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Discussion in 'Trumpet Discussion' started by bumblebee, Apr 13, 2014.
Interesting. Didn't know that Olds made pin valves.
I may be using wrong term. The valve guide has the "pin" that fits in the slot of the spring barrel.
This has reminded me of an old Henri Selmer Cornet I have, exactly the same problem except in the 1st valve, only hangs on the return when I play it. My tech has had it for a chem clean, even went as far as a light hone of the casing with no result.
I suspect there has been a valve job done on it at one time as the spring box has been nickle plated. The compression is good and the valve seems free enough, no side play and rotates freely throughout its travel. This is the only one of my horns I have had this problem with.
Using proper terminology is important. "The valve doohickey has the thingy that fits in the thingamabob of the thingamajig." Put this way, even a spouse can understand it.
AND, soak that sucker in acetone (don't forget to clean the ports)!
Ah, yes. A pin valve has a guide pin in the side of the valve body that travels in a long slot in the casing. Bottom sprung.
So, yes, not what you were talking about.
I spoke to the repair tech who fixed the Martin up for me - he assured me he did not let any lacquer into the valve casing, and I believe he is one of the best people to send a trumpet to also. He made several suggestions to me already repeated here, and he singled out using toothpaste to lap the valve as his best option once I'm sure I've actually cleaned the horn well.
Did you use the acetone / nail polish remover? I would do that before "lapping" with toothpaste. Acetone is a chemical process. Toothpaste is an abrasive process.
I am not rushing to use toothpaste - my next step is to do another clean, using the most effective stuff I can. The valve moves really freely when I don't blow, so I am sure I'll work something out before I'd have to resort to mechanical changes.
I suspect a loose fitting (worn )piston. But check and make sure the through-piston air vent is not blocked.