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Hi Tim,

Yes, I have 20 turnss.
See the diagram in the attachment and I did.
If you have 27 turns (you are using firmware 3.2), what is the value entered in EEprom cell 31 - 99?

Regards ,
Marek SQ7BCN
73

Hi,

The thing has been used on 2 systems, windows 7 64bit and windows 10 64bit.

The other interesting detail is the programmer (pickit2) can handle easily the 1938 pic whether if if powered or not powered. No hassle then to do the job and program the options.

I'm quite satisfied being able to use my "old" stuff, as I wasn't so motivated to buy other hardware just for that job.

Last but not least, the the pickit2 can be used to program as well AVR chips (i.e. arduino boards), so definitely this small "old" programmer is an interesting piece of hardware to have and use.(and quite cheap now to buy now)

KR ,
Gio'

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Hi,

FYI a pickit2 works fine with the? 1938...

The device just need to be updated once with the latest available firmware, and the pic is recognized w/o probs...

Software to use is "Pickit 2 V 2.61", and the device update is made trough this sw. Is then possible to read and program the ATU with a new HEX or change the available options.

KR

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I'm not aware of any kits.???

For assembly of smd parts, some places like JLCPCB for example will only load components on one side. The ATU-10 has quite a few parts on the bottom.

glenn

vk3pe

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Hi Marek,

Have you actually counted the turns on your coupler ?

Mine has 27, so that's what I had to input to mine and its working just fine.

cheers

Tim

Hello Guys,
I have a tnner ATU1000 Firmware ver 2.7
atu_100_fw_EXT_27_1500W.hex
Power torque and SWR approx.
I changed the firmware to v3.2 and I can't get the correct power measurements and the swr my measurement (Coupler is 20 turns).
I do not know what value should be entered in memory location 31 (the ratio of the number of turns of the coupler)
If I type 99, I can't get the correct SWR ???

-- 
VK2XAX : QF56if : ITU59 : CQ30 : BMARC : WIA

Hi,can the ATU-10 be bought as a full kit yet with all the SMD componets yet?

Hello Guys,
I have a tnner ATU1000 Firmware ver 2.7
atu_100_fw_EXT_27_1500W.hex
Power torque and SWR approx.
I changed the firmware to v3.2 and I can't get the correct power measurements and the swr my measurement (Coupler is 20 turns).
I do not know what value should be entered in memory location 31 (the ratio of the number of turns of the coupler)
If I type 99, I can't get the correct SWR ???

Marek SQ7BCN

Hi all, Here's one of my "0805" boards, all assembled.??? (I have now built 4 x ATU-10s !!) I don't have the correct BN43-1502 balun core so used a BN43-302 which is a bit longer.

I used David's original test program to check operation of all relays is correct. Unfortunately at present, my QRP rig is not available right now, so I can't test full functionality but have no reason to believe it won't work just fine..

This one will be fitted into a 82mm wide case that I have already.

Glenn
vk3pe

Hi All
Manual mode firmware for test here.
Connect two additional buttons to Ext connector, temporary just for play with this FW. Those are "+" and "-" buttons.

Thank you David and Onno

I have decoupled both Bypass and Tune buttons with 22nf (the only SMD caps I have) caps as close to the processor pins as possible and the tuner copes very well at 100w now.

Tuner faults were:
3 faulty caps (47, 470 and 1000pf)
2 faulty relay driver fets (affecting selection of the 1000pf cap and 0.05uH inductor)
1 faulty plated through hole
Open circuit on one of the bridge sense windings
Faulty or inadequate caps decoupling the bridge sense winding outputs (replaced with 22nf)

For a brand new ready constructed unit....pretty poor!


73 Steve G4EDG

Thanks for the reply. Yes I checked those items and I even changed a relay to be sure. AFter the first comment and more thinking and research, I now think it is the last two toroids or at least one of them that begins to look capacitive at some point. This might be due to poor core material and it does not work as the original spec says. This was a clone and I do not know anything about the toroids and since most manufacturers have their own recipe it could be that this one is not good. I suspect a step might be to get the amidon cores and remake the toroids and see it their is a difference in their performance. This time around I will measure them before I install them and see what I can learn.

john

I have updated the github repo to add the missing files (and updated some of the files).

For the compiler, you will need to download the XC8 compiler, which I think also comes from MPLAB? (if you google how to use MPLAB, they will include a link to their compilers)

Thank you, that worked.?

Karl Heinz - K5KHK

Hi, Steve

Hi

After successfully repairing an ATU-100 I find that although the tuner works well, it tends to switch from auto mode to bypass mode when more than about 75-80watts is used. Has anyone else noticed this or found a reason....or am I just expecting too much from this device!

73 Steve G4EDG

?

I just installed MPLab and MCC, but it’s complaining that I don’t have any compilers installed. When I look for compiler packages, I see large dollar amounts… Where would I find a free PIC compiler that works with MOLabs on a Mac?

de Karl Heinz - K5KHK?