[Elecraft] [K3] K3 2-tone IMD test.

[Chuck - AE4CW]

Alex,

Can you please be specific about which HW mods you installed?  Are they all
published by Elecraft?  I don't recall any 1st and 2nd Mixer mods being
published.  If not, can you please share them?

Are the software mods in the current beta FW, i.e. 3.30?

Thanks.

Chuck, AE4CW



Alexander Ponomarenko-5 wrote:
> 
> Today we finished our K3 IMD-test in our home-laboratory. :)
> We has the nice results I think.
> Same improvements we have after modifications in hardware (mods for 1st 
> and 2nd Mixer, IF-buffer and AF-amplifier).
> Same improvements we have after excellent software "AGC-mods" from Lyle 
> Johnson.
> And here is the nice result in total.
> 
> 2-tone-IMD-Plot for K3/100F BEFORE mods:
> http://forum.cqham.ru/download.php?id=48688
> here we can see very dirty and nonlinear signal
> 
> Plot for K3/100F AFTER hardware mods:
> http://forum.cqham.ru/download.php?id=48689
> more clean and linear signal
> 
> Plot for K3/100F AFTER hardware mods AND new AGC:
> http://forum.cqham.ru/download.php?id=48677
> and nice result in total.
> 
> GL! 73!
> Alex UR5LAM
> 
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