@stephanurus Does water run through it?

@kehaulani Thank you for clarifying. I was sure that some kind of misunderstanding had occurred.

FWIW - The plating appears to have worn off the valve block, possibly the result of having a valve guard on it long enough to cause damage, and it often doesn't take long for a valve guard to ruin the finish underneath it to some degree. Some people don't mind the wear; others would want to deal with the situation. If left alone, oxidation will continue, although eventually patina will develop to slow this process. It's likely you'd have to deal with the smell of brass on your hands, and there's also the likelihood that there is a small amount of lead in the brass that can contaminate your skin. The more expensive the solution to the corrosion, the more effective the result. Replating would be ideal, but not cost-effective. Compromises include lacquering or waxing the area.

Overall, if this trumpet has good valves and it plays well, the price looks pretty fair. At this price, I wouldn't let the appearance prevent me from buying it. I'd try to negotiate for a lower price, though, just to see if it would be possible to pay less.

@walter-sk Microns separate easy and hard removal. It is still a simple job for a tech but "all your strength" could make the repair very costly.
I have had students with this problem. It can happen if one lays the trumpet down with the 2nd slide underneath. It takes a small hit (no dent) and it is microns out...

@SSmith1226 said in Clean with 'alcohol'?:

@Dr-GO

As far as modern, scientifically documented data, there are literally numerous peer reviewed studies, for example showing that soap and water, is far more effective than alcohol based hand sanitizers for prevention of Clostridium Difficile infections in a hospital or office setting.

AD841668-BA80-4E6F-9BF3-71A0FAD97CA1.png

Hand washing with soap and water is significantly more effective at removing C. difficile spores from the hands of volunteers than are ABHRs. Residual spores are readily transferred by a handshake after use of ABHR.

Thanks for understanding.

I could not agree more on this subject. Because of C. Diff... soap is all I use going in and out of all rooms. AND lest one forget, the soap wash must be done for at least 20 seconds (the time it takes to sing "Mary has a little lamb"). This I taught to all of my medical students before I took them into the Neonatal Unit to teach them how to perform the Newborn exam.

@Jolter When I first heard it I heard extra C G C G. Turns out it was an oops in my playback! So sorry for this.

Consider the possibilities:

Are the 2 bells the same length?

Do they have the same initial bore and outside diameter (to fit into the existing ferrule)?

Do they have the same "wrap" (vertical height between the bell tail and the bell flare)?

If the answer to all these is yes, the bell will fit. As to how it will play, that will be a matter to determine once the new bell is mounted.

If the answer to one or more of these is no, a decent tech can probably mount the new bell anyway.

A lot of words to just say "yes".

@chelpres
My B47 is one of its predecessors. Holton made some great horns

@tjveloce said in The new Martin Committee "thread" from a TM emigrant:

@Dr-GO Ah! So was it too loose? If so, then what he did was knurl it, which raises the surface just a bit. Engine builders do this to pistons sometime to help them retain oil on the skirts.

-tj

Yes. Too loose. Glad you could interpret what Gary did to it by the picture. It now fits snug and works great!