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What would it take to convert the ATU100 to include memory. That way the TX has a better time each time you change bands. Has any one tried this.

Thanks!? That is exactly what I needed! 73 Mark AJ6CU

Mark; It's documented in the pdf file on the N7DDC github https://github.com/Dfinitski/N7DDC-ATU-100-mini-and-extended-boards/tree/master/ATU_100_EXT_board

Howard, That would be great!? I will do some googling and hopefully find the right combination of presses. 73 Mark AJ6CU

Doesn’t the ATU100 have a test position, that cycles through all the combinations where you can hear the relays operating?

Just finished one of those commercial atu-100 kits (bought this one from Amazon). Have problems, will not tune. Would like to eliminate the relays as a possible issue. But this the vendor has locked

Hi, I've just remeasured with the 10T secondary terminated in 50 ohms (as in-circuit) and the loss becomes negligible, less than 0.06dB! See attached update. No need for alternative core, this is

Hi All, I'm sure some of you may have noticed this before, but when you measure the path through one hole of the BN43-202 the loss appears quite substantial on all but the lowest bands as seen in

Yes, a good idea indeed, thanks. Not sure if the ATU-1000 has some built in modifications, the diagram is quite different, the relays uses high side switching for example

There are lots of pins left on the PIC processor, you could add code to output the needed controls to them. Having RC6 and 7 as a tuning status register would be easy. Set RC6 to high when tuning. Set

Hi all, I would like to embbed an ATU-1000 inside my amplifier. For a smooth operation I would need to switch modes (auto/manual) and read status information (mode/power/swr) programatically. The

Here is how it can be done: https://rde-posten.dk/onewebmedia/OLE-ATU.pdf 73 de niels, Niels

Yannig, What Ellis suggested is what I use with about a 50 ft (15m) run of cat 6 Ethernet cable. Works great! ?In my case I also get the power where I need it with coax bias tees. The guide

I2C is designed for inter-IC communications. You could try something like : https://www.adafruit.com/product/4756 73 de Ellis G7SAI

Hello all, I've ordered an ATU 100 to install on a boat. The ATU will be right at the bottom of the antenna which is about 5m away to the TRX. Can the OLED work at the end of such a long cable run ? I

Marek When you use the relay test program, you need to verify that the relay that is being tested is actually working. You need to use an ohm meter across the contacts to see if the changeover occurs

Yikes, that's the wrong YEAR! mike KO4BCN

No problem. I'm a happy owner of one of the Barb-A-Watts, its the least I could do.

Thanks Don. I ordered the 8 parts from Digi-Key (price is higher than it was before). Mouser said their delivery was scheduled for 2023 (was 2022 earlier). 73 Kees K5BCQ

Looks like digikey has plenty: https://www.digikey.com/en/products/detail/microchip-technology/PIC16F1938-I-SP/2258599