Have a Bach Mercedes Bell resonating on B flat, much less on E flat. No obvious loose soldering or other issues. Looking for an Amrein tone enhancer or direction to the company as most distributors are out of stock.

They haven't made one in years. Here is the text of a conversation I had with another bone player a while back:

"

Re: Bell vibration

Post by Andyc » Fri Jul 24, 2020 11:28 pm

ssking2b wrote: ↑Thu Jul 23, 2020 11:25 am

There was, a long time ago, a device called an AMEREIN TONE RING. The WWBW had it for a while, and then the only place to get it was from Phil Parker Ltd in London, UK. It seems no one has it now, but you can make one easily! It will stop the ringing without completely deadening your bell. But don't solder it, line the flat side of it with cork and Just slide it onto the bell. Here's how:

Get about 6 inches of the mentioned half round “guard molding”, euphonium size. Line it with a thin cork lining. Shape it like a "C" and slip it onto your bell. Alow it to slide down the bell till the bell flare stops it, then give at a very small downward "screw" to snug it on the bell. Problem solved! And it's removable with NO damage to your bell! Pinch the "C" smaller to catch further up, or open the "C" up a bit to let it sit further down the bell flair.

I have on on my vintage Elkhart 1964 88H and it works great. stopped the bell ringing I had on a G overtone series, yet the horn still plays like an 88H should - not a total dead sound like most current .547 size horns.

I can take pix and post them if you want.

AND HERE IS THE SOLUTION:

The trombone is playing great now, and the vibration is now gone! Thanks for the suggestion! I contacted Ken Pope at www.poperepair.com in Boston, and they were able to make me a tone ring. The horn slots better and seems to project better as well!

A pic and definition of guard molding would help. Thanks

You can also use a standard hose clamp (like one on a car radiator hose) with a little leather or neoprene under it. This has the advantage of using the adjustment screw to change the diameter and move it up and down the flare until you find the sweet spot.

Guard Molding is used most often of euphoniums and tubas to protect the exposed parts of tubing that can be vulnerable to easy denting. Picture the bottom bow of a euphonium.....almost all euphoniums have guard molding on that 180 degree bend. Here is a photo of guard molding from the Votaw Tool Company:

<LINK_TEXT text="https://votawtool.com/collections/sousa ... 4090739847">https://votawtool.com/collections/sousaphone/products/guard-molding?variant=34494090739847</LINK_TEXT>

Sorry -I don't have a picture. These guys will make you one. www.poperepair.com