External auto tuners (LDG AT-600)

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  • Updated 4 months ago
  • (Edited)
I am trying to run my 6400M remote and would like to use an LDG AT-600II.  When I used this with an Icom radio I was able force the tuner into tune mode remotely by using the Icom interface cable.  I know this tuner has a full auto mode but does not work as good as forcing it to tune.  Can the Flex interface with LDG?  I fear that tuning at power levels high enough to sometimes trigger the LDG could be harmful to the finals in the flex. Sometimes I need to use 50W before the mismatch is higher than 1.7. Not sure that I really want to be tuning with anymore that 10 watts.  Thoughts ?  
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Dave

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Posted 9 months ago

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Mark WS7M

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Dave, I don't have that tuner but I am suprised you need so much power.

I have an HF auto which is used in Auto mode.  It tunes on 3-5 watts.  So I leave my tune slider at 5 w and hit the tune button.

You would have to check the tuner manual to see if there is a version of a USB cable that might trigger it to do what you want.
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David-N5PSM

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I have an at-600R up on the mast,   Never use it anymore and will take it down and sell it.......My HF-Auto does it all!
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Dave

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The difference is the Hf auto reacts based on frequency change. I have one too. The ldg waits for a swr threshold before it attempts to tune
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Mark - WS7M

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Hi Dave, ya sorry... I don't have the tuner so I can't help you.
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David-N5PSM

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i have the ldg 600 remote tuner,   I do NOT like the way it plays with my flex.
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Dave

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I feel that if I could force it to tune it would be great.
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Arvind Mallya

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I have used the LDG AT200 Pro II Auto tuner with my Flex 5000A which did not have a built in tuner.  It works fine.  I hit the tune button on the radio and  it puts out 10 watts, which the tuner displays the tuning power and then starts the tuning steps and displays with the red LEDS the value.  The radio also displays the SWR after it is done.

(Edited)
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Dave - W6OVP

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My LDG Z-11 Pro works flawlessly with the FLEX 6300. At ~10 watts it triggers from the FLEX every time. I run it remote and never give it a thought. It's very important to 'train' the tuner ahead of time.
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Bob Gerzoff, WK2Y

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I have the AT-200Pro II autotuner with a 6500.  No problems.  When I do need it, I just need to make sure the ATU in the Flex is on bypass, I hit tune at about 5-10 watts and it does it's thing.
73,
Bob, WK2Y



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Bernie E Barber

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could sent me a copy of your set up on 6500 with the at-200proii!
thanks Bernie, 
berniebarber1@yahoo.com
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KI4P

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i have the the LDG AT-1000PROII, have it set on auto tune, have no problems with it auto tuning, use 10 watts tune power on all bands, it does occasionally tune ok on 10 and then when on full power it will auto tune if its above the threshold. but after the first time its only a quick click and its there, i also only use ant port 2, which is the feedthru, on my beam it doesnt need tuning, so i have flex set up to turn tuner off when on 10,15,20 meters and back on when on 40 and 80, i also use the flex to auto switch antennas using a usb relay board with my ameritron RCS 8VL, works like a dream! Good luck
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John KB4DU

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Dave;

Are you saying the tuner stops tuning when the SWR is at 1.7, and you want it to tune to a lower SWR?

I coulldn't find a spec for acceptable VSWR, but the Flex should be happy at the 1.7 level, to tuning for a lower SWR doesn't accomplish much.

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KI4P

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No! if it starts the tune process it will tune to a 1.1 to 1. but if the SWR is 1.7  or lower it wont auto tune, providing you have the threshold set to 1.7