Request File for I/O and ATU AH-4

552 views
Skip to first unread message

Antonio Reina

unread,
Sep 5, 2024, 11:55:23 PMSep 5
to Hermes-Lite
Hello.
Newbie question with HL2
I would like to know if anyone has a programming file for the I/O board, which controls an Icom AH-4 ATU. I have tried to find it in the repositories, but I have not been able to get it to work correctly.

Regards and thanks.

Antonio D.

Steve Haynal

unread,
Sep 15, 2024, 11:16:33 PMSep 15
to Hermes-Lite
Hi Antonio,

I still use the original method to control a AH-4 and now AH-705:

I have 3 HL2s setup for this. 

If there is a way to control an AH-4 with the new IO board, I would recommend using that instead.

73,

Steve
kf7o

Antonio Reina

unread,
Sep 16, 2024, 5:43:54 AMSep 16
to Hermes-Lite
Hi Steve.

Thanks for your reply. I'm considering this solution as a last resort, as it is incompatible with the I/O board. If I can't control the coupler with the I/O board, I'll have to opt for that, and get rid of the board... unfortunately.

Thanks and good contacts.

Antonio D. (EA7HGL)
Message has been deleted

Antonio Reina

unread,
Oct 6, 2024, 8:26:13 AMOct 6
to Hermes-Lite
Hi Steve.

I've decided to fix it with the method you use.

I've placed the components
Q4B, Q6B, R4, R8, R16
The voltages are correct., as indicated on the page:
https://github.com/softerhardware/Hermes-Lite2/tree/master/hardware/enclosure/endcaps/kf7o/hl2_40b#atu
Also the wiring.
I've tried with a LDG Z-100PLUS, and MAT-705.
When I press the TUNE button on the Thetis ......... but the ATUs don't work.

Is this setup correct? Is there something wrong?

Thanks for your attention.

Antonio D. (EA7HGL)

Steve Haynal

unread,
Oct 6, 2024, 2:33:05 PMOct 6
to Hermes-Lite
Hi Antonio,

I believe only Quisk is setup with the old method to control ATU AH-4. I have only used the AH-4 with Quisk. Did you try Quisk? You have to enable the antenna tuner function (set to tune) in Quisk.

Screenshot from 2024-10-06 11-31-44.png

73,

Steve
kf7o

Antonio Reina

unread,
Oct 8, 2024, 3:05:31 AMOct 8
to Hermes-Lite
Hi Steve.

Thanks for your reply, and sorry for the inconvenience.
I haven't tried QUISK.
I noticed that the photos of the board mounting on the website don't match the text mounting:
It puts the Q6A, not the Q6B.
It puts R9 (100K), not R8 (10 K).
Which one is the real one?

Regards and Thanks.
Antonio D. (EA7HGL).

P.S.: I can't find a photo or mention of the mounting that works.

Steve Haynal

unread,
Oct 10, 2024, 11:59:03 PMOct 10
to Hermes-Lite
Hi Antonio,

I may have been trying something experimental in the picture. Stick with the schematic. Depending on what transistor you use, you install position A or B.

Just to warn you, this may be a bit challenging and require significant debug. It is not meant for production use. Are you interested in that sort of experimentation?

73,

Steve
kf7o

Antonio Reina

unread,
Oct 13, 2024, 6:31:12 AMOct 13
to Hermes-Lite

Hi Steve.

Even at 65 years old, I continue to experiment, design, etc. in this field of radio.
The question was about the discrepancy between the text and the photograph.

As I imagined and according to what I saw in the diagram, the Q6B, R8 did not seem appropriate, but I had to try.

Once changed for the Q6A, R9, and tested with the LDG 100 .......... it works perfectly.

So by placing only Q4B, R4 Q6A, R9 ...... it works for me.

Thanks for your answers and greetings.

P.S.: I hope this clarification helps another person who likes to experiment.

Özgür ALPER

unread,
Oct 13, 2024, 2:03:17 PMOct 13
to Hermes-Lite

Hello Antonio. I also want to do this project. I have an io board. I think we couldn't make a software that will work with ah4 tuner with this board. I want to implement the circuit like you. I would be very happy if you share a photo of the parts you use and the circuit diagram. It would be a very good guide for me. Also, what software do you use for Hermes? and what settings did you make. I also have a yeasu band control project in my mind with Hermes io board. I want to control with amplifier and make automatic band switching.
13 Ekim 2024 Pazar tarihinde saat 13:31:12 UTC+3 itibarıyla Antonio Reina şunları yazdı:

Antonio Reina

unread,
Oct 14, 2024, 7:05:20 AMOct 14
to Hermes-Lite
Hi Alper.

I'd like to tell you that the system I've used to control the ATU is with the Hermes Lite 2 backplane, you just have to install Q4B, R4, Q6A, R9 and the corresponding wiring, as indicated on this page:

I haven't managed to control it with the IO board yet, because the different files I've tried don't work for me (that's why I asked if anyone had a file already tested).
Steve kindly replied that he uses the method I'm using now... for the moment; when I have more time I'll have to start implementing it, when I have something useful I'll let you know.
Remember that the components to place are the ones I indicate, because the text indicates the Q6B and it must be the Q6A.

You know where I can help you as much as possible.

Greetings from Antonio D. (EA7HGL).

Özgür ALPER

unread,
Oct 14, 2024, 8:33:57 AMOct 14
to Hermes-Lite
Thank you very much for your information. Can you share the finished project with photos of the cables and hermes lite connections? Also, could you inform me about the changes you made to the control software for hermes?

14 Ekim 2024 Pazartesi tarihinde saat 14:05:20 UTC+3 itibarıyla Antonio Reina şunları yazdı:

Antonio Reina

unread,
Oct 14, 2024, 11:58:45 AMOct 14
to Hermes-Lite
Hi Alper.

I am attaching different photos of the connections, as well as the Thetis configuration (SETUP > GENERAL > ATU).
If you have any questions, please contact me.
Antonio D. (EA7HGL)

Özgür ALPER

unread,
Oct 14, 2024, 2:14:50 PMOct 14
to Hermes-Lite
Thank you very much for the pictures you sent. Very descriptive and useful. I checked the circuit diagram with your pictures and saw that the diodes and capacitors were connected. Are R4/Q4B, R9/Q6A sufficient? Or do I need to solder other components on the schematic? Thanks

14 Ekim 2024 Pazartesi tarihinde saat 18:58:45 UTC+3 itibarıyla Antonio Reina şunları yazdı:
ah4 to hermes lite 2.jpg

Steve Haynal

unread,
Oct 14, 2024, 11:53:52 PMOct 14
to Hermes-Lite
Hi Antonio,

I am happy to hear you have it working. Feel free to add any additional helpful information to the wiki.

73,

Steve
kf7o

Antonio Reina

unread,
Oct 15, 2024, 2:30:31 AMOct 15
to Hermes-Lite
Hi Alper.

The diodes are not fitted, instead there are capacitors to prevent RF input as much as possible. The rest of the capacitors are fitted for the same reason. Although these are not necessary for operation, their use is advisable.

Regards from Antonio D. (EA7HGL).

P.S. Thanks Steve for all your work.

Antonio Reina

unread,
Oct 15, 2024, 7:58:55 AMOct 15
to Hermes-Lite
WIRING.png

Özgür ALPER

unread,
Oct 16, 2024, 12:59:24 AMOct 16
to Antonio Reina, Hermes-Lite

Hello Antonio. Thank you very much for sharing. It was exactly the scheme I was looking for. I will order the necessary parts and start the project. I will share the finished project with you here. I am grateful to you and Steve. I wish you healthy days. 73..


15 Eki 2024 Sal 14:58 tarihinde Antonio Reina <adrg...@gmail.com> şunu yazdı:
--
You received this message because you are subscribed to the Google Groups "Hermes-Lite" group.
To unsubscribe from this group and stop receiving emails from it, send an email to hermes-lite...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/hermes-lite/1e92e69d-113b-4cb1-84f9-6e35d0e06810n%40googlegroups.com.
Reply all
Reply to author
Forward
0 new messages