7MHz WSPR using a dummy load.
I was having problems with transmitting on 7MHz, the Flex1500 would crash and keep transmitting a low power carrier, even after the PC lost contact with the radio. I think it could be RF getting back into it so I'm trying it into a dummy load.
After running into the dummy load for a while I received some more stations but no reports on transmit! A wire between the earth terminal of my tuner and the copper central heating pipe seems to have stopped the RF getting back into the FT1500 on 7MHz. It has stopped the PC mouse from going crazy when transmitting on 3.5MHz.