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glebo · 08-26-2012, 05:04

As SF BHT stated.."cutting" is just a term. You just measure the calculated length and roll-unroll how much wire is needed.

Also, a "rule of thumb" is to take a foot off each end of a resonant antenna (one cut to frequency) to compensate for "end effect", it helps reduce feed point impedence.

That kit is pretty good, I saw one the other day out at the commo committee, they are in dire need of new antenna kits, because the old SORAK kits have seen their day.

The kit comes with two BALUNS, one for resonant antennas (ratio suites 1/2 wave feed point impedences, I believe it may be a 1:1.5 or 1:2 ratio) and one for non-resonant (terminated long wires/sloping "V"'s etc), I believe that one is in the neighborhood of 9:1 to match feed point impedences of long wire antennas.

Just make sure you use the right BALUN for the system you are construcing, IE resonant (cut to freq) or non-resonant (multi-freq terminated with a resistor) and you'll be good to go.

Good luck..

ETA, I was just at Campbell for 4 days to visit my son, I didn't have internet or I would've looked you up...ooops.

08-26-2012, 05:04	#5
glebo Quiet Professional Join Date: Jun 2007 Location: Hope Mills, NC Posts: 2,830	As SF BHT stated.."cutting" is just a term. You just measure the calculated length and roll-unroll how much wire is needed. Also, a "rule of thumb" is to take a foot off each end of a resonant antenna (one cut to frequency) to compensate for "end effect", it helps reduce feed point impedence. That kit is pretty good, I saw one the other day out at the commo committee, they are in dire need of new antenna kits, because the old SORAK kits have seen their day. The kit comes with two BALUNS, one for resonant antennas (ratio suites 1/2 wave feed point impedences, I believe it may be a 1:1.5 or 1:2 ratio) and one for non-resonant (terminated long wires/sloping "V"'s etc), I believe that one is in the neighborhood of 9:1 to match feed point impedences of long wire antennas. Just make sure you use the right BALUN for the system you are construcing, IE resonant (cut to freq) or non-resonant (multi-freq terminated with a resistor) and you'll be good to go. Good luck.. ETA, I was just at Campbell for 4 days to visit my son, I didn't have internet or I would've looked you up...ooops. __________________ Out of all the places I've been, this is one of'em.... You haven't lived...until you've almost died... Last edited by glebo; 08-26-2012 at 05:07.
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