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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