Re: [TCML] Primary angles

[Sfxneon@xxxxxxx]

Then is it feasible to wind the primary right on the secondary coil form  
below the secondary windings? Or use a reversed cone primary to get the outer  
windings below the bottom of the coil? Any advantage/disatvantage to either,  
other than the additional height? 
 
Tony Greer

In a message dated 11/28/2008 2:35:06 P.M. Central  Standard Time, 
Gary.Lau@xxxxxx writes:

I'm not sure there's any reason to use any primary geometry other than  a 
flat one, regardless of secondary size or power.  It may seem that  there's some 
efficiency to using a conical primary - that it somehow "focuses"  or directs 
the primary energy towards the secondary more effectively than a flat  primary 
does.  But it doesn't.  All that matters is achieving the  correct (not too 
high, and not too low) pri-sec coupling, and this is equally  attainable with a 
primary of any shape, simply by adjusting the vertical  relationship between 
the two coils.  One just needs to choose a mechanical  design that will allow 
for this adjustment, at the onset of the  project.

Using a steep conical primary may result in having the top of  the primary 
within striking distance of the topload, and a helical (cylindrical)  primary 
may result in overcoupling.

Regards, Gary Lau
MA, USA
 
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