So I discovered that after boiler temperature stabilizes on my LP Europiccola, it begins to "sing". It's pretty cool! It sings in an F!

I was curious if anybody else's Pavoni emits a gentle pitch that is enjoyable to listen to (I've actually used it as a base to play through a song in F, pretty funny).

Do any other levers sing?

Maxwell,

That is cool! I really like the gentle hissing of my '76 Pavoni. I never really thought of it as a tone, but you know what? Mine emits an F as well. I got out my guitar to see and I would have bet a bunch of money that my little gal sings in a different key than yours, but I would have lost that bet. F it is. My manometer was reading exactly .75 bar.

Maybe Ray can play a tune with his adjustable pressure valve!

Pete

I think that this occurs because the natural frequency of the "bell" shaped cup surrounding the pressure release valve seems to have natural frequency very near F if you tap it.

This is interesting. I wonder if there be enough variation in manufacture to make different ones have significantly different natural pitches.

Hello:

Maxwell Mooney wrote: ... after boiler temperature stabilizes on my LP Europiccola, it begins to "sing".
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Do any other levers sing?

Yes, my Europiccola (La Pavoni 'Shirley' / AR made in the late 60's) also starts to sing once stable.

But I have found (just by chance) that it will only sing if it is at 14 psi (give or take some) ie: at ~ 1.0 bar pressure. At higher pressures it will hiss furiously but won't let out a note.

As to the pitch it sings in, not a clue. =-/

Cheers,

CIV