Baritone Project/Bore Size Question

[Tubajug]

One of these days I'm going to try and add a 4th valve to a cheap-o Reynolds baritone I bought off ebay a while back. My question is about bore sizing.

Does anyone know the approximate bore sizes of the various three-valve, bell-front baritones of various makers? Reynolds, Olds, King, Conn, etc. I'll be looking for another cheap baritone to harvest for the extra valve and tubing and was hoping to find either the same bore size or slightly larger for the 4th valve.

This is just an experiment to see if I can do it. I've also got aspirations of making both an upright and forward bell for it (the one I have has a detachable forward bell already), so I'd probably have to buy two more baritones, one for the tenon to use and one for the upright bell. But we'll see about that.

Thanks for any help you can offer

[Bob Kolada]

.560-ish

A rotary valve is another option.

[PMeuph]

You could use a valve off of a trombone. It would already have the right length of tubing...

[Tubajug]

You could use a valve off of a trombone. It would already have the right length of tubing...

.560-ish

A rotary valve is another option.

Yep, or add both.

Now there's a thought...I do have a Chinese F attachment/bell section from a trombone hanging on my wall...

I wanted to add the 4th piston just to see if I could, but heck, I could make it a 5-valve since I'd have the parts... This could get interesting...

[aqualung]

Buy some calipers. You'll need them to do work like this.

[Tubajug]

Buy some calipers. You'll need them to do work like this.

Got 'em! Thanks.