venting valves

gary · Post by **gary** » Tue Jul 09, 2013 5:54 pm

Has anyone played a PT-10 with vented valves?

bububassboner · Post by **bububassboner** » Wed Jul 10, 2013 9:33 am

I vented the valves on my B&S symphonie. Slurring became easier after I vented them so if you are thinking about it I say do it.

eupher61 · Post by **eupher61** » Wed Jul 10, 2013 9:49 am

1st valve on a PT 10 rotary, yes. For 25 years now. No issues. I have no need to vent the others, aside from pulling to drain the moisture, the pitch really doesn't require it. Actually, I don't even move the first valve much now, I use 3 for anything but any D and it's nearly spot on.

A big consideration: do you have a mouthpiece with the proper taper in the shank? That makes a world of difference; many mouthpieces don't sit close enough to the gap. Anytime I play a different mouthpiece it takes a bit to get used to the tendancies. But, I've used this same mouthpiece for at least 20 years with this taper and all, so it's sort of automatic for me.

luke_hollis · Post by **luke_hollis** » Wed Jul 10, 2013 4:14 pm

I vented my valves (Nirschl 4/4) and did not notice any difference in how it plays but slide pulling is possible without a pop. I am curious about why the prior post indicates slurring is better? I can't see why slurring would be any different.

Radar · Post by **Radar** » Wed Jul 10, 2013 5:11 pm

I've seen references to valve venting before, but I'm not familiar with what valve venting involves. Can anyone clue me in as to what valve venting is all about?

gary · Post by **gary** » Wed Jul 10, 2013 7:01 pm

Thanks everyone for your input, except the first guy.

What I'm hoping to accomplish with the venting is to get rid of the "ch" sound I sometimes get between slurred notes.

Jay Bertolet · Post by **Jay Bertolet** » Wed Jul 10, 2013 8:56 pm

The internet is a wonderful thing!

http://www.osmun.com/services/tbaserv.htm" target="_blank" target="_blank

jeopardymaster · Post by **jeopardymaster** » Wed Jul 10, 2013 11:40 pm

Warmer air expands inside the tubes, cooler air contracts. I find the biggest benefit for venting is to enable the pressure to equalize, eliminating those squeefy pops when you press the valve for the first time in a while - regardless of whether you pulled the slide or not. And the bigger the bore, the more it seems to matter.

bububassboner · Post by **bububassboner** » Thu Jul 11, 2013 6:17 am

jeopardymaster wrote:Warmer air expands inside the tubes, cooler air contracts. I find the biggest benefit for venting is to enable the pressure to equalize, eliminating those squeefy pops when you press the valve for the first time in a while - regardless of whether you pulled the slide or not. And the bigger the bore, the more it seems to matter.

This is why I vent all of my horns. It's a simple process that makes any horn just a little bit easier to play. Why wouldn't you want your horn to be easier to play?

hup_d_dup · Post by **hup_d_dup** » Thu Jul 11, 2013 9:15 am

gary wrote: What I'm hoping to accomplish with the venting is to get rid of the "ch" sound I sometimes get between slurred notes.

If this is a problem caused by the instrument, not by you, it is more likely to be corrected by valve alignment than venting.

(my opinion)

Hup

jeopardymaster · Post by **jeopardymaster** » Thu Jul 11, 2013 12:37 pm

If this is a problem caused by the instrument, not by you, it is more likely to be corrected by valve alignment than venting.

Which way the rotors turn could matter as well, I suppose.

TubeNet

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