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Amplitude Demodulating BPSK31 | Analog Zoo edit / delete
Since PSK31 is both phase- and amplitude-modulated, you can completely ignore the phase modulation and just envelope-detect it!
to digital-modes electronics ham modulation psk31 radio ... on 03 January 2015
My Hobbies: Met Balloon Hunting | RF Head – HAB & Ham Radio Experimentation edit / delete
"Every 6 hours (0,6,12,18 UTC), the Bureau of Meteorology (the BOM), launch a weather balloon. Where they land depends on mainly on atmospheric wind conditions at the time of launch. Some days, I'm out chasing them."
to ham radio radiosonde rdf rf ... on 28 May 2014
mcHF QRP transceiver | Small and inexpensive homebrew HF radio edit / delete
Using SDR techniques but in a conventional integrated-radio form factor.
FreeDV | HomePage edit / delete
Digital voice mode based on codec2. Must have a play with this at some point, although I think the chances of me hearing anything are slim...
The original transistor-on-a-four-pole-switch transceiver.
to electronics fet ham radio reflex ... on 27 February 2012
30m BAND UTILIZATION -- G3NRW edit / delete
Good visualisation.
Neat two-control ATU design. Making a better variable inductor (than I've currently got) would be the challenge -- note the wiper-on-toroid and variometer designs on this page... and also the air-cored coils at the bottom.
to antenna atu electronics ham radio ... on 06 May 2011
Open source EchoLink server and client.
GQRP Club - Low Power Amateur Radio edit / delete
The GQRP guide to low-pass filter design. I need to order some bigger toroids.
to electronics filter ham lpf radio ... on 02 April 2011
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tasty by Adam Sampson.