manual.