GRE GENERAL RESEARCH OF ELECTRONICS 20-113 Radio Realistic PRO-2021 200-CHANNELSCANNER Receiver

( Brand: Gre General Research Of Electronics ), ( Manufacturer Part Number: 20-113 ), ( Supported Modes: Am, Fm ), ( Color: Black ), ( Band: Am/fm ), ( Year Manufactured: 1987 And 1988 ), ( Type: Scanner ), ( Unit Type: Lb ), ( Number Of Channels: 200 ), ( Manufacturer Warranty: Expired ), ( Fcc Id: Aa09za20-113 ), ( Features: Analog ), ( Unit Quantity: 5.2 ), ( Country Of Origin: Japan )

Review GRE GENERAL RESEARCH OF ELECTRONICS Radio Shack Realistic Pro-2021 Receiver Model

The **Gre General Research PRO-2021 200-Channel Radio Realistic Scanner Receiver** is a high-performance, all-in-one radio scanning solution designed for enthusiasts, professionals, and hobbyists who demand precision, versatility, and reliability in their communications monitoring. Engineered with cutting-edge technology, this advanced scanner receiver excels in capturing a vast spectrum of frequencies, from critical emergency and public safety channels to aviation, maritime, and amateur radio transmissions. Its **200-channel memory capacity** allows users to store and quickly access frequently monitored frequencies, making it ideal for those who need to track multiple bands simultaneously without constant manual tuning. The PRO-2021 features a **realistic audio output**, delivering crystal-clear reception with minimal distortion, ensuring that every transmission whether it s a police dispatch, fire department update, or aviation control tower conversation is intelligible and immersive. Built with a **rugged, durable chassis**, this scanner is designed to withstand frequent use, offering a sturdy construction that resists wear and tear, while its intuitive **backlit LCD display** provides easy readability in low-light conditions. Whether used for surveillance, emergency preparedness, or simply satisfying the curiosity of a dedicated radio enthusiast, the PRO-2021 combines **broadband scanning capabilities** with **selective tuning precision**, making it one of the most comprehensive and user-friendly receivers available. Its **automatic channel scanning function** allows for seamless monitoring of entire frequency ranges, while its **manual tuning controls** offer fine-grained adjustments for those who require exact frequency targeting. Additionally, the receiver supports **multiple scanning modes**, including priority scanning, which ensures that critical channels are monitored first, and **band splitting**, enabling simultaneous tracking of different frequency ranges. With its **compact yet functional design**, the PRO-2021 is perfect for both desktop and portable use, offering a balance of performance and convenience. Whether you're a security professional, a hobbyist, or someone who simply enjoys staying informed about real-world communications, the Gre General Research PRO-2021 delivers an unparalleled listening experience with unmatched reliability and flexibility.

### **Pros and Cons of the GRE General Research GR-20-113 Radio Realistic Pro (200-Channel Scanner Receiver)**

#### **Pros**

1. **Wide Frequency Coverage** The GR-20-113 covers a broad spectrum, including VHF/UHF public safety, aviation, marine, and general broadcast bands. This makes it useful for law enforcement, emergency services, aviation enthusiasts, and general scanning purposes.

2. **200-Channel Memory Storage** The built-in memory allows users to store frequently scanned frequencies, making it convenient for quick access to important channels without manual tuning.

3. **Realistic Audio Output** The receiver is designed to provide clear and natural-sounding audio, which is beneficial for monitoring conversations, broadcasts, and emergency communications without distortion.

4. **Portable Design** The compact and lightweight construction makes it easy to carry, ideal for field use, travel, or home monitoring.

5. **User-Friendly Interface** The controls are straightforward, with intuitive buttons for channel selection, scanning, and volume adjustment, making it accessible for beginners and experienced users alike.

6. **Durable Construction** The receiver appears to be built with quality materials, suggesting reliability for frequent use, including in less-than-ideal conditions.

7. **Compatibility with Accessories** It can be paired with external speakers or headphones for better audio quality in noisy environments.

8. **Affordable Price** Compared to some professional-grade scanners, this model offers a cost-effective solution for hobbyists and professionals who need a reliable scanner without excessive features.

9. **Good for Emergency Preparedness** The ability to monitor police, fire, and emergency services frequencies makes it a valuable tool for disaster preparedness and situational awareness.

10. **No Subscription Required** Unlike some digital scanners, this model does not require paid updates or subscriptions, making it a low-maintenance option.

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#### **Cons**

1. **Limited Digital Features** Unlike newer digital scanners (e.g., Uniden or Whistler models), this appears to be an analog receiver, which may lack advanced features like digital trunking (DTR) or encryption bypass capabilities.

2. **No Built-in GPS or Location Tracking** Some modern scanners include GPS features for tracking emergency units, but this model does not appear to offer that functionality.

3. **Potential for Interference** In areas with heavy radio traffic or poor signal conditions, weak signals or interference may still be an issue, though this is common across most scanners.

4. **No Bluetooth or Wireless Connectivity** The lack of wireless features means you cannot stream audio to smartphones or other devices without external hardware.

5. **Battery Life Limitations** If used with portable power sources, battery life may be shorter compared to newer models with better power efficiency.

6. **No Touchscreen or Advanced Programming** The interface is button-based, which may feel outdated compared to touchscreen scanners with more intuitive programming options.

7. **Limited Software Updates** Since it is an older model (2021), it may not receive long-term software updates or compatibility fixes for evolving radio protocols.

8. **No Built-in Noise Reduction** Some scanners include noise-canceling features, but this model may not offer the same level of audio clarity in noisy environments.

9. **Potential for Obsolescence** As radio technologies evolve (e.g., digital trunking, encryption), this analog scanner may become less effective for monitoring modern communication systems.

10. **No Warranty or Customer Support Details** Depending on the seller, warranty coverage and customer support may vary, which could be a concern if technical issues arise.

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### **Conclusion**

The **GRE General Research GR-20-113 Radio Realistic Pro** is a solid choice for users who prioritize **wide-frequency coverage, simplicity, and affordability** in an analog scanner. It excels in **public safety monitoring, aviation, and general scanning** without requiring complex programming. However, its **lack of digital features, outdated interface, and potential limitations in modern radio environments** may make it less ideal for users who need advanced capabilities like digital trunking or GPS tracking.

If your primary needs align with **basic analog scanning, emergency preparedness, or hobbyist use**, this scanner is a practical and budget-friendly option. However, if you require **digital features, future-proofing, or advanced programming**, investing in a newer digital scanner (e.g., Uniden BCD436HP, Whistler WT2050) may be more beneficial in the long run.

### **Recommendation**

- You need a **reliable, analog scanner** for public safety, aviation, or general monitoring.

- You prefer a **simple, no-frills device** without digital complexities.

- You are on a **tight budget** and do not require advanced features.

- You primarily use it for **emergency preparedness** or hobbyist scanning.

- You require **digital trunking (DTR) or encryption bypass** capabilities.

- You want **future-proofing** for evolving radio technologies.

- You need **GPS tracking, Bluetooth, or touchscreen programming**.

- You are in an area with **heavy digital radio traffic** where analog-only scanners may struggle.

For most **serious hobbyists or professionals**, upgrading to a **digital scanner** would be the better long-term investment. However, the GR-20-113 remains a **great analog option** for those who do not need the latest digital features.

Details:

This listing is for the US lower 48 states only. The LCD readout is not backbit as designed not sure why but can be seen in a lighted room. The radio will produce a beep at the end scan until 9-volt battery not supplied is installed in compartment rear of unit for memory back-up frequencies stored. The Original box shows signs of wear and the Styrofoam insert in is missing.

The unit serial number written in the owners manual is different from on. Volume and squelch control pots were cleaned lubricated for a clear loud audio. A nice clean receiver for daily use or your scanner collection. This receiver is a really nice clean radio supplied with the mobile mounting bracket, antenna, owners manual and original box.

part #: 20113 price

• $12.00

specifications hamamateuradio:

• brand: Gre General Research Of Electronics
• mpn: 20-113
• supported modes: Am, Fm
• color: Black
• band: Am/fm
• year manufactured: 1987 And 1988
• type: Scanner
• unit type: Lb
• number of channels: 200
• manufacturer warranty: Expired
• fcc id: Aa09za20-113
• features: Analog
• unit quantity: 5.2
• country of origin: Japan

shipping hamamateuradio:

• carrier: USPS
• transit: 5-10 Days
• class: Standard
• type: Calculated
• service: USPS Ground Advantage
• cost: $13.53

offer hamamateuradio:

• sold: 0
• started: March 18, 2026
• availability: In Stock
• options: Ship-to-home
• quantity: 1

general hamamateuradio:

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

returns hamamateuradio:

• policy: No Returns

seller hamamateuradio:

• city: Berwick, Pennsylvania
• rating: 100.0%
• # reviews: 668

payments hamamateuradio:

• wallet: Paypal
• credit card: Mastercard
• other