Is the noise from the second stage? (I’m going with that assumption)
How is that noise like? Metal rattle? “Fart” like? Humming sound lo/hi frequency?
Is it pressurized? Or is there a difference between pressurized vs not?
If you inhale “slowly” / lightly, do you feel 2 different “stages” (change in how you feel the air rushing in)?
My guess is something to do with sticktion, where the diaphragm will vibrate (like a whoopie cushion fart sound) when dry and water tension/pressure stabilize that effect (also very slow breathing will probably eliminate it)
Edit: i might be very mistaken, that’s more of an exhale thing— thoughts any one with more experience
?
If not, I would then ask: when was last service?
My guesses here:
- balanced chamber issue (cracked/ not a good seal/ not well lubricated at oring)
- low lever height
Check this thread out to get a sense of what I mean
Halcyon H75P + Halo (weird?) cranking effort
These can “interact”/ feedback onto each other btw, but I could be off target