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David Knight. Radio, electrical and electronic articles. edit / delete
Impressive section on adding an all-mode converter to an RA17, and an excellent description of the guts of one of the common SGC* autotuners.
to antenna electronics ra17 radio retrotech transverter tuner ... on 30 March 2012
W3EEE - Mt. Gretna, PA, U.S.A edit / delete
I found this originally for the Codar AT5 (a very cute 160m/80m transmitter), but there's lots of interesting stuff on LF radio here, and some good advice on receive antennas.
to am antenna electronics lf radio transmitter ... 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
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
Small Magnetic Receiving Loops edit / delete
Useful description of shielding techniques.
Home - Aerial Parts edit / delete
Small quantities of bits for making aerials, by mail order.
to antenna electronics radio shopping ... on 23 August 2011
David Jefferies's navigation page. edit / delete
Antenna design, complex systems, and potential student projects.
to antenna complex-systems complexity electronics projects simulation teaching ... on 14 July 2011
Voltage Probe Antenna (VPA) Design 5 kHz to 500 MHz edit / delete
Very similar to the PA0RDT active antenna. I'm now not surprised that mine works so well for FM broadcast reception! This has an excellent discussion of the design.
to antenna electronics pa0rdt probe radio ... on 14 July 2011
Notable for the bit on slot antennas. (The three-band J-pole-with-slots combo is pretty neat, although I'm not entirely sure I'd want it on the roof!)
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tasty by Adam Sampson.