Ken, a resistance in the range of some kilo-Ohm and some ten's kilo-Ohm in parallel with a capacitance in the range of some 100 pF to some nF. Large variations depending on the brand. 73, Rik ON7YD -
Ken, I have *measured* two soundcards so far. My notebook's (Medion) onboard soundcard has 4kOhm, a friend's delta 44 had 10kOhm. I guess you want to operate your soundcard as vlf receiver? 73 Clemen
Hi Ken stick a steady signal into the card on one channel, (use one of the waterfalls) but put a small, say 20k, pot connected as a variable resistance in series with the source. Wind up the pot' til