Coax traps

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Links

http://www.arrl.org/qex/Mueller.pdf

http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/CoaxTrap.htm

http://www.zerobeat.net/G4FGQ/page3.html

http://www.qsl.net/ve6yp/index.html

Her er programmet til beregning af coax-traps

http://www.qsl.net/ve6yp/coaxtrap.zip

eller her KLIK

20 - 40 - 80 m dipole using coax traps

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5,6 m          2,9m            5m       Feed       5m            2,9m          5,6 m

These aprox. lengths where used with feedpoint at 6m height.

At 11m height aprox 1m has to be added at the (80m)ends

Using RG58CU you can use the table below.

Freq Form Ø Turns Turn Sens kHz/cm End Sens kHz/cm. L in uH
7,1Mhz 30mm 14.9 50kHz/cm. 21kHz/cm. 3uH
14.2MHz 30mm 8 193kHz/cm. 77kHz/cm. 1,4uH
7,1Mhz 40mm 10.9 54.7kHz/cm. 22.4kHz/cm. 3,1uH
14.2MHz 40mm 6 206.7kHz/cm. 80kHz/cm. 1,4uH
7,1Mhz 50mm 8.6 58kHz/cm. 23kHz/cm. 3,2uH
14.2MHz 50mm 4,8 214khz/cm. 80kHz/cm. 1.4uH
7,1Mhz 75mm 5,8 62kHz/cm. 23kHz/cm. 3,3uH
14.2MHz 75mm 3,4 219kHz/cm 78kHz/cm. 1,4uH