[R-390] Clavier IF Module - Ugh !

[Tom M.]

Jay,

All modules were supposed to be inspected by a govt inspector so sounds like
the system broke down.

I suspect your module was an over run and never made it to service.

What is the contract/s.n.???


Tom
--- JamesMiller <jmiller1706@cfl.rr.com> wrote:
> Wow!  Working on a EAC 390a that has a Clavier IF module, ... unbelievable.
> Couldn't get the IF module to behave, occasionally it would slowly loose
> gain then it would come back again.  Plus some strange intermittants.  I
> discovered that one of the IF amplifier tubes would loose filament (making
> the gain go away slowly) then it would come back.  Found that the ground
> lead to the filament pin had not even been soldered at the factory!  Wire
> was looped through the socket pin, but not soldered!  That explained the
> intermittent filament.  Soldered it and that particular problem went away,
> but now another intermittent around another tube.  Again, another pin not
> soldered, and three loose screws holding ground lugs.  While I was in it, I
> did a complete check of all joints, and  found 3 more suspect/cold solder
> joints as well.  Well finally, the IF module works fine now, but Clavier
> must have had miserable quality control!  Didn't they also make electric
> organs?
> 
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