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2 ATU-100 Units wont work.

#atu-100

Steve #1752 Hi all. I am new to this group and hope someone here can help me. I am very frustrated as I have received two ATU-100 units from the same source (eBay supplier) and both units refuse to work. When I short press to "reset" both units nothing happens, and when I long press to "Tune" nothing happens there also. I have seen these units used successfully on YouTube. The process seems so simple. I am aware that a power output of 10 or more watts is required to trigger tuning with these tuners and my Icom-7400 can easily supply that with up to 100watts of RF output available. I have tried disabling the built-in ATU in the radio but this makes no difference. Has anyone else in the group had a similar experience with one of these?? Steve.
David Fainitski All Messages By This Member #1754 Hi, Steve. For short or long press the button you can see on the display what is happening. Are those units have displays ? You can open units and check if the button connected properly to the board .?
Steve #1755 Hi David! Thanks so much for your quick reply. I did check the switch connections on the first one. I will check the second. I am starting to think that the seller is paying someone to assemble these and sending them out untested. They were good enough to send out a second one which I was very happy to receive. You can imagine my disappointment when the second one didn't work either. I'm luck as my HF dipole tunes below 1.8 :1 swr on 10 and 20 metres, so I'm still able to use it. Steve M7HME? toggle quoted message Show quoted text On Wed, 26 Oct 2022 at 17:54, David Fainitski <rolin791@...> wrote: Hi, Steve. For short or long press the button you can see on the display what is happening. Are those units have displays ? You can open units and check if the button connected properly to the board .?
Steve #1756 Hi again David. Yes they have the screen, and the battery pack inside.? Steve. M7HME? toggle quoted message Show quoted text On Wed, 26 Oct 2022 at 18:24, Steve via groups.io <castle.hill82@...> wrote: Hi David! Thanks so much for your quick reply. I did check the switch connections on the first one. I will check the second. I am starting to think that the seller is paying someone to assemble these and sending them out untested. They were good enough to send out a second one which I was very happy to receive. You can imagine my disappointment when the second one didn't work either. I'm luck as my HF dipole tunes below 1.8 :1 swr on 10 and 20 metres, so I'm still able to use it. Steve M7HME? On Wed, 26 Oct 2022 at 17:54, David Fainitski <rolin791@...> wrote: Hi, Steve. For short or long press the button you can see on the display what is happening. Are those units have displays ? You can open units and check if the button connected properly to the board .?
Steve M7HME #1781 Hi David. You were absolutely correct. Both units had a dry soldered joint behind the green activating button. I was allowed to keep both units for my trouble, so great result after a bit of a stressful time. Steve M7HME?

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