Ramsey Electronics QRP20 manual CW Transmitter

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20 METER (14MHz)

CW TRANSMITTER

Ramsey Electronics Model No.

QRP20

THE RAMSEY QRP20 IS AN AMAZING PERFORMER THAT WILL WORK THE WORLD ON ABOUT A WATT! FOLKS OF ALL AGES HAVE SUCCESSFULLY BUILT AND ENJOYED THIS EASY, FUN KIT.

Ideal for portable or travel fun

VCXO design allows up to 8 - 10 KHz of tuning about the crystal frequency

Front panel switching of TWO channels and includes a crystal for 14.06 MHz, the International QRP frequency

Excellent and clean keying waveform

Built-in antenna T-R switch

Operates on 12 - 15 volts DC at 1/4 amp current

Appoximately 1 Watt RF power

Clear, concise step-by-step instructions carefully guide you to a finished kit that not only works - but you’ll also learn too!

Proven design that has won many of awards for operators around the country!

Add our case and knob set for a finished ‘Pro’ look. Cases match all Ramsey products

QRP-20 • 1

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Contents CW Transmitter Ramsey Transmitter Kits QRP20 20 Meter CW Transmitter KIT Introduction Watts vs 1 Watt Understanding the Difference QRP-20 Circuit Description WHO should USE a QRP TRANSMITTER?Block Diagram Capacitors Parts Supplied with QRP20 Transmitter KITQRP-20 QRP20 Parts Layout Diagram First Assembly Steps LEARN-AS-YOU-BUILD Transmitter Assembly StrategyQRP-20 Building the VXO Variable Crystal Oscillator Halftime Suggestion Further Assembly Crystal Oscillator TestingBuffer and RF Amplifier Wiring Initial Tests Your Power Supply and RF Output PowerVerifying Transmitter RF Output TRANS-RECEIVE Operation Maximizing RF Power OutputOther Enclosure Recommendations Ramsey Electronics CASE, Knob & Hardware OptionFinal Considerations Troubleshooting GuideQRP-20 Ramsey Kit Warranty Ramsey Model NO. QRP20 Meter CW Transmitter KIT

QRP20 specifications

The Ramsey Electronics QRP20 is a compact and innovative low-power transceiver designed for amateur radio enthusiasts who appreciate both portability and efficiency in their operations. This QRP (low power) radio is primarily aimed at those who seek to operate on the HF bands, providing an exhilarating experience for operators who thrive on the challenges and satisfaction of making contacts with minimal power output.

One of the standout features of the QRP20 is its compact design. This radio can easily fit into a backpack, making it ideal for field operation, portable use, or emergency communication scenarios. Weighing in at just a few pounds, it’s lightweight enough for extended outings without burdening the operator.

The QRP20 operates on a range of HF bands, specifically covering 20 meters, which is especially popular among amateur radio operators for its relatively consistent propagation and activity level. The transceiver leverages solid-state technology, ensuring reliability and optimizing performance. It can produce an output of up to 5 watts, which is standard for QRP operations, allowing operators to experiment with different antenna configurations and propagation techniques.

Another significant aspect of the QRP20 is its user-friendly interface. The radio features a straightforward layout with well-placed knobs and buttons for efficient tuning and operation. The built-in digital display provides clear visibility of frequency information and operational status, enhancing the overall user experience. In addition, the QRP20 includes a narrow bandwidth filter, which effectively reduces noise and enhances signal clarity, enabling clearer communication even in crowded band conditions.

The QRP20 is equipped with an internal speaker as well as a headphone jack for private listening. It also features a built-in keyer for CW (Continuous Wave) operation, making it versatile for various modes of amateur communication including voice and Morse code.

Powering the QRP20 is effortless, as it can be run off a standard 12V power supply or a rechargeable battery, giving operators flexibility in power sourcing. Whether during portable activations or in a home setup, the QRP20 is adaptable to different operating situations.

In conclusion, the Ramsey Electronics QRP20 is a remarkable choice for amateur radio users who value portability, versatility, and performance. Its efficient design, solid technology, and ease of use make it a compelling addition to any operator's gear, offering a satisfying QRP experience while staying connected with a global community of radio enthusiasts.