[Elecraft] two k3's on the same band

[Jim Brown]

On 3/21/2012 3:33 PM, Al Lorona wrote:
> Some time ago an advertisement for coax cable in QST said that a certain cable had "80 dB shielding".

I'd call that an advertising claim. Real specifications for this are 
quantities like the Transfer Impedance, which is the ratio between the 
differential voltage inside the coax as a result of current on the 
outside of the coax. That ratio varies a LOT as a function of 
frequency.  The lower the value of that transfer impedance, the better 
the shielding.  The lower limit on the transfer impedance is the 
resistance of the shield.

73, Jim K9YC