Harmonics vs fundamental frequency

[Mike(Mont)]

I have been using fundamental frequencies for a while but I used to use harmonics. Anyway I went back to harmonics of fundamental freq x 100. I have a list of frequencies that supposedly came from Bob Fitzgerald and some of his frequencies were the fundamental frequency set at a mag reading of 50000. So I decided to bump up the fundamentalfreq for gold 39.769 Hz and converted it to 3976.9 Hz -- this is how Fitzgerald has it on his frequency chart. I've heard different things about higher frequencies like they don't penetrate as deeplp, and they hit small targets better, and pinpointing is easier at least on my receiver. I know Dell Winders and some others use the lower frequencies said it locks-on faster. Oh yeah, I also heard the higher frequencies are more temperature sensitive. Feel free to add any comments.