JUMA Amateur Radio Forum

Hi Juha. Thanks for the info. I checked the REW-PWR line as you said, and indeed there is a problem there. However, the problem is not a short circuit to VDD. I measured about 1.5V on the REW-PWR line, and also on the FWD-PWR line beside it . If I disconnect pins 1 and 2 of J3, it rises to 2.5 V. I ...

Hi folks. I've just completed my first serious SMD construction project. My TX-500 powers up OK, and shows the correct S/W version etc (V1.04), but when I press "Oper", the alarms sounds , and it flashes "SWR". Any suggestions? Many thanks, es vy 73 John EI7BA