I shortened the coax cable on my car's 477MHz CB antenna because the braid was frayed at the transciever connector end, and a metre or so of spare coax was coiled up behind the dash. I thought if I cut the coax shorter, I would remove a little cable loss.

I measured SWR with a meter before and after: Before was 1.3:1, after 1.7:1. This seems quite a bit worse. I don't know how much this will affect performance.

I think I assembled the new connector pretty well, good solder joints to centre and braid.

Could my antenna setup be sensitive to the length of the coax? I have not heard of tuned lengths but my understanding of antenna and feeds is limited.

My vehicle's antenna is mounted at the front, it has a short solid base tube with a standard threaded mount onto which I fitted a 60cm 4.5dBi whip (the original antenna was missing). I don't know exactly what the antenna mount is but it looks similar to this one.

I'd like to understand what has happened, if I have significantly affected the performance of my antenna system, and how I might be able to fix it if so (splice the cut part of the coax back on?)


Question: How to hide a DIV element when I click outside
Answer: try .blur(), and like this:

$('#mydiv').blur(function(e) {
    $(this).fadeOut(300);
});


Hope it help