Hello LF'ers, I have a QRP Labs U3S that is the exciter for a 1kW LF amp. I want the common antenna to switch to feeding my Kenwood TS-590 for RX. The U3S has a pin with selectable delay that goes to
Hi Chris, Use an optocoupler such as CNY 17-4 or 4N28 with 470R in series to the input. The output can be used to switch a IRF540 for example. 73, Stefan Am 24.07.2017 15:33, schrieb Chris Wilson: He