[Elecraft] K3 KPA3 bias adjust

[Bob McGraw K4TAX]

When one starts tinkering with the bias not only should they look at 
current value but also at the IMD products while using a spectrum 
analyzer.  One can  tweak the values of IMD down by having the correct 
value of bias for each device.  They will all be slightly different.  
Just because the devices have the same device number and production lot 
number does not mean the forward conductivity is the same nor will the 
IMD be lowest at a given value of current.

My experience is that ~500 to ~600 ma per device is only a starting 
point.    Perhaps this is why Elecraft does not want the procedure made 
available.

There's two kind of folks;   Those that know what they are 
doing........and those that think they know what they are doing. So 
which group are you in?

73

Bob, K4TAX