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A fellow ham recently acquired a TS-480SAT. His working condition is complemented by an inverted-vee for the 20m band around 10m above ground; solid 59+ reports. Trying to tune the same antenna on other bands using the in-built tuner fails outright.

I'm curious; what range of mismatch can the internal tuner on the 480SAT accommodate?

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Oddly, the range is not mentioned in the manual. Discussion about the feature on the web seems to agree that it's limited to a 3:1 match. That's sounds right as that is a pretty common figure for internal tuners from other manufacturers.

If you can borrow him an SWR meter to test the unit, he could verify that figure empirically pretty easily.

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  • $\begingroup$ Ah. Right. I forgot to mention we looked for it in the manual ... /+: There isn't a meter at hand $\endgroup$ – VU2NHW Dec 18 '13 at 16:18
  • $\begingroup$ Yeah, well, it's safe to say the match is worse than 3:1 if the tuner fails. That antenna should tune up on 40m at better than 3:1 unless it's really low to the ground. $\endgroup$ – WPrecht Dec 18 '13 at 16:27

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