Ok, new bridge in hand. Ready to glue it onto guitar.
I made a goof the first time I put the bridge on. I had carefully set the bridge up, heated the glue, etc. But when it was clamped down, it shifted a small amount forward. Enough to affect the intonation for sure.
Since I had used hide glue, it was easy enough to take it off and start again.
So now I'll go back to the beginning and show the process and the second gluing.
|Guitarhenge. Left on old guitars by druid craftsmen.|
I'm not sure what type of wood these dowels are, but they're fairly soft. Which makes them easy to work with, but the ends look sloppy when you cut them. Of course they will be trimmed, so it's not a big thing.
During this process, I also found some divots in the top and wound up making spruce patches to fill them. You can see how I cut little rectangles it top and made spruce patches to fit them.
It's important that the surface is reasonably level since the bridge will be under the stress of string tension. The more good gluing surface for the bridge, the better.
Check out my Thermopen. Super accurate digital thermometer. I bought it for cooking, but it also doubles as a water temperature checker for hide glue.
Once you have one of these, you find out how inaccurate those cheap Taylor and even Pyrex thermometers are. Yes, it costs five times as much, but it's ten times more accurate. In cooking, you can get the precise temperature in say, medium-rare versus medium meat. Right on the button.
Here I am heating up the bottom of the bridge and the top of the guitar where the bridge will go. I've already run the two alignment screws up through the top. I like to heat up the mating surfaces to extend the working time of the glue a bit.
It's an oily wood. I scraped it with a small scraper, then wiped it a few times with acetone. The acetone evaporates very quickly. You can see the red oil I got off the bridge bottom. I wiped it a few times until I saw no more oil, then I glued it down.
Tighten the center nuts down, then the outer screws. I have a piece of waxed paper and a short caul between the screws and the surface of the bridge.
Heat it with some hot water and it comes right off.