audioguru Well-Known Member Most Helpful Member Oct 17, 2007 #21 A 1391 doesn't have "voltage gain". You can buy one from a selection of 17 different trip voltages. The trip voltage is not exact, a 4.2V one trips somewhere from 4.2V to 4.5V.
A 1391 doesn't have "voltage gain". You can buy one from a selection of 17 different trip voltages. The trip voltage is not exact, a 4.2V one trips somewhere from 4.2V to 4.5V.
Krumlink New Member Oct 17, 2007 #22 It is a 1381. I meant that it isnt the exact ratings, such as you have already pointed out.