RE: [Hornlist] Dirty Valve Story
The problem with the water film lubrication theory is that it's not only the valve bodies that can corrode. My Finke had a lot of blue-green corrosion in the tubes next to the valves. I had the horn cleaned--no acid. Thank you Ken Pope. Ken said to use oil to prevent corrosion. Herb Foster --- Loren <[EMAIL PROTECTED]> wrote: > "Finke uses carbon fibre valves." > >I am not sure carbon fibre is exactly correct. As I understand it, the > rotors are a carbon based polymeric plastic. Unlike brass, this material is > very resistant to wear and much lighter. Therefore, Finke rotors are > cylindrical and not tapered as they don't have to correct for wear over > time; thus proper alignment of the rotors to the valve tubing is maintained > over time. Normally the condensation that forms keeps these rotors > lubricated, an occasional drop of light piston oil prevents the scale from > evaporating water from forming. > > Loren Mayhew > \@() > Finke Horns > [EMAIL PROTECTED] > (520) 403-6897 > > ___ > post: horn@music.memphis.edu > unsubscribe or set options at > http://music.memphis.edu/mailman/options/horn/herb_foster%40yahoo.com > Yahoo! Mail Stay connected, organized, and protected. Take the tour: http://tour.mail.yahoo.com/mailtour.html ___ post: horn@music.memphis.edu unsubscribe or set options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org
RE: [Hornlist] Dirty Valve Story
"Finke uses carbon fibre valves." I am not sure carbon fibre is exactly correct. As I understand it, the rotors are a carbon based polymeric plastic. Unlike brass, this material is very resistant to wear and much lighter. Therefore, Finke rotors are cylindrical and not tapered as they don't have to correct for wear over time; thus proper alignment of the rotors to the valve tubing is maintained over time. Normally the condensation that forms keeps these rotors lubricated, an occasional drop of light piston oil prevents the scale from evaporating water from forming. Loren Mayhew \@() Finke Horns [EMAIL PROTECTED] (520) 403-6897 ___ post: horn@music.memphis.edu unsubscribe or set options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org
Re: [Hornlist] Dirty Valve Story
Finke uses carbon fibre valves. -William In a message dated 5/13/2005 1:03:20 P.M. Central Daylight Time, [EMAIL PROTECTED] writes: Holton & E. Schmid & the rest could just make the rotors & casings of corrosion-resistant alloys, no? Way too simple, eh? -- Alan Cole, rank amateur McLean (Fairfax County), Virginia, USA. ___ post: horn@music.memphis.edu unsubscribe or set options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org
Re: [Hornlist] Dirty Valve Story
Holton & E. Schmid & the rest could just make the rotors & casings of corrosion-resistant alloys, no? Way too simple, eh? -- Alan Cole, rank amateur McLean (Fairfax County), Virginia, USA. ~ At 01:42 PM 5/13/2005, you wrote: With all the talk of dirty, gummed up valves, I thought I'd share my personal experience of another cause of gummed valves. I was lucky enough to witness a demonstration of taking apart a rotary valve from Bob Osmun several years ago. I decided it didn't seem too hard, so I took apart my Holton 177 to see how dirty the valves were. I hadn't had any work done on the horn in more than 15 years and I'm not all that great at cleaning the instrument- once a year if it's lucky. To my surprise the valves were spotless. I oil the rotor bearings daily but never put oil inside the horn. Then I bought my E. Schmid the following year. Within a single year, the 3rd valve and descant valve was getting sticky. I took it into the shop (I don't do my own valve work with the Schmid) and to my bewilderment, the valves were completely filthy- green and nasty! They cleaned it out and it was working fine. About 18 months later, they started getting sticky again. I thought maybe it was due to different metals used in the horn, etc. I used the same oil and followed the same procedures as my other horn- other than I cleaned it more often! I think I finally realized the problem. My fancy new Marcus Bonna Travel case stores the instrument with the valves DOWN. This means that all the moisture that I don't get out of the horn ends up gathering right where you don't want it to be. My ancient Holton case stores it with the slides down at an angle- any moisture would drain in the slides rather than the valves. So now, I keep the Bonna case on it's side rather than upright. I'll let everyone know in a couple of years if my theory is correct. John Wunderlin -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.9 - Release Date: 5/12/2005 ___ post: horn@music.memphis.edu unsubscribe or set options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org
[Hornlist] Dirty Valve Story
With all the talk of dirty, gummed up valves, I thought I'd share my personal experience of another cause of gummed valves. I was lucky enough to witness a demonstration of taking apart a rotary valve from Bob Osmun several years ago. I decided it didn't seem too hard, so I took apart my Holton 177 to see how dirty the valves were. I hadn't had any work done on the horn in more than 15 years and I'm not all that great at cleaning the instrument- once a year if it's lucky. To my surprise the valves were spotless. I oil the rotor bearings daily but never put oil inside the horn. Then I bought my E. Schmid the following year. Within a single year, the 3rd valve and descant valve was getting sticky. I took it into the shop (I don't do my own valve work with the Schmid) and to my bewilderment, the valves were completely filthy- green and nasty! They cleaned it out and it was working fine. About 18 months later, they started getting sticky again. I thought maybe it was due to different metals used in the horn, etc. I used the same oil and followed the same procedures as my other horn- other than I cleaned it more often! I think I finally realized the problem. My fancy new Marcus Bonna Travel case stores the instrument with the valves DOWN. This means that all the moisture that I don't get out of the horn ends up gathering right where you don't want it to be. My ancient Holton case stores it with the slides down at an angle- any moisture would drain in the slides rather than the valves. So now, I keep the Bonna case on it's side rather than upright. I'll let everyone know in a couple of years if my theory is correct. John Wunderlin ___ post: horn@music.memphis.edu unsubscribe or set options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org
