Quote: (Originally Posted by Pierre Farrugia)
Dave shaw used HH handsets filled with oil and due to a leak before the dive he still had a problem. About the 180m buzzer problem, if I can recall good about a year or so 3 Germans tried to go past the 180m mark and all 3 units failed at 220m if I am not mistaken! They were even warned by ADP about this! Maybe Mario can say something about this as he was doing a modification!
Yes, the German guys haved 2 differents problems:
the Inspo Buzzer has a dry sealed chamber (impossible to fill with any kind of liquid, I haved open one of this!) that collapse under the pressure and generates a shortcircuit.
The other problems was that at about under -220mt depth (23bar) its impossible to read the handsets because the pressure crush the liquidcristal display.
Now, I have modified mi inspo buzzer with a new kind of non sealed electronics buzzer (avoid pietzoelectric buzzer, because they products sparks!!!) in a new buzzerbox!
Ciao
Mario