[Elecraft] K3/100 input voltage and TX IMD

[Bill Johnson]

I thought as HAMs we would know how to operate a rig within specs and not
rely on manufacturing.  I have been an amateur for 49 years and I learned
early on that is was my responsibility to know how to operate and control my
own signals regardless of rigs.  That is why we learn theory.  We have a mic
gain control... just turn up your mic gain beyond its recommended settings
and splatter all over the band... there's no difference than operating at
120 watts for a rig that is designed to operate at 100.  (Do we buy an amp
capable of 2500 w and operate it there?  I hope not.)  Besides, what good is
it to run at 120 watts anyway?  No noticeable difference at the receiving
end.  Let me control my rig, not Elecraft. 

73,

Bill
K9YEQ
K2 #35; KX1 #35; K3 #1744; mini mods


-----Original Message-----

>
> Why should I expect a transmitter specified for 100 watts to operate 
> within its other specs at 120 watts?  I don't because that is 
> unreasonable!  Trying to squeeze the last drop of power from a 
> transmitter has long been known to create splatter and distortion 
> products.  Please don't do that.
>   
This was what I was saying in my post the other day Don.  If the rig 
does not have good IMD over 100W and Elecraft say we should not run it 
over 100W, why does the radio allow me to turn it up?  IMHO, the power 
level on SSB should stop at 100W.  It is fine probably on CW to run 120W 
but on SSB and possibly datamodes, it should stop at 100W.  It is only 
software.

73 Ian
> 73,
> Don W3FPR
>
> Jan Erik Holm wrote:
>   
>> Rick, and others
>> Then I did bring K3 home to a PS that had 13.9V RX and
>> 13.5V at TX, didn´t reflect much about this. I then started
>> to measure IMD on the K3 and it didn´t look all that
>> bad up to 80W but at 120W it was much worse.


-- 

Ian J Maude, G0VGS
SysOp GB7MBC DX Cluster
Member RSGB, GQRP, FISTS
K2 #4044 |K3 #455