captain

That is interesting for sure, may I ask are you running -7 or -15 or -15LFE engines ?

My understanding was that the tubes type were just too unreliable and broke down under the rough conditions of flying hercs.

Tis site learns me new stuff every time I am here

yes of course, some planes they have tybe type related to t56-7 or -15 engines

in my country i have 10 c130h model with vacuum tube type synchrofhaser

during run up of c130h using sunchrophasing propeller [vacumm tybe type] we have somedyring tests

i would like to know the explanation of every test