Ramsey Electronics manual SR2 Parts Layout Diagram

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RSSI circuit is controlled by the value the feedback resistor R17. If you are commonly using a small antenna and listening to weak signals, increase the value of R17 to customize the response indication of D2, the signal strength LED.

The final stage, and the real secret to the sensitivity of the receiver, is the Automatic Gain Control (AGC). The gain control looks at the amount of signal level present at the output of the demodulator and varies the amount of gain the Amplifier has accordingly. If there is a strong signal coming through the demodulator the AGC circuit lowers the gain of the amplifier. If the receive signal coming through the demodulator is very weak, the AGC circuit increases the gain of the amplifier (Q2) allowing us to receive signals from around the world and listen to them with clarity.

SR2 PARTS LAYOUT DIAGRAM

SR2 – 8

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Contents Shortwave Radio Partial List of Available Kits Ramsey Transmitter Kits Table of Contents Shortwave RadioIntroduction to the SR2 What YOU can Expect to HearShortwave Listening AS a Hobby Circuit Description SR2 SR2 Parts Layout Diagram SR -2 Block D iagram Parts List Capacitors InductorsResistors SemiconductorsOptional Hardware and MiscellaneousREQUIRED, not Supplied Assembly Instructions Enough said... Let’s get buildingSR2 SR2 SR2 SR2 SR2 Progress Summary Shortwave Antenna Ideas Initial Testing and Adjustment C16 = T3 Slug T3 Slug Out Troubleshooting Tips Other Enclosure Recommendations Tuning DIAL?Ramsey Electronics CASE, Knob & Hardware Option Sample Shortwave Loggings Freq Country MHzSample Shortwave Loggings Con’t Freq Country MHz SR2 Ramsey Kit Warranty Estimated Assembly Time Required ToolsAdditional Suggested Items Total Solder Points

SR2 specifications

The Ramsey Electronics SR2 is a versatile and robust RF transmitter designed for a range of applications, including hobbyist projects, educational purposes, and practical uses in the field of amateur radio. Its compact size and user-friendly design make it a popular choice among enthusiasts and professionals alike.

One of the standout features of the SR2 is its frequency range, which typically spans from 88 MHz to 108 MHz. This wide range allows users to operate within the FM band, making it suitable for transmitting audio signals, music, or voice communications. This flexibility is particularly advantageous for those interested in creating their own radio stations or conducting experiments in radio frequency communication.

The SR2 utilizes advanced technology to ensure high-quality transmission. It incorporates modulation techniques that enhance audio clarity and reduce noise, resulting in a smoother listening experience. The transmitter is also equipped with a low distortion audio preamplifier, ensuring that sound quality remains pristine even at higher transmission stages.

Another important characteristic of the SR2 is its ease of assembly. The kit comes with all necessary components, including a printed circuit board (PCB), which simplifies the building process for users. Detailed instructions guide the user through the assembly, making it accessible even for those with limited electronics experience.

The SR2 also boasts a power output of approximately 100 mW, allowing for a transmission range of up to several miles, depending on the surroundings and antenna used. This power level strikes a balance between effective transmission and energy efficiency, catering to various operational settings.

In terms of design, the SR2 features a compact enclosure that protects the internal components from dust and damage, which is vital for maintaining reliability in various environments. Its user-friendly interface includes adjustable controls for tuning and volume, enabling users to customize their transmission settings easily.

Additionally, the SR2 is compatible with a variety of external audio sources, such as microphones, CD players, and smartphones, enhancing its versatility. The unit can be powered by standard power supplies or batteries, making it suitable for both portable and stationary use.

Overall, the Ramsey Electronics SR2 is a well-designed RF transmitter that combines quality, functionality, and ease of use, making it an excellent choice for anyone looking to explore the world of radio transmission.
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