[R-390] Collins R 389 PTO

[Flowertime01 at wmconnect.com]

Don,

Points accepted.
It was just an idea.
We ain't likely to be making our own cores.

Roger AI4NI

> 
> 
> 
> 
> 
> Roger wrote:
> 
> >Down the other path, what are the chances of mixing core stuff and epoxy 
> to
> >make a new core?
> 
> Not a chance.  For little repairs, yes, but not a whole core (or even 
> a decent chunk of one).  The thing to do is find a lump of the right 
> ferrite that is bigger than the core, then machine it to 
> size/shape.  If someone shipped a good 70H-1 core to Magnetics, they 
> could probably help to reverse-engineer it.
> 
> >Then we would have to do a new coil form and wind a coil.
> 
> The coils and forms should be salvageable, even if they're 
> broken.  If not, one could relatively easily duplicate the coil and 
> form if they had a good one to copy.
> 
> >I cannot imagine how many test coils would need to be wound to get the
> >inductance and linearity close enough to be usable.
> 
> I wouldn't dream of trying to re-engineer a PTO that would meet 
> original specs.  But I would copy whatever is necessary to repair one 
> to the original design.
> 
> Best regards,
> 
> Don
>