Search results
This book aims to collect and share knowledge related to the art of QRP. There are many schemes and projects available on the web, but after some time some schemes disappear if the sites are no longer maintained.
SCHEMATIC-RF-UNIT-QRP_20W-rev21.pdf. Cannot retrieve latest commit at this time. History. 1.34 MB. Contribute to XGudron/UA3REO-DDC-Transceiver development by creating an account on GitHub.
The µSDX is a simple but very efficient QRP Multimode Shortwave Transceiver, that is able to transmit and receive SSB, CW, AM and FM. It can be configured for any Shortwave Band by exchanging/modifying RF PCB.
For extra fun, use this PA with https://github.com/kholia/HF-Balcony-Antenna-System. This design aspires to be the standard mW-to-QRP-Gallon HF PA in the ~600 INR (8 USD) design space. Well, it does much more than QRP now... Design Constraints: PCB is to be homebrewed.
For use as a simple RF/Clock generator for calibration reference or clock generation. Works with Arduino Uno, Nano and Pro Mini. Uses a common 128x64 I2C OLED SSD1306 display and Si5351 module.
1 /***** 2 10kHz to 225MHz VFO / RF Generator with Si5351 and Arduino Nano, with Intermediate Frequency (IF) offset 3 (+ or -), RX/TX Selector for QRP Transceivers, Band Presets and Bargraph S-Meter. See the schematics for 4 wiring and README.txt for details.
BUILDING A HOMEBREW QRP Among the guys I work, QRPs seem to be the most common homebrew project, second only to building antennas. Therefore this chapter describes a simple QRP design I have settled on. I use my QRPs as stand-alone transmitters or I use them to drive a final amplifier to produce higher power, 25 to 100 watts.
