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Double Bass Restringing Question

Try changing only one string at a time. While each string is off use a pencil to "color" some graphite into the string slot on the bridge. Bring your new string up to tune (maybe even 1/4 tone past), then move on to the next string. Don't be surprised if the bridge moves a little, it is to be expected. Just be sure to get it back in its proper relationship to the top and all will be well. There are lots of posts in the tb forums about it and some videos on youtube that you may find helpful.

Good luck.
 
Matt R. said:
Thanks Don. Why are you recording the string length? I'm sure it's a dumb question.

I bet so that he knows if/when the bridge angles up slightly, especially if there are adjusters that allow a little play in the angle. Knowing the exact length from nut to bridge-tip when all has just been set up by a pro let's you know about the "tilt" you mentioned.
 
When I restring, I crank the tuning machine with my left hand and hold the top of the bridge in place with my right. Bonus points for sounding the string while tuning to a harmonic on the adjacent string. I find this technique isn't always necessary with steel strings, but with gut or nylon which stretch like crazy, it's mandatory.

Lay the bass down on its ribs and eyeball the bridge, in profile, every so often. It's ok to give it a gentle, sidelong karate chop or gentle tap with the spine of a paperback book if your bridge is tilting toward the neck.
 
If I'm not sure of my original string length, would it be appropriate to set a small square on the bass's top and then check that the tailpiece side of the bridge is parallel to the square while the feet are centered on the ff hole notches?
 
Yes, I use a right triangle against the back side (bottom face) of the bridge to check that the bridge is not begining to pull in either direction.

But there is still good reason to check your string length -If you carefully measure from the lower end of the nut slot to the upper end of the bridge slot on both the E string and the G string you will be able to check that your bridge is straight and that your string length will be correct accross all strings.
 
If I'm not sure of my original string length, would it be appropriate to set a small square on the bass's top and then check that the tailpiece side of the bridge is parallel to the square while the feet are centered on the ff hole notches?

That's ok, assuming your bridge was set up that way. For example, mine was set up with the bisected side of the bridge 90º to the top.