BillFitzmaurice.info

One thing I have learnt is that if you "place" 2 pieces of ply together with a bead of PL, it's not as strong as when 2 pieces of ply are pulled tight together with screws. You really do need to get those surfaces pulled together. Sub horn mouth braces are a case in point. On my T39 on my 1st attempt, I just pushed them into place. Not a good stick as it turned out. I cleaned them up and re stuck them with cross driven screws into the horn panel and bottom and all was good the following morning. A lot of what I learned on the T39 has been so useful on the otops.

wounded horse wrote:One thing I have learnt is that if you "place" 2 pieces of ply together with a bead of PL, it's not as strong as when 2 pieces of ply are pulled tight together with screws.

When PL cures it expands into the pores of the wood for a serious grip, but only if the joint is secured with some sort of fastener. Otherwise it will push the pieces apart and it won't work so well. But with the braces they can't be pushed away from the panel on one edge when there's another panel on the other edge. I use a couple of fasteners to hold them just so they can't shift about, unless I'm using dados, then I don't fasten them at all.

I usually just shoot a couple nails on one side of the braces and then clamp the panel slightly. Not too much pressure to warp the panel, but just enough to make sure the brace and the internal panel mate up well.

It wasn't a lack of pressure that was doing me in, but a lack of bracing. I still think I could have done it with clamps, I just would have needed WAY more than what I had laying around. Where I had adequate bracing/ clamping nothing moved. I just didn't have near enough of it to glue as much as I was trying to.

Patience is my master now.

Are you just trying to save time by not having to fill in holes? I'd think setting all the clamps kind of evens that time commitment out...

Clamp only building is OK, but you can't do more than a few panels at a time. If you only want to do a panel a day after work OK, but otherwise fastening is a necessity.

I was trying to save time in the garage by not having to deal with screws. I'm constantly trying to balance time for my own crap with time for my family so I was trying to reduce garage time, not so much overall build time. When doing some practice projects pre-drilling and running screws was taking a huge chunk of tedious time; when I would clamp and leave it wouldn't take nearly as long in the garage.

Of course I was working on a project with only a few glue lines and easy access to clamping positions so it worked out a lot better on those.

@Bill,

Like I said, patience is now my master.

cheapbasslovin wrote:When doing some practice projects pre-drilling and running screws was taking a huge chunk of tedious time; when I would clamp and leave it wouldn't take nearly as long in the garage.

This may have been said already, I didn't read the entire thread, but if you have any idea that you may be building more cabs, buy an air nailer and a small compressor. They aren't THAT expensive. You won't regret it.

jswingchun wrote:

cheapbasslovin wrote:When doing some practice projects pre-drilling and running screws was taking a huge chunk of tedious time; when I would clamp and leave it wouldn't take nearly as long in the garage.

This may have been said already, I didn't read the entire thread, but if you have any idea that you may be building more cabs, buy an air nailer and a small compressor. They aren't THAT expensive. You won't regret it.

Got mine (Husky brand compressor/brad nailer combo) for 80 bucks. I guess Home Depot is good for something.

My oldest is cutting the holes in my horn braces right now. It's times like this that being a dad is super awesome!

This is way better than pinewood derby.

Well, I got my braces mounted, my throat assembly mounted and now my mouth panels mounted. I have to laugh at my general lack of skill. I think it is coming together all right and that I'm not too far off from a pretty good cab, but as I keep adding more pieces, I am having to do a lot of little corrections to keep it tight, squarish and generally not stupid looking. I originally cut the front angle on the throat panels wrong, so I had to adjust the angle on the mouth panel to fix that. I butchered the gluing of the throat assembly so my braces are a little off kilter. Oh, and I made the braces off kilter . Having whined about all of that it is starting to look kind of like a speaker cabinet and that is nice to see.

I think I have a long weekend to get this together, so I may have most of the construction finished by the end of the weekend which will leave finish, crossovers, and a grill. I originally wasn't going to do a grill, but there is so much PL on the horn that a grill suddenly seems like the way to go .

If I find myself waiting on glue and crossover parts I may start the 110's I was talking about in my other thread. I'll include that adventure in here as well.

A few more pics:

http://s342.photobucket.com/albums/o432 ... o%20mouth/

Cheapbasslovin, you will be amazed what a sharp chisel and a random orbital sander with 60 grit sandpaper can fix. DuraTex will hide the rest! Lookin' good so far!

+1
Personally, I think the grille will not look as good, in this case, than if you were to use the idea that DJPhatman suggested.

She's almost there. I don't have any crossover parts or Duratex yet so it'll be a bit before it is finished proper, but a few mounting strips and some back braces and the construction will be done . It has a lot of small problems, but it passes the 6 foot eyball test which has me pretty pumped.

http://s342.photobucket.com/albums/o432 ... 20speaker/

You are so close! I hope you are excited! Now is the time to spend on making the cabinet look pretty. Give it a good sanding with 60 grit, fill in the uglies with "bondo" and sand that down, then go ahead and prime it if you want to. Mmmmmm Jack 10 goodness!