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"JIMMIE" wrote in message oups.com... snip One thing that concerned me even after the antenna was working is the SWR appeared to be a little too good. It was 1.2:1 in the middle of 10 meters and never got ave 1.7:1 even at the band edges. I thought that this is a little too good to be true.. My concern, too, for the same reason but the readings appear to be authentic. For check, I tried the modified antenna (coax not running through the lower element) on a few other bands with very, very low power and got terrible VSWR readings. I get about a 1.4:1 at the low end of the 10 band, dropping to a 1.1:1 near the top of the band. I believe having big, fat elements helps. Due to cable loss, my measured VSWR at the transceiver is a skosh better than what I would see at the antenna. A nice chart in the ARRL Antenna Book shows that with 1 dB cable loss (approximate for 100' of RG-8), my 1.4:1 VSWR measured at the radio is actually closer to 1.6 at the antenna. Still a keeper. I went on the air last night with a few watts and got a great signal report from a local ham, so the antenna is working. "Sal" (KD6VKW /AE) |
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