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?


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.

  • $\begingroup$ 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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