Thank you all for the suggestions. I added all the toroids I could find and a common-mode filter on the antenna. I also removed any equipment that was not essential. I freezed after 4-5 CQs. Good suggestions w/r to a dummy load however now I get "error starting HPSDR hardware, ...". From w...

I received a new radio a couple of weeks ago. It seems to work well in receiver mode however it freezes after a few minutes to a few seconds in transmission. I'm transmitting CW into a dipole which is well matched (SWR< 1.5) on 7m. An Elecraft K3 seems to be very happy in the same environment and th...