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I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna.
?
I use the LDG AT-100ProII autotuner
?
When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button.
?
What I don't understand is why I seem to have to do this with every band switch (or move up/down the band).
?
Is there a solution to this?
?
73,
Ken
KN2D
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Is this new behavior?? I mean, your antenna needs to be “re-matched” to your radio when you change bands, or make large frequency changes in the same band.? Is your tuner in full auto mode?? Sounds to me like it’s operating as it should.? Perhaps I’m missing something. ? 73, Ken, KJ9B ?
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From: [email protected] <[email protected]> On Behalf Of Ken KN2D via groups.io
Sent: Sunday, March 30, 2025 09:08
To: [email protected]
Subject: [ldgelectronics] Why do I have to continually retune my radio?? [Edited Message Follows] I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna. I use the LDG AT-100ProII autotuner When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button. What I don't understand is why I seem to have to do this with every band switch (or move up/down the band). Is there a solution to this?
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Hey Ken,?
I had to take it off full automatic tune mode because?when on SSB it was trying to autotune while transmitting and my audio was interrupted by the relay chattering to tune the radio.
I was under the impression that settings were saved and that retuning wasn't necessary.
Was I wrong?
73, Ken KN2D CW Ops #3566
Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? Let's chat!
On Sun, Mar 30, 2025 at 10:51?AM Kenneth Bandy via <ken.kj9b= [email protected]> wrote: Is this new behavior?? I mean, your antenna needs to be “re-matched” to your radio when you change bands, or make large frequency changes in the same band.? Is your tuner in full auto mode?? Sounds to me like it’s operating as it should.? Perhaps I’m missing something. ? 73, Ken, KJ9B ? ? [Edited Message Follows] I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna. I use the LDG AT-100ProII autotuner When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button. What I don't understand is why I seem to have to do this with every band switch (or move up/down the band). Is there a solution to this?
|
The setting are saved but if you are on manual you will have to
hit the tune button to get it to retune to the correct saved
setting.? The memory tune is almost instantaneous when you start
transmitting vs a full tune which takes a couple of seconds.
If it was trying to retune constantly on SSB you need to look for
RF in the shack.? Once it has a tune it should be rock steady.
Leonard K. Pennock
AD7AS
Those who walk bravely through life, unafraid of loss or failure,
find that they very rarely lose or fail.
On 3/30/25 10:17 AM, Ken KN2D via
groups.io wrote:
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Show quoted text
Hey Ken,?
I had to take it off full
automatic tune mode because?when on SSB it was trying to
autotune while transmitting and my audio was interrupted by
the relay chattering to tune the radio.
I was under the impression that settings were
saved and that retuning wasn't necessary.
Was I wrong?
73,
Ken
KN2D
CW Ops
#3566
Constant Contact's Top
Trainer/Partner
Try Constant Contact free for 30
days by going to
Need help with email marketing?
Let's chat!
On Sun, Mar 30, 2025 at
10:51?AM Kenneth Bandy via <ken.kj9b= [email protected]>
wrote:
Is
this new behavior?? I mean, your antenna needs to be
“re-matched” to your radio when you change bands, or
make large frequency changes in the same band.? Is
your tuner in full auto mode?? Sounds to me like
it’s operating as it should.? Perhaps I’m missing
something.
?
73,
Ken,
KJ9B
?
?
[Edited Message Follows]
I noticed this weekend when I was
changing bands or frequencies on a band that my SWR
would go up, even though the day before (or earlier
on the same day), I had tuned my rig/antenna.
I use the LDG AT-100ProII
autotuner
When using SSB,?I wind up setting
fldigi to AM to get a carrier and hit the tune
button.
What I don't understand is why I
seem to have to do this with every band switch (or
move up/down the band).
Is there a solution to this?
|
Hi Ken (nice name).? I too have disabled full auto mode on my LDG tuners because of unexpected tuning.? My understanding is the settings are saved; however you need initiate a tune cycle to make the match.? A tune cycle where a match has been memorized should only take a second or two with no major “chattering” of relays.? Perhaps you are holding the “tune” button on the tuner for over 2.5 seconds.? According to the manual, holding the “tune” button over 2.5 seconds initiates a full tune cycle, regardless of if the frequency has been memorized or not. ? 73, Ken, KJ9B ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Ken KN2D via groups.io
Sent: Sunday, March 30, 2025 13:18
To: [email protected]
Subject: Re: [ldgelectronics] Why do I have to continually retune my radio?? I had to take it off full automatic tune mode because?when on SSB it was trying to autotune while transmitting and my audio was interrupted by the relay chattering to tune the radio. I was under the impression that settings were saved and that retuning wasn't necessary. 73, CW Ops #3566 ? Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? ? ? On Sun, Mar 30, 2025 at 10:51?AM Kenneth Bandy via <ken.kj9b=[email protected]> wrote: Is this new behavior?? I mean, your antenna needs to be “re-matched” to your radio when you change bands, or make large frequency changes in the same band.? Is your tuner in full auto mode?? Sounds to me like it’s operating as it should.? Perhaps I’m missing something. ? 73, Ken, KJ9B ? ? [Edited Message Follows] I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna. I use the LDG AT-100ProII autotuner When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button. What I don't understand is why I seem to have to do this with every band switch (or move up/down the band). Is there a solution to this?
|
Thanks, Leonard! 73, Ken KN2D CW Ops #3566
Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? Let's chat!
On Sun, Mar 30, 2025 at 2:00?PM Leonard K. Pennock via <leonardpennock= [email protected]> wrote:
The setting are saved but if you are on manual you will have to
hit the tune button to get it to retune to the correct saved
setting.? The memory tune is almost instantaneous when you start
transmitting vs a full tune which takes a couple of seconds.
If it was trying to retune constantly on SSB you need to look for
RF in the shack.? Once it has a tune it should be rock steady.
Leonard K. Pennock
AD7AS
Those who walk bravely through life, unafraid of loss or failure,
find that they very rarely lose or fail.
On 3/30/25 10:17 AM, Ken KN2D via
wrote:
Hey Ken,?
I had to take it off full
automatic tune mode because?when on SSB it was trying to
autotune while transmitting and my audio was interrupted by
the relay chattering to tune the radio.
I was under the impression that settings were
saved and that retuning wasn't necessary.
Was I wrong?
73,
Ken
KN2D
CW Ops
#3566
Constant Contact's Top
Trainer/Partner
Try Constant Contact free for 30
days by going to
Need help with email marketing?
Let's chat!
On Sun, Mar 30, 2025 at
10:51?AM Kenneth Bandy via <ken.kj9b= [email protected]>
wrote:
Is
this new behavior?? I mean, your antenna needs to be
“re-matched” to your radio when you change bands, or
make large frequency changes in the same band.? Is
your tuner in full auto mode?? Sounds to me like
it’s operating as it should.? Perhaps I’m missing
something.
?
73,
Ken,
KJ9B
?
?
[Edited Message Follows]
I noticed this weekend when I was
changing bands or frequencies on a band that my SWR
would go up, even though the day before (or earlier
on the same day), I had tuned my rig/antenna.
I use the LDG AT-100ProII
autotuner
When using SSB,?I wind up setting
fldigi to AM to get a carrier and hit the tune
button.
What I don't understand is why I
seem to have to do this with every band switch (or
move up/down the band).
Is there a solution to this?
|
With regards to the RF in the shack post, see if it happens with a lower power level. If not, it may be time for some ferrites.
Mike N3PM
|
What kind of antenna? If the antenna and tuner worked previously and is acting up now I would look at the antenna instead of the tuner.
I have seen a lot of problems with end fed antennas with matching baluns at the feed end that have the ferrite cores bad from overheating. This usually happens after operating for a while, and usually on a data mode and not as often on voice SSB.
As a result I don't use the multiband End Fed Half Wave antennas, but rather a long wire with the tuner located remotely at the antenna feed point in a protective box. This way the coax feed has a low SWR and low loss and the match to the long wire is made without additional matching networks.
All of that said some people have had good results with the EFHW antennas (and some don't). Most of those that have had problems have radios that will aggressively reduce power if the SWR goes too high, many of the IC-7100 radios. The love their antennas, however and some have sold their IC-7100s thinking that the radio was bad, no matter the diagnosis.?
Anyway check the SWR of the antenna before the tuner if possible as there may be something changing the tuning parameters that the tuner may be chasing.
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Ken, If your antenna includes a balun or unun, it may be getting warm after a while.?
|
Hi J.D.,
I use both a G5RV and a multiband dipole.,
I suspect it has to do with the automatic vs. semi-automatic use of the tuner.
I appreciate?your guidance!
73, Ken KN2D CW Ops #3566
Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? Let's chat!
On Mon, Mar 31, 2025 at 9:25?AM J.D. Barron via <jeter.d.barron= [email protected]> wrote: What kind of antenna? If the antenna and tuner worked previously and is acting up now I would look at the antenna instead of the tuner.
I have seen a lot of problems with end fed antennas with matching baluns at the feed end that have the ferrite cores bad from overheating. This usually happens after operating for a while, and usually on a data mode and not as often on voice SSB.
As a result I don't use the multiband End Fed Half Wave antennas, but rather a long wire with the tuner located remotely at the antenna feed point in a protective box. This way the coax feed has a low SWR and low loss and the match to the long wire is made without additional matching networks.
All of that said some people have had good results with the EFHW antennas (and some don't). Most of those that have had problems have radios that will aggressively reduce power if the SWR goes too high, many of the IC-7100 radios. The love their antennas, however and some have sold their IC-7100s thinking that the radio was bad, no matter the diagnosis.?
Anyway check the SWR of the antenna before the tuner if possible as there may be something changing the tuning parameters that the tuner may be chasing.
|
Thanks, Ken!
I think the long press is part of what's going on.
Will pay closer attention to that.
73, Ken KN2D CW Ops #3566
Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? Let's chat!
On Sun, Mar 30, 2025 at 2:24?PM Kenneth Bandy via <ken.kj9b= [email protected]> wrote: Hi Ken (nice name).? I too have disabled full auto mode on my LDG tuners because of unexpected tuning.? My understanding is the settings are saved; however you need initiate a tune cycle to make the match.? A tune cycle where a match has been memorized should only take a second or two with no major “chattering” of relays.? Perhaps you are holding the “tune” button on the tuner for over 2.5 seconds.? According to the manual, holding the “tune” button over 2.5 seconds initiates a full tune cycle, regardless of if the frequency has been memorized or not. ? 73, Ken, KJ9B ? ? I had to take it off full automatic tune mode because?when on SSB it was trying to autotune while transmitting and my audio was interrupted by the relay chattering to tune the radio. I was under the impression that settings were saved and that retuning wasn't necessary. 73, CW Ops #3566 ? Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? ? ? On Sun, Mar 30, 2025 at 10:51?AM Kenneth Bandy via <ken.kj9b=[email protected]> wrote: Is this new behavior?? I mean, your antenna needs to be “re-matched” to your radio when you change bands, or make large frequency changes in the same band.? Is your tuner in full auto mode?? Sounds to me like it’s operating as it should.? Perhaps I’m missing something. ? 73, Ken, KJ9B ? ? [Edited Message Follows] I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna. I use the LDG AT-100ProII autotuner When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button. What I don't understand is why I seem to have to do this with every band switch (or move up/down the band). Is there a solution to this?
|
Good thought, Mike!
73, Ken KN2D CW Ops #3566
Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? Let's chat!
With regards to the RF in the shack post, see if it happens with a lower power level. If not, it may be time for some ferrites.
Mike N3PM
|
Thanks!
73, Ken KN2D CW Ops #3566
Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? Let's chat!
On Mon, Mar 31, 2025 at 10:15?AM Bob Smallwood via <datamedic= [email protected]> wrote: Ken, If your antenna includes a balun or unun, it may be getting warm after a while.?
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Question is what radio and LDG tuner? ? Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.) W4JDY / EM79xr / ITU 8 / CQ 5 United States of America W4JDY1953@... ?
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From: [email protected] <[email protected]> On Behalf Of Ken KN2D via groups.io
Sent: Sunday, 30 March, 2025 09:07
To: [email protected]
Subject: [ldgelectronics] Why do I have to continually retune my radio?? I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna. When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button. What I don't understand is why I seem to have to do this with every band switch (or move up/down the band). Is there a solution to this?
|
No tuner is going to instantly tune to your new frequency, and why would you immediately start talking until your radio and tuner were not done configuring for the new band? ? ? ? Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.) W4JDY / EM79xr / ITU 8 / CQ 5 United States of America W4JDY1953@... ?
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From: [email protected] <[email protected]> On Behalf Of Ken KN2D via groups.io
Sent: Sunday, 30 March, 2025 13:18
To: [email protected]
Subject: Re: [ldgelectronics] Why do I have to continually retune my radio?? I had to take it off full automatic tune mode because?when on SSB it was trying to autotune while transmitting and my audio was interrupted by the relay chattering to tune the radio. I was under the impression that settings were saved and that retuning wasn't necessary. 73, CW Ops #3566 ? Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? ? ? On Sun, Mar 30, 2025 at 10:51?AM Kenneth Bandy via <ken.kj9b=[email protected]> wrote: Is this new behavior?? I mean, your antenna needs to be “re-matched” to your radio when you change bands, or make large frequency changes in the same band.? Is your tuner in full auto mode?? Sounds to me like it’s operating as it should.? Perhaps I’m missing something. ? 73, Ken, KJ9B ? ? [Edited Message Follows] I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna. I use the LDG AT-100ProII autotuner When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button. What I don't understand is why I seem to have to do this with every band switch (or move up/down the band). Is there a solution to this?
|
The auto tuner is going back to its last remembered band settings. ? Normal function as if one had to manually tune to a band using a legacy tuner., ? Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.) W4JDY / EM79xr / ITU 8 / CQ 5 United States of America W4JDY1953@... ?
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From: [email protected] <[email protected]> On Behalf Of Kenneth Bandy via groups.io
Sent: Sunday, 30 March, 2025 14:25
To: [email protected]
Subject: Re: [ldgelectronics] Why do I have to continually retune my radio?? Hi Ken (nice name).? I too have disabled full auto mode on my LDG tuners because of unexpected tuning.? My understanding is the settings are saved; however you need initiate a tune cycle to make the match.? A tune cycle where a match has been memorized should only take a second or two with no major “chattering” of relays.? Perhaps you are holding the “tune” button on the tuner for over 2.5 seconds.? According to the manual, holding the “tune” button over 2.5 seconds initiates a full tune cycle, regardless of if the frequency has been memorized or not. ? 73, Ken, KJ9B ? ? I had to take it off full automatic tune mode because?when on SSB it was trying to autotune while transmitting and my audio was interrupted by the relay chattering to tune the radio. I was under the impression that settings were saved and that retuning wasn't necessary. 73, CW Ops #3566 ? Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? ? ? On Sun, Mar 30, 2025 at 10:51?AM Kenneth Bandy via <ken.kj9b=[email protected]> wrote: Is this new behavior?? I mean, your antenna needs to be “re-matched” to your radio when you change bands, or make large frequency changes in the same band.? Is your tuner in full auto mode?? Sounds to me like it’s operating as it should.? Perhaps I’m missing something. ? 73, Ken, KJ9B ? ? [Edited Message Follows] I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna. I use the LDG AT-100ProII autotuner When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button. What I don't understand is why I seem to have to do this with every band switch (or move up/down the band). Is there a solution to this?
|
I have a sniffer in my shack, a FET field meter, but more often than not a wireless speaker can one hear RFI. ? Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.) W4JDY / EM79xr / ITU 8 / CQ 5 United States of America W4JDY1953@... ?
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From: [email protected] <[email protected]> On Behalf Of mike z via groups.io
Sent: Monday, 31 March, 2025 09:13
To: [email protected]
Subject: Re: [ldgelectronics] Why do I have to continually retune my radio?? With regards to the RF in the shack post, see if it happens with a lower power level. If not, it may be time for some ferrites.
|
I have a 324’ endfed longwire (earlier 567’) and baluns have nothing to do with this incident.? My 9;11 balun even at 900W-1kw never get warm, and if so, one has another problem. ? The SWR of that long wire changes with frequency changes regardless of the balun. ? Point to be made is that autotuners will re-tune whenever one changes bands, but the LDG types should briefly do so if the plumbing in the shack is properly connected meaning not the same as the computer ground for starters.
When I go from the E-F LW to a vertical or HF beam, yes the tuner will adjust itself regardless if it memorized all of these same antennas.
? Probably nothing is wrong but if one tunes at the new band a reduced power as I do at 25W, then sets to high power, no problem as this is standard operating procedure. ? W4JDY / EM79xr / ITU 8 / CQ 5 ?
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From: [email protected] <[email protected]> On Behalf Of J.D. Barron via groups.io
Sent: Monday, 31 March, 2025 09:25
To: [email protected]
Subject: Re: [ldgelectronics] Why do I have to continually retune my radio?? What kind of antenna? If the antenna and tuner worked previously and is acting up now I would look at the antenna instead of the tuner. I have seen a lot of problems with end fed antennas with matching baluns at the feed end that have the ferrite cores bad from overheating. This usually happens after operating for a while, and usually on a data mode and not as often on voice SSB. As a result I don't use the multiband End Fed Half Wave antennas, but rather a long wire with the tuner located remotely at the antenna feed point in a protective box. This way the coax feed has a low SWR and low loss and the match to the long wire is made without additional matching networks. All of that said some people have had good results with the EFHW antennas (and some don't). Most of those that have had problems have radios that will aggressively reduce power if the SWR goes too high, many of the IC-7100 radios. The love their antennas, however and some have sold their IC-7100s thinking that the radio was bad, no matter the diagnosis.? Anyway check the SWR of the antenna before the tuner if possible as there may be something changing the tuning parameters that the tuner may be chasing.
|
Hi Joseph,
It's a Yaesu FT-710 and AT100ProII.
73, Ken KN2D CW Ops #3566
Constant Contact's Top Trainer/Partner Try Constant Contact free for 30 days by going to Need help with email marketing? Let's chat!
Question is what radio and LDG tuner? ? Joseph D. Yuna
Joseph D. Yuna (LCDR USN/ret.) W4JDY / EM79xr / ITU 8 / CQ 5 United States of America W4JDY1953@... ? ? I noticed this weekend when I was changing bands or frequencies on a band that my SWR would go up, even though the day before (or earlier on the same day), I had tuned my rig/antenna. When using SSB,?I wind up setting fldigi to AM to get a carrier and hit the tune button. What I don't understand is why I seem to have to do this with every band switch (or move up/down the band). Is there a solution to this?
|
Both the G5RV and the monoband dipole should be resonant at some frequency within the band(s).
The FT-710 has an internal tuner and how does it act if you take the LDG AT-100 PRO II?
Often the problem is with poorly made coax connectors (even "factory" made. Very common are poor connections for the shield. I have often suggested that someone with a problem installation install a dummy load at the antenna end of the feed line and see what happens. If there is a problem move it to the nest place where there is a connector until you either find where the problem is eliminated or you are screwed into the radio directly.
Is the SWR so high on the antenna(s) that the internal tuner will not handle it. Also do you have both tuners activated. If so this could be your problem as they will interact and act crazy sometimes.
If possible I would check into tuning the antennas for the frequencies you normally operate.?
Good luck.
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Ken KN2D
W4JDY1953_G