[TowerTalk] One off balun question

[Steve Hunt]

With 7 turns of RG58 on four stacked FT240-31 cores I measure 298uH. 
That's broadly consistent with Fair-Rite's published figure for the 
Initial Permeability (1500).

Steve G3TXQ



On 30/10/2014 10:22, Jim Thomson wrote:
> ##  I realize the uh, measured at low freqs tells me little about the 
> CM Z of a choke.  I was just interested to know how much uh you folks 
> are seeing on these bigger  CM chokes, where 5-15 turns of coax are used
>