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Velocity Factor of Coax
"Howard Kowall" wrote in message ... hello all thanks all who read and emailed back lot of good info came in and I have a good handle on it I am building this antenna for rhcp portable satellite antenna for LEO Ham Radio Sat thanks again Howard "Howard Kowall" wrote in message ... Hello all What determines the Velocity Factor of a coax cable. Is it the center conductor awg,dielectric,shield or all combined I am building a Lindenblad Antenna for 2 Meters its asked to use RG-59 polyethylene foam coax with stranded center conductor I think the VF is .66 I cant find any stranded center cond where I am,so I want to try it with Solid,but it seems all the solid is VF .88 anyone have any input on this thanx howard Hi Howard The Lindenblad has an overhead null that you might find anoying for some high elevation passes of LEOs. Are you open to trying to build a DCA (which is an antenna that I developed)? I make the claim that there is no other hemispheric coverage antenna design that performs better than a DCA. But, I sure am open to being corrected. The Feb 2008 QST contains an article on the DCA antenna design concept. It is my claim that a DCA is extreemely forgiving of construction errors and uses 4 wire dipoles and 50 ohm coax with 5 RFI type ferrites as "baluns'. Jerry KD6JDJ |
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