WOW, thanks for the response.
?
73,John N6TRC
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Re: ATU-1000 SWR reading is wrong in 20m band
Hello there,
It is a quite good number for me.? The return is loss above 14 dB ( 14 and 20 dB; 1.45 x 1.2? SWRs) . The nanoVNA bridge is much more accurate. In my opinion your ATU1000 bridge is quite accurate.?
73
Paulo
Hello team,
?
While comparing the 20m band SWR with nanoVNA, I find some discrepancies:
?
ATU-1000 1.45:1
NanoVNA: 1.2:1
?
Other bands ATU-1000 SWR are lower than 1.3:1.
?
What would be the first troubleshooting step?
?
Cheers!
|
|
|
Does anyone experience or know the maximum the VSWR mismatch the ATU-10 can tune to? Would it be like 3:1?
?
Thanks,
?
John
N6TRC
|
Always tune till find certain threshold?
Hello,
?
Is there a way to force the tuning cycle to tune untill a certain threshold??
?
04 cell - I have read that its incremental to current SWR status, is this correct?
?
Cheers and thanks in advance.
|
ATU-1000 SWR reading is wrong in 20m band
Hello team,
?
While comparing the 20m band SWR with nanoVNA, I find some discrepancies:
?
ATU-1000 1.45:1
NanoVNA: 1.2:1
?
Other bands ATU-1000 SWR are lower than 1.3:1.
?
What would be the first troubleshooting step?
?
Cheers!
|
Re: ATU-1000 SWR Bridge adjustment question
Hello everyone,
?
Just so you know...
?
I have used a manual antenna tuner with a 50 ohms load connected at the antenna port.
?
With a VNA, using both inductance and capacitance from the manual ATU, I configured it to get SWR 2.7:1 .
?
Then, by means of TX, I was able to adjust the SWR accordingly using the potentiometre in the ATU-1000.
?
Profit :)
?
?
?
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Re: Cell 04 (EEPRON) value to set the threshold settings in automatic mode
Hi, David,
I knew that.? But? I was also wondering: why on other bands where the lowest found vswr is around 1.5 I've never experienced the same behavior?
But, yes I will definitely set it to a much higher number: 20.
One final question:
When cell number 4 is 13 and the lowest SWR is 2:1 for example, what will be the vswr value the will force an automatic tuning???
Thanks a lot for your answer!
Greetings from Rio. 73
Paulo Em qua., 16 de out. de 2024 12:34, David Fainitski via <rolin791= [email protected]> escreveu:
Hi, Paulo?
Yes, you can change the value in the cell 04. This is a SWR needed to be changed to trigger a tuning process.
An example, your current SWR is 1.5. Value 13 is meaning the tune will start with new SWR 1.8.
|
Re: Cell 04 (EEPRON) value to set the threshold settings in automatic mode
Hi, Paulo?
Yes, you can change the value in the cell 04. This is a SWR needed to be changed to trigger a tuning process.
An example, your current SWR is 1.5. Value 13 is meaning the tune will start with new SWR 1.8.
|
Hello Luca,
?
I am using this one:
Best regards,
Paulo Bastos PY1JDX
|
Cell 04 (EEPRON) value to set the threshold settings in automatic mode
Hello everyone,
Hello Dave,
I've been using a ATU1000 Kit, version by EU2AV (), with it has a very good HW solution, using on board for the CPU and another for RF parts with robust Inductors, capacitors, relays and relay drivers transistors.
The unit is on the top of my building on a IP66 container and on automatic mode.
It works very well for 95 % of the time on my multiband non-resonant G5RV antenna version.
On the most of the bands it achieves an SWR around 1.5:1, and it is quite stable.
But, on 40 m though it always reaches a 1:1 SWR ratio., and only on that band it suddenly starts an automatic tuning with no apparent reason.
.
I suppose that any minor change on antenna geometry triggers the tuning process. That is quite annoying. (BTW: the unit is 10 floors above my apartment shack without any possible remote control).
*The cell 04 (EEPRON) value to set the threshold settings in automatic mode is 13
I visualize two possible solutions:
1. Increase cell 4 value to 25, so the unit will be last sensitive to minor SWR changes
2. Implement a simple tone remote command (contact closure) to set auto to "off" after successful tuning and back to "on" to force the tuning start on a new band or high SWR situation.
?
I need help to decide the best solution and (or) the recommended cell 4 value to avoid the above-mentioned behavior.
Best Regards,
Paulo Bastos - PY1JDX
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Re: Bypass for ATU-100 with only one button?
The BYPASS and AUTO modes are shown with an underscore and a dot on the top right hand side of the display, it may be difficult to notice.
?
See some detailed pictures on my blog, it's about the ATU-100 kit
?
?
73
Luc ON7DQ
|
Re: Bypass for ATU-100 with only one button?
Hi,
Check that you are connecting to the correct points on the PCB (see below).
Are you continuously shorting B2 to GND or for a short time? A short press should toggle the bypass state.
There is a 50ms de-bounce on the button press.
When bypass is active, there should be an underscore ¡°_¡± on the top right-hand side of the display.
73, Dave
?
|
Re: ATU-1000 SWR Bridge adjustment question
Hi Luis,
Read this thread: /g/ATU100/topic/104260313
also read the manual on github
---
Cu ganduri bune,
Marius ¨C YO6RK
senty.ro
73!
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Show quoted text
-------- Original Message --------
| Subject: |
Re: [ATU100] ATU-1000 SWR Bridge adjustment question |
| Date: |
09.10.2024 12:32 |
| From: |
"CT2FZI" <ct2fzi@...> |
| To: |
[email protected] |
Hello,
?
How are you doing?
?
I was not able to get any reading from your method when swapping the input with output in order to calibrate SWR.
?
What other method can I use to calibrate the ATU-1000 SWR kit??
I have 3.2 firmware already flashed by the manufacturer, also .96 oled display was provided in the kit.
I reckon it works, when I play back and forward with the SWR variable resistor , the tuner starts a tuning cycle untill it thinks its tuned.
?
Cheers and thanks in advance,
?
Luis CT2FZI
|
Re: Bypass for ATU-100 with only one button?
hello,
?
I have atu-100 EXT 1.8-55MHz with a single and green button. I want to connect a button for bypass. When i short circuit ¡®B2¡¯ with gnd via pcb, there is no change in the display, and it does not switch to bypass mode. I am using v3.2. is there a cell setting in the software?
|
Hello everyone,
?
I have successfully (well sort of) completed the ATU-1000 kit.
?
However, while trying to tune the SWR via the potentiometer, when swapping the connectors, I have no power readout.
I have made some troubleshooting, by disconnecting the dummy load and playing with the potentiometer, in auto mode the tuner starts a tunning cycle with high SWR...
But, how to proper adjust??
Cheers and thanks in advance.
?
?
|
Re: ATU-1000 SWR Bridge adjustment question
Hello,
?
How are you doing?
?
I was not able to get any reading from your method when swapping the input with output in order to calibrate SWR.
?
What other method can I use to calibrate the ATU-1000 SWR kit??
I have 3.2 firmware already flashed by the manufacturer, also .96 oled display was provided in the kit.
I reckon it works, when I play back and forward with the SWR variable resistor , the tuner starts a tuning cycle untill it thinks its tuned.
?
Cheers and thanks in advance,
?
Luis CT2FZI
|
After measuring the power in the antenna: swr is the same at 51% and at 78%
The output power identical ,the faulty power measurement part (in ATU) indicates well after I use it as bypass helper
|
Hi,
---
Cu ganduri bune,
Marius ¨C YO6RK
senty.ro
73!
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Show quoted text
-------- Original Message --------
| Subject: |
[ATU100] ATU-1500 Enclosure |
| Date: |
03.10.2024 10:40 |
| From: |
"Luca IK2LRN" <derek.dominos66@...> |
| To: |
[email protected] |
Hi , i am looking an enclosure for ATU-1500
73
Luca
|
Hi , i am looking an enclosure for ATU-1500
73
Luca
|
CT2FZI