¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. ATU100
  2. Topics

ATU Ticking Noise on receive.

 

HI all,

I'm in need of some advice please, I purchased an ATU 100 from Ali Express, I have had it for about 5 months, on the front, it has 1 green tune/reset button, a red on/off rocker switch and a USB C charger socket, it has an internal battery.?

From the first day of use, it has a ticking sound that can be heard through the receiver only, it is present throughout most of the HF range, it is regular and does not change in frequency, the ATU100 unit itself, makes no audible clicking noise (except when tuning and you get the relays clicking), so the noise can only be heard through the receiver, apart from this, the ATU100 works very well.

For months, I have thought it was local interference and didn't suspect the ATU100 whatsoever, the only thing I have had to do so far was replace the OLED display which went wrong, I do not use the ATU100 whilst it's charging as this also creates noise, since becoming more active on HF,? the clicking is becoming more of an issue when listening to weak signals, I have used a manual ATU to confirm that the clicking dissapears when not using the ATU100.

Has anyone else experienced this problem and if so, how did you cure the problem?.

Thank you for taking the time to read my post.

73
Pete
 

Hi.
The same problem. In my case, solved re-solder all the relay's and coils.
JM


El s¨¢b, 2 mar 2024, 19:29, Peter - M7HRL <petersheldon49@...> escribi¨®:
HI all,

I'm in need of some advice please, I purchased an ATU 100 from Ali Express, I have had it for about 5 months, on the front, it has 1 green tune/reset button, a red on/off rocker switch and a USB C charger socket, it has an internal battery.?

From the first day of use, it has a ticking sound that can be heard through the receiver only, it is present throughout most of the HF range, it is regular and does not change in frequency, the ATU100 unit itself, makes no audible clicking noise (except when tuning and you get the relays clicking), so the noise can only be heard through the receiver, apart from this, the ATU100 works very well.

For months, I have thought it was local interference and didn't suspect the ATU100 whatsoever, the only thing I have had to do so far was replace the OLED display which went wrong, I do not use the ATU100 whilst it's charging as this also creates noise, since becoming more active on HF,? the clicking is becoming more of an issue when listening to weak signals, I have used a manual ATU to confirm that the clicking dissapears when not using the ATU100.

Has anyone else experienced this problem and if so, how did you cure the problem?.

Thank you for taking the time to read my post.

73
Pete

 

Thank you JM, I will give that a go.

73
Pete.
 

Hi Pete,
?Did you find the problem - I now have the same here on my ATU-100 (bought built out of China) - it seems to be something that has happened recently as I'm fairly sure the last time I used it (about 1 year ago), it was fine.
?
73 Ed DD5LP.

1 - 4 of 4