[Elecraft] Regarding the K3 and high QRN levels

Don Wilhelm w3fpr at embarqmail.com
Fri Jul 9 17:18:47 EDT 2010


Jim,

"Riding the RF Gain" is not necessary in the K3 nor any other modern 
receiver.
However, reducing the RF Gain to the point where the noise level on the 
band is reduced to a tolerable level helps a lot with operator comfort 
while tuning.  Yes, switch to another band or another antenna and that 
optimum setting will be different.  AGC does not discriminate between a 
bunch of signals on a band and the atmospheric noise that is coming in 
from the antenna.

73,
Don W3FPR

Jan Erik Holm wrote:
> Hmmm...that must be AGC, AFAIK my K3 does have AGC and it works!
> "Riding the RF" was done back in the 50´ties.
>
> Ahmmmmm, you don´t mean to tell me that "riding the RF" is needed
> on a "super duper 2000 century CPU DSP whiz bang" design?
> If so we aren´t doing any progress here, by golly we are walking
> backwards
>
> Jim SM2EKM
>   
>


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