Hi Ono,

thanks for the quick reply

Is your bypass relay on or off when in bypass mode ?

thanks

Tim


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VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA

Hi all,

I was testing the SWR of my tuner in bypass mode and I found that the SWR is nearly 2:1 on 6m!

Looking at what happens in bypass mode I see that the relays disconnect the L & C but the actual bypass relay stays energised.

The bypass relay only goes off if I remove power. SWR on 6m with no power is a more reasonable 1.3:1

Does anyone else have this issue ?

Is it "normal" behaviour for the bypass relay to stay energised when the power is on regardless of settings ?

Has anyone else tested the SWR of their tuner on 6m ?

thanks

Tim


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VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA

Hi Ono,

Thanks for the info, yours is a bit clearer than the docs on github.

I bought my tuner from Russia so I am sure than they parts a good quality.

I know that it handles at least 500w OK, as it works very well with my station, or did until I updated the s/w without taking a copy off the eeprom data.

I haven't seen the odd behaviour that you are seeing, I seem to have a different problem, I'll start a separate thread for that.

cheers

Tim

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VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA

I just compared the two schematics and as far as I can see the layout is the same. No difference regarding pic control pins to the L & C relays. To me it makes sense that the larger versions are just larger and the control is the same.?

I believe the following values are important to consider;

cell 03 -> timeout cell -> default is 15mS and on my unit the relays are a bit slower. I have changed it to 25mS. Better safe than sorry
cell 05 -> min power to activate, by default this is 5 watt however for the 1KW version you have enabled cell 30. Hence the value you provide here is multiplied by 10. I would set cell 065 to a value of 01. (which means 10W activating)
cell 30 -> value 01 (activate)?
cell 06 -> max power 110 (translates to 1100 Watts)
cell 10 onwards -> the 1KW version uses different L values
cell 20 onwards -> the 1KW version uses different C values
cell 31 -> tandem match turns -> it should be provided by the supplier. I dont remember the number of turns.?

My version has two potentiometers where forward and reflected? can be adjusted as well.?

I have changed the setup from 1KW to 100Watts.? I don't use an amplier and my max output is around 110 watts. So I have changed the bridge to match the ATU-100 turns and change the PIC configuration to match it.

Once I get the C compiler running I will change a couple of things in the program. I would like to use the tuner as a true remote unit and I want to ensure auto tuning (always) as well when I switch off / on the power I want the tuner to come back with initial state. I don't want it to remember the setting. What? I have found so far; when you remove the power the tuner falls back into bypass mode. Which is good.? When you apply the power (assume auto tune is activated) it will recall the last setting and move from there. Which sounds good. However....

I can not explain when tuning a random wire on for example 24Mhz and SWR is about 1:1.6 followed by a bandswitch to for example 18Mhz for whatever weird reason the auto tune does not activate. Even though the swr is worse. When I reset the tuner the tuning sequence starts and the 18Mhz frequency after tuning get to a very low swr of about 1:1.2. I am not sure why this happens but I guess it has to do with complex impedance the the swr bridge not able to recognize the difference.? I did not dive into this topic yet but operational experience shows that there is a very different outcome when the tuner is put into reset after switching bands.?

Best regards,?
Onno pa1ap

Hi all,

I have an ATU1000 and I just updated the s/w to v3.2 but I didn't take a copy of the eeprom data so now my ATU1000 thinks its an ATU100 :(

Does anyone have a copy of the ATU1000 hex file they can share ?

thanks

Tim

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VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA

Hi Rolf,

You are right for the atu-100 however the atu-1kw has also potentiometers to adjust forward and reflected voltages. My bad not sharing this.

Thanks and regards Onno

Hi,

I hope someone can provide some initial bootstrap advice. I am running MLAB X with the C compiler environment. Cloned the github repository and created the project. Imported the header files and the c files and to my understanding it should be possible to compile using those files. However it seems some files are missing or at least some references are not available. I am very rusty on C programming and perhaps it is just me not understanding. However it could also be that the github repository is not complete?

Thanks for advice and regards, Onno

开云体育

My tuner worked immediately there are no alignment procedures. If you use a swr meter on the transceiver side of the atu you will see whether it is working correctly - it should though. You need to check solder joints, whether toroids are wound correctly etc. If it doesn‘t

Hi,

Is there an alignment procedure for an initial tuner? How to adjust forward en reflected voltage? How to test if the tuner really works? How to check the swr value as indicated on the display?? Any guidance how to approach this??

Best regards?
Onno pa1ap

Today I have received the pickit 4 and it really works well on Linux. Just unfortunate it is needed to change a few parameters within the eeprom.?

I'm going to investigate over the next couple of Weeks the following;

1-tuner efficiency

If anyone is undecided about budget 14500 cells, here's a site that may help a little. I was able to find the Soshine 14500 (white-yellow) with solder tabs on Aliexpress...

Hi all
I'm just curious, any place in FW to implement additional functions ? Like showing frequency on the display or memory to store already tuned frequencies?

Hi?
It is meaning the inner diameter, ID?
Use a drill bit 4mm.

Hi, Onno