[Amps] Real time tests to see if an RF transformer is saturating?

[Manfred Mornhinweg]

Chris,

> I stacked 3 off 78 material cores in the same size as the 77 material
> toroids and wound them with 180 strand speaker wire with a conductor
> diameter of about 2mm.

This sounds like you misunderstood one thing: That speaker wire surely 
has no insulation between the individual strands, and so it will behave 
exactly like a solid wire, in terms of RF performance. To achieve an 
improvement over solid wire you need to have INSULATED strands! And 
ideally they should be woven in a very specific way, so that each strand 
is on the surface and inside the bundle as much as any other strands. 
The Litz wire suggested by Roger is exactly what you want, but it's 
relatively rare and expensive. What's typically done is assembling a 
bundle from many thin enameled wires, or winding with several enameled 
wires in parallel.

Manfred

========================
Visit my hobby homepage!
http://ludens.cl
========================