Minima -A general coverage transceiver edit / delete

From the designer of the BITX transceiver: a multiband SSB radio built from common parts with clever use of a microcontroller. The mixer design is particularly neat.

to amateur amplifier electronics hf lpf microcontroller mixer radio ssb transceiver ... on 22 March 2015

Filters - OpenRadioMiniconf edit / delete

Building HF transmitter filters using air-cored coils, wound on a pencil. This is surprisingly effective!

to amateur coil electronics filter hf inductor lpf radio transmitter ... on 14 March 2015

HellZXcreiber • Hackaday Projects edit / delete

Hellschreiber receiver for the Spectrum, using the tape interface. Presumably you could do a transmitter as well with minimal hardware...

to amateur hellschreiber radio retrocomputing sinclair spectrum ... on 27 April 2014

Baofeng Radios edit / delete

More specifically: reverse engineering the UV-3R and UV-5R. Apparently it's pretty easy to reprogram the 3R's microcontroller, and they're both based on an I2C-controlled single-chip transceiver, so are eminently suitable for rebuilding for other applications.

to amateur baofeng microcontroller radio reverse-engineering uv3r uv5r ... on 27 March 2013

windytan/slowrx · GitHub edit / delete

A new SSTV decoder. I should hook this up to my SDR stuff (which might mean adding JACK support).

to amateur radio software sstv to-package ... on 24 March 2013

threeme3/WsprryPi · GitHub edit / delete

WSPR beacon done in software using a GPIO pin on the Raspberry Pi.

to amateur arm beacon radio raspberry-pi wspr ... on 24 March 2013

G4AYT edit / delete

Whistable-based radio enthusiast. The section on his LF gear is interesting -- using an audio amplifier as a PA.

to 6m amateur lf radio tv vhf ... on 19 March 2013

AA1TJ edit / delete

New home of projects like Das DereLicht.

to amateur electronics radio retrotech surplus ... on 25 November 2012

Dokumentationsarchiv Funk (QSL Collection) edit / delete

The descendant of Radio Austria's archive. (Jonathan Marks has some videos of their collections.)

to amateur history radio shortwave ... on 25 November 2012

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