[TCML] Coupling of oil insulated coils

[Barton B. Anderson]

As some of the others mentioned, Terry Blake did this with a 4.5" coil. 
But, he used standard coupling about 0.13 although did run some decent 
power through the 4.5" diameter coil. Still had some racing sparks down 
the outer acrylic tubing. But, this a very thin layer of coil between 
the two tubes (1/8").

Take care,
Bart

FutureT at aol.com wrote:
>  
> I remember that Lou Balint built magnifier drivers submerged in oil,  but
> he used ferrite rings at the center to increase the flux and  the
> coupling.  Seems the oil did help to improve the insulation, but some  arcs
> occurred anyway at
> times I think.  I don't remember if he actually measured the coupling  and
> determined if it was higher than an air-insulated magnifier.  I also  don't 
> know
> what the overall effective coupling of the system was.  Nor do I know  if
> the efficiency was improved.  The driver was very compact and that  may
> have made it more difficult to deal with.  Also the type of ferrite  may not
> have been optimal for the frequencies and power levels involved.  It  may
> have saturated.  
>  
> I also remember someone else mentioning that they planned to test
> an oil emersion classic TC, but I never heard any follow up.  
>  
> If someone has a small coil especially if it is the type that  has
> the gap, xfrmr, capacitor, etc. off to the side separate from the
> primary/secondary, then it would be easy for them to measure
> the closest tolerable coupling in air, then place the unit into a
> plastic oil filled pan, and then try tightening the coupling.  
> Maybe someone will do that.  
>  
> John
> ----
>  
>  
>
>   
>> Hi  John
>>     
>
> <Jeff Behary has with his flat coils prior to moving to  impregnating the 
>   
>> coil(s) in wax. Not sure if anyone has done this with  a helical coil.
>>     
>
>   
>> Take care,
>> Bart
>>     
>
> FutureT at aol.com  wrote:
>   
>>> Bart, all,
>>>  
>>> Has anyone on  this list built a TC and put the coil  partly
>>> under oil or  another dielectric fluid to see how  much coupling 
>>> could be  tolerated?  It would  be an interesting  experiment.
>>>  
>>> John
>>>       
>
>
>
>
>
>
>
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