After the tuning operation, to avoid a re-tuning, due to a small swr variation, set the ATU100 to manual tuning: just shortly press the Auto button? and set ATU to manual tuning. A small dot on the display shows the manual or auto status.?
Regarding the transistor operation by looking at LED: it doesn't allow to observe relay proper operation since the operation I
Is around 15 to 20 mS.
Only using an oscilloscope you would know for sure the the relay is properly driven.
Regards from Brazil,
Paulo Bastos? ? PY1JDX?
Em dom., 23 de jun. de 2024 06:47, David Hird via <g4rvh=[email protected]> escreveu:
Regarding the relays I've added diodes as well as a very small led across each relay so at least I now know if each of the transistors are working My next question is? I've used My PicaTune homebrew ATU for years and once it's found a match it remembers for next time so it's not constantly looking for a different match under WINDY conditions or WET conditions. My SG230 I built the AUTO Lock so that once matched in seconds and it's windy or wet outside I just flick the Switch in to LOCK the ATU from retuning. My question is having read people having this same issue with this design would be to have a LOCK switch after the aerial has been matched.? Is this possible in the Firmware and if it is possible would sort the difficult issue of the ATU100 retuning? David? G4RVH
