Plugged sound card mic into speaker #ubitx

Rob French (KC4UPR)

I've been using my ubitx with the speaker output connected directly to my USB sound card input.  The sound card supplies ~2V for an electret mic, but I figured I was fine since the ubitx output has the 47uF capacitor after the LM386... But I just realized, that is the wrong polarity for a DC bias applied from the USB sound card!  I haven't seen a pop, but am I slowly destroying that output capacitor?

Join to automatically receive all group messages.