Valve guide - metal or plastic? - Page 2

Tootsall · 01-02-2007, 04:31 PM

Quote:

Originally Posted by rowuk

Maybe metal is better because it gives a path to discharge the static electricity from those fast moving valves before our lips get a shock.........

So maybe that's why some guys have a wire that usually runs from their trumpet around behind them to a little box clipped to their belts?.... to discharge the static electricity?

Vulgano Brother · 01-02-2007, 05:45 PM

If I remember correctly, the hype with Derlin was that it could be cast (injected) with extremely good tolerances, and provide less wear, noise and friction as metal. So far, so good, but the manufacturers did sloppy work on the parts the valve guides fitted into, on the casing and the valve itself. Result: lots of play. The nice thing about metal guides is they can be milled to fit what they fit into.

Of course it doesn’t matter if your valve guides are plastic or metal if you keep getting chocolate on them, Alex!

Clarino · 01-03-2007, 01:52 PM

The valve guides on my Yamaha Custom Z are metal, and the valves move more quietly than those on my LA Benge, which has nylon guides. The sound is much better on the Yamaha, but that could have more to do with other factors than just the valve guides.

music matters · 01-03-2007, 03:50 PM

I remember someone saying that metal valve guides gave a slightly darker sound than plastic?

My old Yamaha 6335 had metal as standard - I kept the standard metal but a friend with the same horn changed his to plastic and he preferred them. I think my horn did play slightly darker but it could have been a darker sounding horn! I think the only way to find out if metal is better is to try them on that specific horn and compare.

My Bach 37 has plastic, as did my Eclipse.

Graham.

rowuk · 01-03-2007, 07:02 PM

I'll bet it is the combination of guide material AND the valve oil that changes the sound. I've heard that Al Cass/metal guides works better for mere technicians.........
Alexes belgian chocolate valve oil sounds sweet with any valve guide!

TrumpetJimmy · 01-03-2007, 09:05 PM

I have had the same experiment on my 6340ST Yamaha which came with plastic. I placed the metal valve guides in the horn and the horn seemed to resonate more. It had an overall better sound as well. Just to make sure the switch was no fluke I removed the metal guides and played with the plastic for a month or so. I made the switch again to the metal and I had the same results. Do I think this will be the case with all horns? no...but all horns are different. I know the 6340 likes the metal.

01-02-2007, 05:45 PM	#12 (permalink)
Vulgano Brother Moderator Fortissimo User Join Date: Mar 2006 Location: Home Posts: 3,290	Re: Valve guide - metal or plastic? If I remember correctly, the hype with Derlin was that it could be cast (injected) with extremely good tolerances, and provide less wear, noise and friction as metal. So far, so good, but the manufacturers did sloppy work on the parts the valve guides fitted into, on the casing and the valve itself. Result: lots of play. The nice thing about metal guides is they can be milled to fit what they fit into. Of course it doesn’t matter if your valve guides are plastic or metal if you keep getting chocolate on them, Alex! __________________ "A tool good enough to be so used and not too good" C.S. Lewis That Hideous Strength www.letsbuildhope.org

01-03-2007, 01:52 PM	#13 (permalink)
Clarino Mezzo Piano User Join Date: Nov 2003 Location: Sheffield, England, UK Posts: 644	Re: Valve guide - metal or plastic? The valve guides on my Yamaha Custom Z are metal, and the valves move more quietly than those on my LA Benge, which has nylon guides. The sound is much better on the Yamaha, but that could have more to do with other factors than just the valve guides. __________________ "...you have the perfect C Major chord, with blazing trumpets and inaudible strings." - Daniel Barenboim.

01-03-2007, 03:50 PM	#14 (permalink)
music matters Pianissimo User Join Date: Apr 2004 Location: ON Canada Posts: 226	Re: Valve guide - metal or plastic? I remember someone saying that metal valve guides gave a slightly darker sound than plastic? My old Yamaha 6335 had metal as standard - I kept the standard metal but a friend with the same horn changed his to plastic and he preferred them. I think my horn did play slightly darker but it could have been a darker sounding horn! I think the only way to find out if metal is better is to try them on that specific horn and compare. My Bach 37 has plastic, as did my Eclipse. Graham.

01-03-2007, 07:02 PM	#15 (permalink)
rowuk Moderator Fortissimo User Join Date: Jun 2006 Location: Germany Posts: 4,881	Re: Valve guide - metal or plastic? I'll bet it is the combination of guide material AND the valve oil that changes the sound. I've heard that Al Cass/metal guides works better for mere technicians......... Alexes belgian chocolate valve oil sounds sweet with any valve guide! __________________ Whenever I feel blue, I start breathing again.

01-03-2007, 09:05 PM	#16 (permalink)
TrumpetJimmy New Friend Join Date: Mar 2006 Location: Jacksonville Posts: 7	Re: Valve guide - metal or plastic? I have had the same experiment on my 6340ST Yamaha which came with plastic. I placed the metal valve guides in the horn and the horn seemed to resonate more. It had an overall better sound as well. Just to make sure the switch was no fluke I removed the metal guides and played with the plastic for a month or so. I made the switch again to the metal and I had the same results. Do I think this will be the case with all horns? no...but all horns are different. I know the 6340 likes the metal.

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