project:hgg:antenna_design:jpole
Unterschiede
Hier werden die Unterschiede zwischen zwei Versionen angezeigt.
| Beide Seiten der vorigen RevisionVorhergehende ÜberarbeitungNächste Überarbeitung | Vorhergehende Überarbeitung | ||
| project:hgg:antenna_design:jpole [2011-12-30 00:52] – 85.177.80.33 | project:hgg:antenna_design:jpole [2012-01-01 16:35] (aktuell) – 92.250.254.221 | ||
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| Zeile 9: | Zeile 9: | ||
| * C = adjust to 50 Ω wave impedance between solder joints | * C = adjust to 50 Ω wave impedance between solder joints | ||
| * D = 4 turn balun to keep coax line from becoming part of the radiator | * D = 4 turn balun to keep coax line from becoming part of the radiator | ||
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| + | TODO | ||
| + | * describe how to fine-tune C | ||
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| + | * HAM Operators use SWR-Meters, these show the overlay-ratio between in- and out-flowing wave. | ||
| + | * An SWR ratio lower than 1:1.5 is ok. 1:1 is perfect | ||
| + | * Sadly you need an transmitter to use this methode (you may ask a nearby HAM) | ||
| + | * SWR-Meters for 2-meter/ | ||
| + | * The Cheap CB SWR-Meters are only useful for 11-Meter band | ||
| ===== How to tune ===== | ===== How to tune ===== | ||
| * Nibble away bits on both arms while maintaining the (3/4 λ) / (1/4 λ) ratio. | * Nibble away bits on both arms while maintaining the (3/4 λ) / (1/4 λ) ratio. | ||
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project/hgg/antenna_design/jpole.1325202732.txt.gz · Zuletzt geändert: 2011-12-30 00:52 von 85.177.80.33