ATU-1000, 1KW Automatic Antenna tuner
As I have succesfully built the ATU-100 kit, I decided to go for a beafier ATU kit.
Some weeks ago I received a kit from Ali Express.
The ATU-1000 Automatic Antenna tuner kit.
It is based on the same design of N7DCC, but the board is designed by EU2AV.
The same firware is used as the ATU-10/100 firmware. but configured in EEPROM to match the ATU-1000 specifications.
All parts are inside the kit to fully build the tuner.
Nowhere on the internet were some building instructions easy to find. Fortunately, the kit came with a document with some directions on how to wind the coils.
I thought this was useful info, and something to share with you.
I was a bit sceptical about the genuinity of the T200 cores, but I have tested them compared to original Amidon T200 cores I have had lying arround.
And to my surprise there where genuine 🙂
Assembly was easy as all SMD and PIC Microcontroller where already soldered.
The only thing needed to do was soldering in all the relays and inductors.
I had already decided not to use the small OLED display. A large tuner needs a decent larger display 🙂
So I decided to use a 2×16 LCD.
I had a nice case lying around, really perfect for this tuner. so this is done and the tuner is placed in this housing.
I just had to put the controller board somewhere else.I made new board connector cabling so I could place it next to the tuner board.
Not entirely unimportant was the design of the front.
Drawn in Corel Draw, and printed with a laser printer on special aluminum foil. and this foil sticked again on 2 layers of PVC adhesive foil. this is to make the foil as a whole a lot more rigid.
Furthermore, the print is finished with 5 layers of acrylic spray paint.
Things to do:
Improve SWR Bridge, sometimes it doesn’t measure the right SWR, especially with completely non-resonant antenna systems, it can sometimes indicate that the SWR is well matched. But in use, the SWR is still high.
Hi,
That’s very interesting because I am facing some difficulties with this auto tuner…
First of all, the bypass relais is always actuated and the RB1 grouding has only effect on the display (_) but the relay stays in the same position.
Finally, I have remove the 2N7002 which command this line.
Tests are in progress…
Regards
Hi.
I have the same Tuner.
Is there any changes for usind a 2×16 LCD?
My extra LCD shows no numbers or letters. Only light
73 Matze DO4OD
Hi Matze
You will have to edit some adresses in the firmware EEPROM section.
https://github.com/Dfinitski/N7DDC-ATU-100-mini-and-extended-boards/blob/master/ATU_100_EXT_board/ATU-100_Extended_Board_User_Manual_eng.pdf
Check if Addresses:
00 = 7E or 78 or 7A (for a PCF8574AT adapter) or 4E (for a PCF8574T adapter)
01 = 01 (1602 LCD)
I still have to open up my tuner to add a Ground point at the back.. I can make a dump of my hex file and sent it to you if you like.
Hi Bjorn.
That would be fine!!!!
do4od@darc.de
Do you have temperature problems with the SWR Bridge ( the 2 Cores get very very hot with more than 100 Watt´s)
73 Matze
Hello pd5d
whats the version of FW you are using ? I am facing some problems with tunning.
Can you send me also your hex to compare ?
73 de OE9SAU
I finally had some time to retrieve the firmware + eeprom settings from my unit.
You can download it here: https://www.pd5dj.nl/wp-content/uploads/firmwares/ATU-1KW_04-11-2022.hex
Right Click Save as
hello, I downloaded your file but it doesn’t work for me, I have a pic 16F1938 and a 1602 LCD, do you know where the error could be? The older one works thanks Franta 73 OK2W
Hello, I wanted to know if the 6 Toroids are T200 Amidon or T68-2 ? Thank you
Hi Roberto, these are T200-2
Hi !
Do you have a picture of bottom PCB ??
i have buil the same unit, but i think that the capacitor presoldered onboard are not as the schema..
the scheme report 10p,22p,40p,82p,160p,320p,640p
but my measure on soldered capacitors report : 30p,100p,160p,330p,750p,1650,3500p
Can you measure yours capacitor for me ?
Tnx !
Hi pd5dj, can you offer me your Atu 1000W case ? Or were can i buy it ?
Your case looks perfectly and very good!
dk9wf, Fred