This video presents a comprehensive review and teardown of the Revisions RT97L, a new 22-watt GMRS repeater, and contrasts it with its 10-watt predecessor, the RT97S. The presenter highlights the RT97L's significantly improved and more engineered physical design, featuring a robust, waterproof chassis and streamlined connectors. Functional testing confirms its stated 22-watt high power output (measured at 22.8W) and reveals a low power mode outputting 6.4W, exceeding its 5W specification. An internal examination showcases a large 25-watt duplexer, multi-stage RF amplification for the transmitter (utilizing a high-power FET), and a well-filtered receiver circuit. The internal "gold board" PCB layout and overall professional construction are lauded, indicating a significant engineering advancement over the previous model.
Exploring the Revisions RT97L GMRS Repeater: Power, Design, and Internal Engineering
0:00 Introduction to RT97L Repeater: The video introduces the Revisions RT97L, a new GMRS repeater, emphasizing its heavier (8 lbs) and more streamlined, engineered design compared to the previous RT97S model.
0:29 Increased Power Output: The RT97L boasts a 22-watt output, more than double the 10-watt RT97S, making it a powerful solution for field applications like ATV or Jeep excursions to establish local communication networks.
2:03 GMRS License & Accessories: It's noted that an FCC GMRS license is required (covering the user and their family, including repeater use). The unit comes with versatile accessories, including a 12V car adapter, programming cable, and mounting brackets.
4:45 High Power Output Confirmed: Testing with a power meter confirms the repeater's high power output, measuring an initial 22.8 watts, settling around 21.9 watts.
5:52 Low Power Output Exceeds Spec: In low power mode, the device outputs approximately 6.4 watts, surpassing the datasheet's stated 5-watt specification.
6:13 Versatile 9-Pin Connector: A custom test board demonstrates the functionality of the 9-pin connector, highlighting its ability to trigger transmit and its potential for connecting external microphone/speaker to function as a base station.
6:41 Internal Components - Duplexer & Sealing: The teardown reveals a large, 25-watt rated duplexer and a waterproof design implemented with rubber grommets and a sealed 9-pin connector, underscoring its robust build quality.
8:45 Main Board & RF Sections: The main PCB is housed within a cast aluminum plate, featuring distinct sections for the multi-stage transmitter amplifier (including a powerful 22W FET) and a well-filtered receiver.
12:29 Professional Build Quality: The internal "gold board" PCB and overall construction are highly praised for their professional appearance, cleanliness, and thoughtful engineering, signifying a substantial improvement over the previous model.
12:50 Conclusion - Significant Improvement: The RT97L is presented as a notable enhancement over its predecessor, justifying a potentially higher price tag with its superior performance and refined engineering.