Hello, i keep blowing sound cards in my computer. I am using a Bearcat 350a scanner with a cable from the external speaker jack to the input on my sound card. I have made sure that my level on the card is low, and also made sure the level on the volume of the scanner is low and it continues to happen. Is there some kind of device that will interface my scanner into my computer without going through the sound card say maybe usb? Or is there a scanner that is reasonably priced that connects to the computer with usb so that i am not going through my sound card? Thanks for your help, i just can't afford to keep replacing sound cards.