Sousaphone Bit Question

[Tubajug]

I recently had a Holton sousaphone fixed up so my students could use brass sousies instead of fiberglass ones. When I put two bits in it, it played WAAAY flat. It plays closest with no bits at all. Is that at all normal? I always thought every sousaphone had to be played with two bits. Any thoughts?

Thanks

[Tubajug]

After looking at your picture bloke, no, it does not have that neck nor does it have those bits. I snapped a few pictures of the horn (we're playing at a basketball game as I write this). I seem to recall seeing a neck and bits like that in my box o' bits. I'll have to look later. But yes, I did play it and the temp was probably mid 70's in our music room.

Here are the pictures:

[Tubajug]

I went and found the neck and bits, but then took a closer look at the horn, and someone had indeed replaced the receiver:



I guess this one will play without bits!

I did find the right neck and bits though right?

[Tubajug]

Mystery solved! Thanks bloke!

I guess this one will go bit-less. I am surprised that the difference in length is two bits-worth (I could get a shave and a haircut for that!).

[WilliamVance]

One solution could be to have your Conn style neck cut down. Then you won't have to change out the receiver. I had one cut down for my "conn'd" Martin Sousa and it plays great with the modified neck. I would say about as we'll as my Martin tuba that uses the genuine bits. I notice some coincidences with your holton (collegiate) and the one I'm working on right now, like the weird patch/issues with the receiver and tube right below it.