Have tried all soundcard options, no change on screen, no audio signal at jack, pre-IF unresponsive to antenna yes/no, no change on any display on program or scope, when antenna attached detached.
I'lve just orderes some FETs for the front end, which may be blown, though never connected to an outside antenna or anything that would get a transient past
the input diodes.? I'll try some more troubleshooting, thank you for your help,