AUTOMATIC TUNING ANOMALY..success when it should be fail

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  • Updated 3 years ago
I found an interesting anomaly with the ATU on my 6700.  The tuner will come up with "success" even with very high SWR.

1.  Using an antenna that has high SWR
2.  Click on ATU, the 6700 clicks a lot and ultimately says "fail"
3.  Click on TUNE which will show a high SWR
4.  Immediately click on ATU again, will click a bit and say "success"

Found this by accident when my flat top antenna developed a problem where the feedline froze in the rain gutter on our house while I was on vacation.
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K2CM

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Posted 3 years ago

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Robert -- N5IKD, Elmer

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I have seen the opposite happen, it will sometimes say fail, when the SWR is still usable. (well below the red area)
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Chuck

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Finally got around to removing my SGC remote tuner and using the 6500 ATU. I am experiencing pretty much the same thing. Tune reports a SWR of 2.0 and the ATU invoked reports fail.
This happens on 15 meters only.
yet I have a SWR of around 6 or 7 to 1 on 30 meters and it reports success.

Ticket time?

73
Chuck
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Tim - W4TME, Customer Experience Manager

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We addressed some of these issues in the upcoming SmartSDR v1.4 release.
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Chuck

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Thanks Tim,

Reply appreciated.

73
Chuck
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K2ERA

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Will ATU memories be coming soon?  Its really a pain to have to tune the antenna every single time I move bands.  Also it randomly remembers the last tune, sometimes it does, sometimes it doesnt, makes it easy to accidently transmit without tuning first.   ATU Memories IMHO are a must have feature.
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Norm - W7CK

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I should already know this but thought I would ask.  When using the internal tuner, is the receive in the tuning circuit as well as the transmit?   I know with some of the older non Flex rigs, the internal tuners were only in the circuit during transmit.
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Chuck

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Norm,
I see an improvement in RX after tuner is invoked.  I used a JT-65 signal which stays fairly constant (subject to band conditions) for 50 seconds. I tune away from the JT-65 signal so not as to interfere and note the difference in the panadapter.


73
Chuck
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Tim - W4TME, Customer Experience Manager

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"When using the internal tuner, is the receive in the tuning circuit as well as the transmit?"

Yes, it is.
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William Hemmingsen

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Yes I have noticed big improvements with receive after tuner is used.  When working a weaker station, I will tune as close as possible not to interfere, then I can visually see and hear a difference.  I'm not sure of the differences in tuners between the 6300 and the 6500/6700, but the tuner in the 6300 has impressed me.  Just wish it had memories.

W4WHL