[Elecraft] K3 Receiver mush

[W0MU Mike Fatchett]

What happens when you turn the AGC off and ride the rf gain?  Do these 
setting still have some effect or should they be set up differently?

I assume when you use 12/8/soft most people are using AGC-F?


On 2/22/2017 1:54 PM, Irma Linas wrote:
> Hi everybody,
>
> Following the advice in one of the posts here, I have changed the AGC
> settings on my K3+ ( new sync and IO boards as per Elecraft mods kit
> turning the old K3 actually into K3S). I've put the AGC THR to 12, AGS SLP
> to 8, AGC DCY to SOFT in the Config menu.
> Whaw! The efffect was immediate ,very obvious and pleasant! The strong
> signals were strong, the weak were weak , but there was no pile-up mush!
> What was especially of great importance for me - the long time annoying
> problem of receiver hiss and humm when receiving on narrow band 250 Hz
> filter was gone! Before, when switching the narrow filter on on weak
> signals on the noisy band the signal actually was totally covered by the
> increased noise in the filter. I think now it was due to the AGC reacting
> to the noise and amplifying it in the narrow band mode because of the too
> low AGC THR setting. When the threashhold was increased, the AGC stopped
> equalizing the noise and only work on the signal. The result was awsome!
> You switch the 250 hz roofing filter on and all the noise and interfering
> stns are gone, and the signal you want is there! It could be a very loud
> one or a weak one , but it is there and the noise is not!
> I recommend everybody to try out this and experiment with the AGC settings
> on your K3 radios!
> 73 de Linas LY2H
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