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Maybe I'm missing it but I know you can buy the ATU-100 in kit and fully assembled PCB form, but I'm not finding anything similar for the ATU-10 (just the complete ATU-10 in metal housing with

I assume that you refer to the ATU-100 build. The chip can be purchased from Electronics stores like DigiKey or RadioSpares. search for 16F1938? and ensure you get the correct package style. You will

Apologies. Can not find any of the ic on the WEB. EBay etc. Any help in finding the ICs, programed if possible would be great thanks Vaughn

Paul The markings on the pcb have regard to how the ATU operates - it wants to receive the signal from the transmitter on its IN terminals and feed the "matched" signal to the antenna through the OUT

Paul The markings on the ATU refer to the ATU itself.????? So 'OUT' is _OUT of_ the ATU. ie TO the antenna. With respect, I wonder if you could write your questions a little better formatted

its not clear realy is it as the out from the tunner could be the out from the rig or the in from the rig,depends how you look at it!,the issue is mine is fitted into an old aluminium ebike brushless

Paul Try to think logically. ??? IN is from the Transmitter ??? OUT is TO the antenna vk3pe

I haven't got a board in front of me to check but convention would have the input from the transmitter going to the "IN" connection and the output to the antenna going to the "OUT". Bill VK7MX

good one ! Hows things? glenn

Hi Paul They're SMA Dave

what is the wen?.

i did ask this before but cant remember the answer,i see no way to find my old posts on here to check.

can someone tell me what connects to the antenna,is it the in or out on the pcb,i see nothing in the manual,thanks+73.

David, Thanks for your information. OK. Well, I guess the algorithm could randomly try combinations (both for very high and very low impedances) until it reaches an ADC value below overflow (again,

Stephan, on my opinion, the SWR should be below 10 for normal tuning algorithm operation, because the tuner is not able to measure SWR more than 9.9. On the practice, it should be 5-6 for successful

Hi David, Thanks, that's one possibility, or simply model it. But I have no idea how high the max. impedance is the ATU-10?can still handle. For example, a 4.2m tall vertical would show on 10m an R

Thanks to new algorithm of diodes linearity compensation, now ATU-10 can measure voltages on them below 1V precisely. But I forgot to change some part of code to?realize this feature. I have changed

Stephan, I would use a VNA to make sure no high impedances on needed frequency

Many thanks to David N7DCC for responding so quickly with updated firmware that now handles tuning at power levels of <1W. /g/ATU100/attachment/2279/0/Test_ATU-10.hex I have tested it

Hi David, First, thanks a lot for your great work! I want to use the tuner at the feed point of the antenna. From the transceiver to the antenna, it looks like the following: