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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.
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...
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
Welcome to the PA3CSG website! edit / delete
Big RF amplifiers with cheap Russian valves, and serious filters for them.
to amateur amplifier electronics hf radio rf valve vhf ... on 27 February 2012
Ten Dollar Miracle Whip Clone edit / delete
Neat idea for an adjustable inductor: modify a wirewound pot.
to antenna electronics hf radio ... on 27 February 2012
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| - hf | |
| 11 | + aerial |
| 1 | + am |
| 17 | + amateur |
| 2 | + amp |
| 4 | + amplifier |
| 1 | + analyser |
| 8 | + antenna |
| 1 | + balun |
| 2 | + beacon |
| 2 | + broadcast |
| 4 | + cb |
| 1 | + codec2 |
| 1 | + coil |
| 2 | + digimodes |
| 1 | + dipole |
| 1 | + dv |
| 8 | + eh |
| 18 | + electronics |
| 1 | + filter |
| 6 | + ham |
| 1 | + inductor |
| 5 | + isotron |
| 2 | + linear |
| 2 | + lpf |
| 1 | + mechanica |
| 1 | + mf |
| 1 | + microcontroller |
| 3 | + microvert |
| 1 | + mixer |
| 1 | + modelling |
| 1 | + obviously |
| 1 | + packet |
| 3 | + pirate |
| 1 | + propagation |
| 1 | + psk |
| 1 | + qrp |
| 43 | + radio |
| 2 | + receiver |
| 1 | + regen |
| 1 | + retrotech |
| 1 | + review |
| 3 | + rf |
| 4 | + sdr |
| 1 | + shopping |
| 5 | + shortwave |
| 11 | + small-aerial |
| 1 | + spice |
| 1 | + ssb |
| 3 | + swl |
| 1 | + test-equipment |
| 1 | + transceiver |
| 1 | + transmitter |
| 1 | + uhf |
| 1 | + valve |
| 5 | + vhf |
| 1 | + windom |
tasty by Adam Sampson.