Miraphone valve venting

Bob Kolada · Post by **Bob Kolada** » Thu Jan 28, 2010 1:54 am

Does Miraphone vent the valves on any of their current models? I have read "hit or miss" on older ones, but don't know anything about their current practice.

pwhitaker · Post by **pwhitaker** » Thu Jan 28, 2010 6:14 am

The 5 valve BBb 1291 I bought new in 2006 had both the 3rd and 4th valve vented IIRC. Since I only (and rarely) pulled the 1st slide this didn't seem to be very useful.

bort · Post by **bort** » Thu Jan 28, 2010 7:35 am

My 1291 CC (made in 2004 or 2005) has all 4 pistons vented. I assumed this was stock, and just another feature of the 1291 I like!

bububassboner · Post by **bububassboner** » Thu Jan 28, 2010 7:39 pm

All six valves on my Firebird are vented.

tubatom91 · Post by **tubatom91** » Thu Jan 28, 2010 8:36 pm

I've yet to see a miraphone rotary CC with stock vented valves.

Bignick1357 · Post by **Bignick1357** » Thu Jan 28, 2010 9:14 pm

I have an 80 something 186 and none of mine are vented

jeopardymaster · Post by **jeopardymaster** » Fri Jan 29, 2010 8:45 am

tubatom91 wrote:I've yet to see a miraphone rotary CC with stock vented valves.

You must not get out much.

UTSAtuba · Post by **UTSAtuba** » Fri Jan 29, 2010 9:13 am

I had a '74 Mirafone 186 5U CC that had (from what I can tell) factory vented valves. The previous, and first, owner gave me no indication that he had done this himself.

Joseph

tubatom91 · Post by **tubatom91** » Fri Jan 29, 2010 10:06 am

jeopardymaster wrote:
tubatom91 wrote:I've yet to see a miraphone rotary CC with stock vented valves.
You must not get out much.

I've seen a lot of horns, of all the Miraphones I've played only the F's had stock vented valves. My 188 needs them pretty bad, subtle temperature changes make them go "pop" when I want to play, so I'm constantly fiddling with the valves clearing the pressure.

jeopardymaster · Post by **jeopardymaster** » Fri Jan 29, 2010 2:38 pm

My 184-5U CC was delivered to me new in December 1974 with all valves vented at the factory. Serial number is 9275.

windshieldbug · Post by **windshieldbug** » Sat Jan 30, 2010 11:55 am

jeopardymaster wrote:My 184-5U CC was delivered to me new in December 1974 with all valves vented at the factory. Serial number is 9275.

My 184-4U CC was delivered with all valves vented in 1974, also. Serial number 9136.

iiipopes · Post by **iiipopes** » Sat Jan 30, 2010 12:12 pm

Next question: has anybody seen factory vented valves on rotary instruments that also have the little set screws like on the bottom valve caps so the casings can be closed off when desired?

PWtuba · Post by **PWtuba** » Sat Jan 30, 2010 7:17 pm

pauvog1 wrote:I've seen meople mention venting valves, but I'm not familiar with this. What does this mean?

There are small holes drilled in the valve which prevent pressure build up. Ever pulled a slide without pushing the valve, and heard the pressure build up, followed by a 'pop' when you push the button? That is eliminated with vented valves.

TubeNet

Miraphone valve venting

Miraphone valve venting

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