jimistone said:
I set the trem on my strat to float...upward and downward trem arm movement...with 5 springs. It has been my experiance that if you set it up where you only have downward trem arm movement (recommended by Fender), it will always go out of tune when you use the arm. When you have the trem centered (as much upward swing as downward swing), you can keep somewhat in tune when using the trem alot. You have to use the "every action has an equal and oppisite reaction" formula. When you push down to flatten a note, you have to pull a note sharp at approx. the same distance from "center".....its comes alot closer to staying in tune like that...especially if you work on your trem technique.
When you have the trem set up to only acheive downward movement of the trem...forget it...its not going to stay in tune, no matter how many springs you use.
Once again, this usually (in my experience) has nothing to do with the tremelo itself, it's friction in the nut. When you push on the bar, the strings go slack, and some of every string moves through the nut toward the tuners. When you release the bar not all of it comes back, so the tension between the nut and the tuner is lower than it was, therefore that between the nut and the bridge is higher than it was, hence the strings go sharp. The unwound G string is the worst for this, at least it is on my Strat. Yes, a pull on the bar will reverse this somewhat, but you can actually overcompensate and send the strings flat this way. As long as the friction is there, there will be that lag in the equalization of tension in the two parts of the string. This is why steel guitars have rollers between the pedals/bars and the active parts of the strings.
This doesn't happen at the bridge on a Strat, because in the operation of the tremelo on a Strat, the strings do not slide over the saddles.
The solution is to reduce the friction in the nut, and if you have metal string T's replace them with graphite or roller T's; the coefficient of metal on metal sliding friction is extremely high - it's the reason for brake pads and engine oil. As I said, steel guitars have roller nuts for this very reason, and you can get them for regular guitars as well, but I'm not going to chop up my '61 Strat for that. Brass nut? Fuhgeddaboudit!
My remedy (after I got a graphite string T) is to mix a slurry of teflon grease and graphite and to put a tiny glob of it in each slot of my bone nut whenever I change the strings. Occasionally, I need to regrease the G string slot if I don't change strings for a while. It stays in tune, although with a strobe there one might still see a little of this effect left; there is always a little friction, no matter what you do. It's pretty good, though.
The other way would be a locking nut. The strings must be either completely free (within reason) to move or locked down totally to avoid this problem. Even a fixed bridge guitar can have it if you bend strings a lot (bend a string, then it's flat). I use the teflon and graphite on my Les Paul as well. I believe that what a lot of folks blame on tuner slippage is really this effect.
Well, this has been fun. I am off to spend a couple of weeks fishing and SCUBA diving, so I'll be offline for a while.
Cheers,