On 07-29-96  10:01, Elvis Hargrove was overheard saying to Alec Cameron, 
 "About OOPS!..." 
 
Hiya;
 
 -> B Boveri also supply the railroad 1500v dc steel tank pumped
 -> rectifiers
 EH> 
 EH> What the heck is THAT?  Sounds ominous!
 
Not sure, I havce heard of a lot of different kinds of rectifiers, but not
that one.
 
 -> 50 cycles, three or six phase. I *imagine* that the contacts were
 -> carbon and that the synchronising was such that overlap, put most of
 -> the sparking on the transformer primary circuit, the LV side contacts
 -> moving at zero current.
 EH> 
 EH> Jeeze, I think I need a diagram.....  SIX phase syncronous zero
 EH> crossing makes my HEAD HURT!  What drove the contacts?
 
A syncronous motor, most likely.
 
 -> Here, auto radios were a novelty until about 1946. The synch and
 -> asynch vibrators, were standard then.
 EH> 
 EH> I had a 1937 Chevy sedan that had a "Factory" radio in it.  I suspect
 EH> all of them were actually dealer installed, but it had been in it
 EH> since new.
 
Ah yes!  Asynch vibrators and OZ4's!  A page out of my past!  The first job
I ever had was repairing car radios back in 1959.  When someone came in
with a car radio problem, I would grab a toolbox with an OZ4 in addition to
the hand tools and head for the door.  That cured 95% of them!
 
Take care...
   Ivy
 
 
 
... Bad dog!  Don't chew on the power coâëçü‡’ NO TERRIER
 
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