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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
Neat idea for an adjustable inductor: modify a wirewound pot.
to antenna electronics hf radio ... on 27 February 2012
Small Magnetic Receiving Loops
Useful description of shielding techniques.
Small quantities of bits for making aerials, by mail order.
to antenna electronics radio shopping ... on 23 August 2011
David Jefferies's navigation page.
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
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!)
Multiband HF Center-Loaded Off-Center-Fed Dipole (or Windom) Antenna - HAMwaves.com
Taking the Windom idea a bit further with traps. Neat, and good description.
Assorted radio projects; the page on measuring balun loss is good.
« earlier | later » Page 2 of 7
| - antenna | |
| 2 | 2m |
| 2 | 70cm |
| 1 | ace |
| 2 | active |
| 7 | aerial |
| 1 | am |
| 3 | amateur |
| 1 | analyser |
| 68 | antenna |
| 2 | atu |
| 1 | atv |
| 1 | audio |
| 1 | balun |
| 1 | capacitor |
| 1 | cb |
| 1 | complex-systems |
| 1 | complexity |
| 1 | compression |
| 1 | computer |
| 1 | dipole |
| 1 | dundee |
| 1 | ecl |
| 43 | electronics |
| 1 | feedline |
| 34 | ham |
| 8 | hf |
| 2 | history |
| 1 | kite |
| 1 | lband |
| 2 | lf |
| 11 | loop |
| 1 | microvert |
| 1 | microwave |
| 3 | miniwhip |
| 1 | pa0rdt |
| 1 | pc |
| 2 | physics |
| 1 | probe |
| 1 | projects |
| 1 | qrp |
| 1 | ra17 |
| 65 | radio |
| 1 | radiosonde |
| 1 | receiver |
| 1 | reflector |
| 2 | retrocomputing |
| 4 | retrotech |
| 1 | reverse-engineering |
| 2 | rf |
| 2 | rockloop |
| 1 | satellite |
| 3 | shopping |
| 1 | simulation |
| 3 | software |
| 1 | surplus |
| 1 | teaching |
| 3 | test-equipment |
| 2 | to-package |
| 1 | transmitter |
| 1 | transverter |
| 1 | ttl |
| 1 | tuner |
| 2 | uhf |
| 1 | vectrex |
| 4 | vhf |
| 1 | vna |
| 1 | wifi |
| 1 | windom |
| 1 | ww2 |
| 1 | zx80 |
tasty by Adam Sampson.