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What to do with a 3/4 step loop at the Cerveny CFB 354? Use as a very long 2. valve loop (half step)?

I know English isn't your first language, but it is a little hard to tell what you are asking.

Can you say it another way?

Hello,

First, I am not familiar with the 654, but it appears to be a 6 valved tuba. Typically on a 6 valve instrument there is a long whole step and a long half step valve (I have known these as the 5th and 6th valve respectively). Both of these valves are typically used in combination with other valves to avoid a sharp combination.

example: 123 for B natural is typically sharp and requires a large amount of slide pull. 24 also requires a small slide adjustment. Take into consideration that 523 or 64 (using my above convention) will build in the side pull to the total length used.

There are many other examples where the 5th and 6th valve help improve the overall intonation of the insturment, but they are typically used in the lower register, where more valves are in play.

I hope I understood your questions! (and I guess I missed that whole quint valve thing... I'm an idiot)

bort wrote:I know English isn't your first language, but it is a little hard to tell what you are asking.
Can you say it another way?

Please look here:

http://www.cerveny.co.at/tuben/f_tuben/cfb654-6m.php" target="_blank

>>5.Ventil erniedrigt um 3/4 Ton, linke Hand<<

Is it not unusual, to extend for a 3/4 note?

Thanks... in that case, I think it's what Ben is describing, this is more or less like the 6th valve on a normal F tuba.

The 654 is also a little different, in that the 6th valve is on the right hand, and it is a "quint valve" (a perfect fifth). That opens up all sorts of different valve combinations, and my guess is that this combination (quint valve and 3/4 tone) makes more sense than another combination of quint valve plus something else.

Several people here have owned (the same) CFB-654 over the past 10 years or so, and could possibly give some thoughts and details about the valve configurations.

Also, I believe this video shows one of these tubas in action:

The very rare tenor cimbasso

bort wrote:Also, I believe this video shows one of these tubas in action:

Thank you, bort, I also think, it is a CFB 654.

Tomorrow, I'll go to test an elderly 654- and buy? Probably!

Very cool! Post a few pictures after you get it, those are very uncommon tubas!