KPA1500 in the IARU Contest Last weekend
Posted by
Elecraft mailing list on
Jul 15, 2020; 3:43pm
URL: http://elecraft.85.s1.nabble.com/KPA1500-in-the-IARU-Contest-Last-weekend-tp7663146.html
A correspondent asked me why I needed to tune a resonant antenna.
The reason was because although the Yagi was tuned to resonate at about 7.130MHz it unfortunately has a rather narrow bandwidth. I needed to operate SSB in this contest in ITU Region 1 SSB, which is between 7.080MHz and 7.200MHZ. At 7.080MHz the SWR (with tuner bypassed) was 1.75:1 & at 7.200 was 1.95:1. I would be operating at power so I preferred to tune for 1.1:1.
Yes I know the Yagi is not very good with that narrow bandwidth, but it is what it is. Normally I operate CW only on 40M & tune it to 7.030 with the bandwidth covering the preferred Region 1 CW portion of the band ie7.000 to 7.040 and the tuner is not needed.
73 Ray G3XLG
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