Atu-100 Firmware

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Finley Chopin

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Aug 3, 2024, 4:54:05 PM8/3/24

to tingpacollnu

Around October 2023 a new product was launched by BI3QWQ, the ATU100M Pro with increased internal parts and greater tuning range, plus increased quick tuned memory recall of 60 instead of 20 presets and a morse practice facility.

I obtained AT-100M Pro from Aliexpress Protolab Store during their Black Friday promotion week, it was priced less than I paid for the standard AT-100M back in June 2020, costing 63.30 or $80 USD and it took around 8 days to reach me here in the UK.

The pro version has a slightly longer enclosure to accommodate the extra internal parts/pcb but the other dimensions, screen etc remain the same. There is an extra 3.5mm jack at the rear for a morse key.

I was contacted by BI3QWQ who informed me of new firmware also applied for the standard ATU100M so I was sent the file by email and upgrade was very easy using Pickit 3 device and plugging into the header on the PCB which is behind the front panel. There are no pins on the upgrade header, just 5 holes so a double male pin arduino style short cable is required to link the pickit 3 to the ATU100M .

Pros : Both tuners work great, the AT-100m pro gives greater range and tunes 80m with ease, it also tuned 160m during testing and no problems. For the price paid there is nothing out there with anything like the quality. The units are constantly being improved firmware wise and as I write this there is another firmware beta (1.24.1a which is for AT-100M Pro version only) which displays max tx peak power. That I could try out, but for now I am happy with v1.23.8a on both units.

An excellent overview of these tuners. I also have the original version, and am somewhat considering getting the pro as well (as you have). I think it works quite well for things like well-tuned OFCDs or EFRW into 9:1s at an appropriate length.