- PA3EGU Magnetic Loop
- Magnetic Loop antenna for 20 to 80 meters band using home made butterfly condensator kit
[ Hits: 604 | Votes: 1 | Rating: 1.00 ]
- Magnetic Loop Antennas
- A complete guide to magnetic loop antenna construction, with analysis of multi-turn and single-turn magneti loops, and and insight on choosing the optimal capacitor, or homebrewing your own butterfly capacitor
[ Hits: 734 | Votes: 0 | Rating: 0.00 ]
- The Sunspot Cycle
- Sunspot Numbers, The Butterfly Diagram, the Greenwich sunspot data and sunspot realted infos.
[ Hits: 1959 | Votes: 3 | Rating: 6.67 ]
- Maunder's Butterfly Diagram
- How to understand when a new solar cycle starts.
At the beginning of a new solar cycle, sunspots tend to form at high latitudes, but as the cycle reaches a maximum the spots form at lower latitudes.
[ Hits: 1246 | Votes: 3 | Rating: 8.33 ]
- Homebrew Butterfly Capacitor
- Butterfly capacitors are hard to find, expensive but they can be home made by PY1AHD
[ Hits: 3798 | Votes: 12 | Rating: 5.58 ]
- AVR Butterfly Keyer
- The Atmel AVR Butterfly is a credit card sized board which contains an AVR MEGA169 processor, a six character LCD display, a five way joystick navigation switch, a piezo speaker, a 3 volt lithium battery cell for power and a few other odds and ends.
[ Hits: 511 | Votes: 0 | Rating: 0.00 ]
- KD1JV Digital SWR / Power Meter
- This small, light weight digital SWR and power meter uses an Atmel AVR Butterfly demo board and a Stockton type directional coupler.
[ Hits: 1224 | Votes: 3 | Rating: 4.00 ]
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