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#14
July 2nd 03, 03:48 PM
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N8KDV wrote: -=jd=- wrote: On 02 Jul 2003, N8KDV sneezed on the keyboard, resulting in: -=jd=- wrote: ...snip... So I'm wondering if a balun is a waste of time on a random wire for SWL only. At least, in the case of Joe Listener just sticking a length of wire up - not in the case of big beverages or some other "formal" (lack of a better word) antenna rig... Are you sure you have the balun/matching transformer wired and connected properly? I'm fairly confident that I do, but I can't say it is exact. I'd like to examine a known good one before I would hazard claiming I got it 100% right. I know I have the leads absolutely correct, as per the design in (http://www.hard-core-dx.com/nordicdx/antenna/feed/9_ 1balun.html). The only question is in the wraps. They are done neatly and do not overlap. It took me a few tries to get the wraps on like I wanted - evenly spaced, no overlap, snug against the choke... However, depending on how you count the wraps, I have either (30)  10) wraps -or- (30-1/2)10-1/2) wraps. I have no idea ifthat would make a difference and would defer to the groups advice. Err... I also don't know if this makes any difference either, but I used the square ferrite choke from Radio Shack, as I could not find a round one anywhere locally. Ah... therein may lie the problem... as much as people have argued with me in the past about this, I can only say that all ferrite cores are not created equal... Not sure whether you've read this article or not: http://members.aol.com/DXerCapeCod/z_transformers.pdf I do appreciate the feedback! Thanks, JD |
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