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Minima -A general coverage transceiver
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
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
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
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
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
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
Whistable-based radio enthusiast. The section on his LF gear is interesting -- using an audio amplifier as a PA.
New home of projects like Das DereLicht.
to amateur electronics radio retrotech surplus ... on 25 November 2012
Dokumentationsarchiv Funk (QSL Collection)
The descendant of Radio Austria's archive. (Jonathan Marks has some videos of their collections.)
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| - amateur | |
| 1 | 4m |
| 1 | 6m |
| 11 | aerial |
| 59 | amateur |
| 1 | amp |
| 5 | amplifier |
| 2 | amusements |
| 1 | analyser |
| 3 | antenna |
| 1 | aprs |
| 1 | arm |
| 1 | atv |
| 1 | audio |
| 1 | ax24 |
| 2 | ax25 |
| 1 | baofeng |
| 3 | beacon |
| 4 | cb |
| 1 | china |
| 1 | codec |
| 1 | coil |
| 1 | compression |
| 1 | digimodes |
| 1 | digital |
| 1 | echolink |
| 8 | eh |
| 29 | electronics |
| 1 | eme |
| 1 | filter |
| 1 | gps |
| 1 | hellschreiber |
| 17 | hf |
| 1 | history |
| 1 | inductor |
| 5 | isotron |
| 4 | kits |
| 1 | led |
| 2 | lf |
| 1 | light |
| 1 | loop |
| 2 | lpf |
| 1 | mechanica |
| 1 | mf |
| 3 | microcontroller |
| 3 | microvert |
| 2 | microwave |
| 1 | mixer |
| 1 | mkars80 |
| 1 | mobile |
| 1 | modelling |
| 2 | modem |
| 1 | nbtv |
| 1 | optoelectronics |
| 7 | packet |
| 1 | phreaking |
| 1 | psk |
| 1 | psk31 |
| 1 | psu |
| 6 | qrp |
| 59 | radio |
| 1 | raspberry-pi |
| 1 | repeater |
| 1 | retrocomputing |
| 4 | retrotech |
| 1 | reverse-engineering |
| 2 | rf |
| 1 | satellite |
| 1 | shopping |
| 1 | shortwave |
| 1 | sinclair |
| 11 | small-aerial |
| 3 | software |
| 1 | spectrum |
| 1 | spice |
| 1 | ssb |
| 1 | sstv |
| 1 | surplus |
| 1 | test-equipment |
| 2 | to-package |
| 1 | transceiver |
| 2 | transmitter |
| 2 | tv |
| 1 | uhf |
| 1 | uv3r |
| 1 | uv5r |
| 1 | valve |
| 6 | vhf |
| 1 | video |
| 1 | weather |
| 1 | wspr |
tasty by Adam Sampson.