DR-250 Build(Maybe)

[ontime1269]

I probably have no business trying to build a DR250. I attempted to start on a pair Tuesday. I went out and bought some 1/8" and 1/4" plywood. I built the necessary guideboards. So I get started on the first piece(throat horn side)and get stumped.

What I have now is a throat horn side with the 12 degree cuts made at the proper height and 21 1/2" long but can't figure out how to safely make the 10 degree cuts. How should I have went about cutting this piece? What saws should I use? I know, dumb questions.....LOL. Thanks.

[el_ingeniero]

You said that you got 1/8" and 1/4" ply. The cab is mostly made from 1/2" ply.

[ontime1269]

I didn't mention that I already had 4 sheets of Arauco. The 1/4" & 1/8" ply I was referring to is for the Horn Sheaths and the curved back.

[Dantreige]

What are you using to make the cuts? Tablesaw or circular saw?

The safest way to make angle cuts is on a tablesaw with a sled. I made several sleds for the different angles I needed when I started my DR's. I'll post some pics if you need them.

[ontime1269]

What are you using to make the cuts? Tablesaw or circular saw?

The safest way to make angle cuts is on a tablesaw with a sled. I made several sleds for the different angles I needed when I started my DR's. I'll post some pics if you need them.

I used my table saw to make the initial cuts. I just can't figure out how to safely make that diagonal cut plus add in the 10 degree angle of the throat horn side. When I first read the plans, I was thinking I could make that cut with my sliding miter saw. Now that you mention a sled, that makes sense but I don't know how to make one to make that cut. Maybe a picture would help. Thanks.

[Bruce Weldy]

Here's the thread I started on how to do this. The Wedgehorns have the same kind of compound cuts. It's pretty easy once you get the concept.

http://billfitzmaurice.info/forum/viewt ... =8&t=14879

[Mikey]

http://billfitzmaurice.net/PanelJig.html

[ontime1269]

@Bruce, that looks like something I might be able to handle.....

I wanted to build a panel jig for my table saw but I'm not sure if it will work properly. I bought a used Ryobi BT3100. Those saws don't have the slots on the table for the runners. The solution is a part that is available for the table which adds 2 miter slots to the table saw. The previous owner did install one. The piece sits to the left of the blade though. Here is a picture of the the saw table with the piece added:

http://cgi.ebay.com/DUAL-SLOT-MITER-TAB ... 4cf64f90bd

Do you guys think a panel jig would work on this table?

[Dantreige]

Do you guys think a panel jig would work on this table?

Yes.

[Bruce Weldy]

@Bruce, that looks like something I might be able to handle.....

I wanted to build a panel jig for my table saw but I'm not sure if it will work properly. I bought a used Ryobi BT3100. Those saws don't have the slots on the table for the runners. The solution is a part that is available for the table which adds 2 miter slots to the table saw. The previous owner did install one. The piece sits to the left of the blade though. Here is a picture of the the saw table with the piece added:

http://cgi.ebay.com/DUAL-SLOT-MITER-TAB ... 4cf64f90bd

Do you guys think a panel jig would work on this table?

My sled doesn't require a slot. It rides up against the fence. It's not really sophisticated enough to even call a sled - it's just a piece of scrap ply (yeah, I know it's a sled, but it was so easy, it just doesn't seem right).

[erriod]

I just completed the build of one of my DR250's the second one I did not pick up enough material to complete it (1/8" plywood).

Make very sure you are getting the correct angles for the horn. If you are having trouble now being frustrated with the angles on the horn throat will really do you a number. Pull up the model given with the plans and make very sure you are getting the correct angels on the 2 sides of the plans. One set of angles are the same direction, the other 2 are opposite. (I think it was one of the 12deg cuts).

Don't give up the build though there is something satisfying about ending a night with PL glue on your hands and your speakers taking shape.

[Gauss]

I built DR200s and I was new to woodworking. It took a really long time, and I had to get help and borrow tools many times, but step-by-step I got through it. For angles, I borrowed a magnetic angle measuring device, that let me stick it to the saw blade to find the absolute angle and not rely on the cheap tablesaw knob.