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Author Topic: Bach axial valve quality?...  (Read 812 times)
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greenbean
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« on: Dec 26, 2017, 12:20PM »

I am wondering how the axial valves in modern Bach 42's are?...

I know some of the new ones have an Infinity valve.  I am asking about 42's made just a few years ago that seem to have a more traditional Thayer-type valve. 
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Burgerbob

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« Reply #1 on: Dec 26, 2017, 04:06PM »

Good, if set up right. They can always be worked on, and if necessary, re-cored to bring them back to spec.

42Ts (before 42AF) are some of my favorite trombones.
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Conn 60H, ditto
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daveyboy37

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« Reply #2 on: Dec 27, 2017, 07:38PM »

The 42T's were using OE Thayer valves before the switch to the Infinity Valve. In the early years they did not set them up right, but by the mid 2000's they were doing it right, so they should be good.

Eventually though, all things do wear out. Early Thayer valves that bach used were Teflon coated aluminum I believe. Later on they moved to Anodized aluminum. Works great but once the coating is compromised, the aluminum can corrode. Also unlike some other axial flow valve designs, the OE Thayer valves do not have a replaceable spindle bearing, so once that goes, you need to replace the whole valve.

So, before buying, definitely get a look at the valve core.  Also check the valve for end play and bearing slop.
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David Sullivan
Bass Trombone - Livingston Symphony Orchestra
Horns: Bach 39, King 3B, Yamaha YSL-640, Bach 42T, Kanstul 1570CR, Kanstul 1588CR, Yamaha YBL-612RII
MPCS: Faxx 7C, Hammond 11ML, Laskey 59MD, Laskey 85MD.
greenbean
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« Reply #3 on: Jan 05, 2018, 04:23PM »

Well, the horn in question arrived.  This was a trade I took in.  I was nervous because I don't have much experience with Thayer valves.  I briefly owned a Kanstul with a Thayer-type valve that I though was pretty good.  But that is it.

Anyway, this is a very nice horn.  2012 vintage in minty condition. Gold brass bell, O.E. Thayer valve, and perfect slide.  So, perhaps the model number would have been 42GT.  The valve seems to be in great shape and feels great.  It is a beautiful player and the blow is great on both sides of the horn.  I have been using a Greg Black NY 3.5 and sound is... big and beautiful.  Trigger and pedal ranges are great.  And the low C is in tune!
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Burgerbob

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« Reply #4 on: Jan 05, 2018, 06:49PM »

Not surprised!

It would be a 42TG, if it came with a stock slide. LT42TG if it's a light slide.
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Brasslab 50T3, Greg Glack 1G .312 #2
Bach 50B, ditto
Bach 50B2, ditto
Conn 60H, ditto
Bach 42B, Greg Black NY 1.25
Bach 42BG, ditto
Conn 6H, Yamaha 48
Yamaha YEP-842S, Schilke 53/59
Yamaha YBH-301MS, Hammond 12XL
EdGrissom

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« Reply #5 on: Jan 06, 2018, 05:53AM »

I had a 42T from about 2010 that was one of the best horns I ever played.  No valve problems at all.
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"If a tree falls in a forest and no one is there to hear it, does it still make a sound? If a man makes a statement and no woman is there to hear it, is he still wrong?"
Bach42T
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« Reply #6 on: Jan 06, 2018, 11:00AM »

I have the LT42T with factory press-fit leadpipes from 1998, it's minty too.  I am trying to preserve it since it has the original Ed Thayer (with the signature script) that Bach had got from Ed Thayer himself.  I haven't played it much since graduating college in 2001 although I used it everyday in college. 
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