The above 7 Mhz 5 Watts CW Transmitter circuit was found in one of back issues of sprat. Still i am wondering how 5 watts juiced out from this tiny crystal oscillator circuit. This classic 7 MHz CW Transmitter circuit demonstrates how effective amateur radio equipment can be built with minimal components and straightforward design […]
QRP
The QRP section is dedicated to low‑power HF and VHF operating, with a heavy focus on simple transmitters, minimalist transceivers, and practical on‑air results. Here you’ll find classic designs like the Mighty Mite, OXO transmitter, Mosquito TRX, and modern SDR‑based rigs such as sBitx and ZBitx tuned for portable use, all built around parts that are easy to source and experiment with. Articles emphasise repeatable circuits, clean keying, stable oscillators, and output filters so that your 1–5 W signal is both efficient and pleasant to copy at the other end
Circuits – 7MHz CW / AM QRP Transmitter
Build a versatile 7MHz QRP Transmitter capable of both CW and AM modulation. This DIY guide features a stable 40-meter crystal oscillator, a class-C power amplifier, and simple switching for dual-mode amateur radio operation.
Video – Belgaum net in 7050 khz
Belgaum net in 7050 khz Monitored in my GEK 2X HF Transceiver at my krishnagiri qth. The Belgaum Net on 7.050 MHz is one of the popular morning HF amateur radio nets in India, operating alongside other well-known nets like the Charminar Net on 7.080 MHz. These nets typically run during the early morning […]
Video – ubitx3 with nextion display
ubitx3 with nextion display Demo of ubitx3 with nextion display reception in my shack. The uBITX v3, developed by Farhan VU2ESE, serves as an excellent foundation for this upgrade. Built around the Arduino Nano platform, this QRP transceiver covers all HF amateur bands from 80 to 10 meters with approximately 10 watts output power. The […]
Video – Reception test of my ubitx v3 with nextion 2.8 inch screen
ubitx3 with nextion screen Reception test of my ubitx v3 multiband SSB Transceiver with Nextion 2.8 inch touch screen. Barbaros WB2CBA has modified his stock µBITx v6 kit to use the Nextion 2.8″ TFT LCD display.To help his fellow Ubitx V6 owners who want to use a nextion display in their rig, Barbaros has provided […]
Video – GEK 2X SSB Transceiver receiving BCDXNET
The GEK 2x SSB Transceiver is a Mid range high performance Low-noise, low cost SSB HF transceiver. The local oscillator is stable DDS VFO and DDS BFO/Carriers oscillator. The Power amplifier is designed as a push-pull Mitsubishi the latest generation of 12V-30MHz Silicon MOSFET Power Transistor. The RD06HHF1 is used in the pre driver and […]
Do it yourself Shortwave Transmitter circuit
This Shortwave Transmitter circuit operates in shortwave HF band (6 MHz to15 MHz), and can be used for short range communication and for educational purposes. The Shortwave Transmitter circuit consists of a mic amplifier, a variable frequency oscillator, and modulation amplifier stages. Transistor T1 (BF195) is used as a simple RF oscillator. Resistors R6 and […]