The Sproutie MK II HF Regen Receiver | Dave Richards AA7EE edit / delete

A very impressive shortwave receiver, using an HRO-style tuning control, a regenerative frontend and a load of multistage audio filters.

to electronics ham hf radio receiver regen shortwave ... on 23 September 2015

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

Radio Channel292 International Broadcasting Shortwave Kurzwelle Rundfunk Sender Sendezeit - Home edit / delete

A group of German radio enthusiasts who bought one of the frequencies that Deutsche Welle used to use -- lots of pirate-inspired stuff on here. (Formerly "Radio 6150".)

to broadcast hf pirate radio shortwave ... on 14 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

mcHF QRP transceiver | Small and inexpensive homebrew HF radio edit / delete

Using SDR techniques but in a conventional integrated-radio form factor.

to ham hf qrp radio sdr ... on 25 May 2014

BBC RD - Publications - White Paper 132 : Dipole Antennas edit / delete

Excellent overview of dipoles and variations thereof (folded dipoles, cones, discones, etc.).

to antenna dipole electronics hf radio vhf ... on 08 March 2013

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...

to codec2 dv ham hf radio ... on 11 February 2013

STEVE - VK6HV edit / delete

Relatively simple HF amplifiers based on the 813.

to amp electronics hf radio ... on 30 March 2012

Dave GW4GTE`s website edit / delete

Simple, well-documented kits for 160m/80m AM. I like the PWM audio modulator using a SMPSU chip.

to am electronics hf mf radio ... on 30 March 2012

Aerial Analyser Details edit / delete

In terms of features, pretty much a DIY MFJ-259 -- but built entirely out of common components, and including source code for the microcontroller.

to amateur analyser antenna electronics hf radio test-equipment ... on 27 February 2012

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