So, with a normal log pot, if you wired it normal and started with it fully CW then turned it CCW 10% from the top you would be 10DBV down (divided by 10)and CCW 20% from the top would be 20DBV down (divided by 100), etc.
But if the control was a reverse log and wired normal then turning it CCW 10% would only yield a 1 DBV drop and 20% down from the top would yield a 2 DBV drop, etc. To get 1/2 voltage or 3.1DBV you would need to turn it down 30%. And at the other end to get a 10DBv change you only need to turn the pot 1% from where it was (assuming it was not all the way at the CCW position). I hope I said all that right for it can be very confusing! Perhaps if wired as an inverse feed back control it might seem mere useful? Reverse log pots don't seem very useful to me but then I don't have a lot of experience with store bought stuff. In the case of HAM radio speech equipment, I prefer linear pots so if I need to change the audio voltage by 10% then I turn the pot 10% regardless of its current position. Of course in stereo HIFI equipment, where there is an acoustic listener, I use log pots. John, WA5BXO ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
