[Elecraft] KX3 with BL2 Question

[David Woolley]

On 05/10/17 14:19, John Oppenheimer wrote:

> The Balun, both 1:1 and 4:1 is modeled with a perfect conventional
> transformer block "A." The KX3 ATU is modeled with the L-C network block
> "LC1." A five foot RG-58A/U between the Balun and KX3 is added.

A perfect transformer is not a good model for two reasons:

1) The number of turns is too low to have a leakage inductance that is 
large enough to ignore, especially at lower frequencies; I think this is 
particularly true for the 4:1 configuration;

2) The general wisdom seems to be that you want a lossy core, so that 
the common mode current sees more of a real than imaginary impedance.

-- 
David Woolley
K2 06123