Proton Extreme ice

[ahava]

I have a V32 Proton Extreme Ice a little over a year old. Last month on a trip to the bahamas I had a very loud high pitched hum or howl coming from the 1st stage when tank pressure got to 1000 psi. Definatly 1st stage because it made noise with octo also. If I put my finger on top of enviormental kit I could feel the vibration from the noise. If I pushed down on top where the gel is the noise would be significatly reduced. 2 dives at almost exactly 1000psi. problem occured. In fact it was so loud divers 15ft away could hear it. After that switched reg assy. Any ideas? Thanks

 

[Greg Barlow]

I have a V32 Proton Extreme Ice a little over a year old. Last month on a trip to the bahamas I had a very loud high pitched hum or howl coming from the 1st stage when tank pressure got to 1000 psi. Definatly 1st stage because it made noise with octo also. If I put my finger on top of enviormental kit I could feel the vibration from the noise. If I pushed down on top where the gel is the noise would be significatly reduced. 2 dives at almost exactly 1000psi. problem occured. In fact it was so loud divers 15ft away could hear it. After that switched reg assy. Any ideas? Thanks

My guess is that it is spring harmonics in the first stage HP poppet assembly. It could also be a lubriction issue with the HP poppet stem.

Greg Barlow