Wojtek,
?
I'm sorry you went this way, but you can learn from your own mistakes.
I'm just recommending it, because it worked for me (it's true that I'm not using it in remote mode) that the power supply protects against overcurrent intake with current limitation.
Before replacing the FETs, it is advisable to select the new ones with almost the same opening voltage. Bias setting should be done with a maximum 2.00 A power supply.
I have v2, which has an IRFZ24N built in, and these are more sensitive to overvoltage and overcurrent.
I replaced it once because I tested it on a battery (without current limitation) and I'm still using them.
I think this is due to the current limitation. The limitation is 12.5V and 6.50 A.
I currently have over 10k connections in 1.5 years and I use one antenna (without antenna tuner) on 3 bands (7-14-21MHz) with a slanted vertically fed delta loop antenna.
In short, I am satisfied with the v2 hardware, although I have made several small modifications.
Most of them were aimed at reducing the temperature.
--
Gyula HA3HZ
HA3HZ