Wiley,Another thing to try, since we tune to A440 - bring that tone 'up to tone' first, then tune the remaining strings to "A".
In ex;
1st string - at the 5th fret (this is A4)
2nd string - 10th fret (again, A4)
3rd string - 2nd fret (this is A3) or 14th fret (A4)
4th string - 7th fret (A3) or 19th fret (A4)
5th string - open (A2), or 12th fret (A3)
6th string - 5th fret (A2) or 17th fret=A3
It's is supposed to read as such;
A4 = 440hz
A3 = 220hz
A2 = 110hz
I've tried that and it works if you want equal temperament, but that's not what I want. I've read that for a guitar (or piano, and other similar instruments) to be consonant across all the different keys it can play, the major 3rd has to be slightly flat. That's why one can tune their guitar to have a perfect E chord and then play an A chord and it sounds horrible; conflict between G# and C# (the maj 3rds of E and A respectively).
I used to tune my guitar using 5th and 7th fret harmonics and could never understand why it wouldn't work. Now I know, there have to be some beats in the frequencies of each string.
Bill