[Elecraft] K3 Receiver mush

[Irma Linas]

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