20 METER CW TRANSMITTER KIT

 

 

Quick Reference Page Guide

 

 

Introduction to the QRP20

4

 

Understanding power levels

5

 

QRP20 Circuit description

7

 

Parts list

9

 

Schematic Diagram

10

 

Parts layout diagram

11

 

QRP20 Assembly instructions

12

 

Initial tests

17

 

Options for finishing project

20

 

Troubleshooting guide

21

 

Ramsey kit warranty

22

REQUIRED TOOLS

 

Soldering Iron Ramsey WLC100

 

Thin Rosin Core Solder Ramsey RTS12

 

Needle Nose Pliers Ramsey MPP4 or RTS05

 

Small Diagonal Cutters Ramsey RTS04

 

<OR> Technician’s Tool Kit TK405

 

ADDITIONAL SUGGESTED ITEMS

 

Holder for PC Board/Parts Ramsey HH3

Desoldering Braid Ramsey RTS08

Digital Multimeter Ramsey M133

Price: $5.00

Ramsey Publication No. QRP20

Assembly and Instruction manual for:

RAMSEY MODEL NO. QRP20

20 METER CW TRANSMITTER KIT

 

 

 

TOTAL SOLDER POINTS

 

 

 

159

RAMSEY ELECTRONICS, INC.

 

 

ESTIMATED ASSEMBLY

 

 

TIME

590 Fishers Station Drive

 

 

 

 

Beginner............... 4.7 hrs

Victor, New York 14564

 

 

 

 

Intermediate......... 2.7 hrs

Phone (585) 924-4560

 

 

QRP-20

• 24

Advanced ............. 2.0 hrs

Fax (585) 924-4555

 

 

 

www.ramseykits.com

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Ramsey Electronics manual 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.