[Elecraft] Elecraft] RFI on K3s

[Jim Brown]

On Tue,6/21/2016 3:05 PM, riese-k3djc at juno.com wrote:
> its silver plated

Which, contrary to the hype from ripoff artists in the high futility 
world will try to tell you, offers NO performance benefit over POC 
(plain, ordinary copper) in even the most esoteric of audio systems.

There's a classic AES Paper from the '70s by E.E. Prof R. A. Greiner 
(now emeritus) who was at Univ of Wis at Madison showing conclusively 
that exotic loudspeaker cables are a complete waste of money, and the 
only thing that matters for real world loudspeakers is low DC 
resistance. In other words, short, fat copper.  The thing it affects is 
"damping factor" -- that is, the ability of the very low Z output stage 
to damp a floppy woofer. Damping factor is, by definition, the Z of the 
loudspeaker divided by the sum of the output Z of the amplifier plus the 
resistance of the cable, and it's low frequencies we're talking about, 
so it's DCR.
There's a classic AES Paper from the '70s by E.E. Prof R. A. Greiner 
(now emeritus) who was at Univ of Wis at Madison showing conclusively 
that exotic loudspeaker cables are a complete waste of money, and the 
only thing that matters for real world loudspeakers is low DC 
resistance. In other words, short, fat copper.  The thing it affects is 
"damping factor" -- that is, the ability of the very low Z output stage 
to damp a floppy woofer. Damping factor is, by definition, the Z of the 
loudspeaker divided by the sum of the output Z of the amplifier plus the 
resistance of the cable, and it's low frequencies we're talking about, 
so it's DCR.

There's a classic AES Paper from the '70s by E.E. Prof R. A. Greiner 
(now emeritus) who was at Univ of Wis at Madison showing conclusively 
that exotic loudspeaker cables are a complete waste of money, and the 
only thing that matters for real world loudspeakers is low DC 
resistance. In other words, short, fat copper.

The thing it affects is "damping factor" -- that is, the ability of the 
very low Z output stage to damp a floppy woofer. Damping factor is, by 
definition, the Z of the loudspeaker divided by the sum of the output Z 
of the amplifier plus the resistance of the cable, and it's low 
frequencies we're talking about, so it's DCR.

The laws of physics have not changed since the '70s. :)

73, Jim K9YC