Category Archives: QRP

A Fully Featured, Fifty Dollar QRP Radio

QRP radio operators try to get maximum range out of minimal power. This term comes from the QRP Q-code, which means “reduce power.” For years, people have built some very low-cost radios for this purpose. Perhaps the best known QRP kit is the Pixie, which can be found for less than $3 on eBay.

The QRX is a new DIY QRP radio kit from QRP Labs. Unlike the Pixie, it has a long list of features. The QRX operates on the 80, 60, 40, 30, 20, or 17 meter bands at up to 5W output power. The display provides tuning …read more

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Posted in amateur radio, atmega328p, QRP, QRP Labs, radio hacks, Si5351A | Leave a comment

Scribble Your Way To Quick Printed Circuit Boards

There are a variety of techniques employed by electronic constructors seeking the convenience of a printed circuit board without the inconvenience of making a printed circuit board. Dead bug style construction in which the components float on a spiders-web of soldered leads above a ground plane is one, Manhattan style construction in which pads made from small cut squares of bare copper-clad PCB are glued on top of a groundplane is another.

[Freestate QRP] has another take on this type of electronics, with what he calls “Scribble style” construction. He cuts away copper from bare board to create pads and …read more

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Posted in dead bug construction, homebrew, manhattan construction, misc hacks, QRP, radio hacks | Leave a comment

Looking Back at QRP Transmitters

When you get to a certain age, you get unsettled by people calling “your” music oldies. That’s how a few of us felt when we saw [Mikrowave1’s] video about Retro QRP – Solid Gold Years (see below). “QRP” is the ham radio term for low power operation, and the “solid gold” years in question are the 1960s to 1980. The videox has some good stuff, including some old books and some analysis of a popular one-transistor design from that time. He even tries a few different period transistors to see which works best.

[Mikrowave1] talks about the construction techniques used …read more

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Posted in amateur radio, arc-5, command receiver, ham radio, low power, QRP, radio hacks, vintage | Leave a comment