|amerbs38 ||10-08-2013 05:03 PM |
Double Truss Rod Question
I just got a 1975 Pedulla-Orsini 4 string bass and found it has 2 truss rods with what looks like 5/16" nuts on each one (I haven`t gotten a wrench yet). I`ve never dealt with a 2 truss rod neck before and before I mess with it I wanted to see if there`s anything I need to know about adjusting one of these...Thanks!
|Bruce Johnson ||10-09-2013 06:20 AM |
Nothing really special about having two truss rods. Those are two classic Gibson-style single acting rods. Yes, those nuts should be 5/16". Use a long, thin-walled nut driver on them, or you can use a small 1/4" drive ratchet, extension and socket. Gently....
The main thing is that they should both be adjusted to about the same tension. When adjusting them, work back and forth, a little at a time, keeping them about equal. You should only tighten one more than the other if you are deliberately trying to correct a twist problem.
Looking at your picture, what worries me is why one rod is sticking out through the nut and the other isn't. That doesn't look good.
|96tbird ||10-09-2013 08:54 AM |
Looks like all the raw wood has been milled out long after 1975. My thought is that the rod had been broken and they hogged out just enough wood to get a nut on the busted rod and save the bass.
|amerbs38 ||10-09-2013 10:51 AM |
Thanks for the info!
|DiabolusInMusic ||10-09-2013 11:05 AM |
There are two styles of double truss rod, perpendicular and parallel. Jerzy Drozd's setup guide explains both of them, you can find it in one of the setup stickies. I would be my bottom dollar these run parallel, so whatever you do to one, do to the other. When I had a double truss rod bass I always intended to pick up one of those gauges that tells you how much pressure you are using so I could get it a little more accurately than eyeballing it, but I sold the bass and never looked back. I prefer a single truss rod for simplicity.
|All times are GMT -6. The time now is 11:55 AM. || |
Powered by vBulletin® Version 3.6.12
Copyright ©2000 - 2013, Jelsoft Enterprises Ltd.