syrupcore wrote:I wish I understood half of this thread. Any one feeling kind enough to explain to me (or point me to good info about) springs and blocks?
One can put up to 5 springs "on" a fender (Vintage) vibrato. With the "Claw" set to put maximum tension on the springs, the plate of the vib will settle on the surface of the guitar body, and thereby transmit string vibration into the body over it's whole surface area. When the arm is not depressed, the bridge will act and sound more like a fixed bridge. As the string tension required to bring the guitar into tune is not enough to pull the bridge off the body, a string break (lessening tension further) will not send the whole thing out-of-tune.
With fewer springs and less spring tension, the back of the vibrato top-plate will tend to float off the body and only the front lip of the plate (under the 6 anchor screws in front of the saddles) will contact the body:
This will give a less full tone. String bending will easier as the plate will pull forward "slackening " the non-bent strings. If a string is broken the guitar will go out of tune as the plate will snap back onto the body.
It's known as a "floating" bridge - when the guitar is tuned, the tension of the strings is compensated for by the tension of the bridge - it sits at an "equilibrium" point. It's also the way the modern "2-Stud" vibratos including floyds, wilki's etc operate.
The block has raised some debate. The vintage Fenders used mild steel, and the 70's fenders (and cheaper copies) used Mazak, a marketting-name for zinc based pot-metal. Recently some people have been fitting cold-pressed steel blocks claiming a better tone and sustain.
As usual, this is subjective, and Mazak does have it's fans. One man's increased attack and treble is another man's icepick-in-the-ear... And, those old greats didn't seem to mind the early materials.
I put a callaham on one strat, replacing Mazak and the differences were very subtle, though some of this could have been the guitar itself - which sounded good to start with. (I know, if it ain't broke...).