[Elecraft] K2: Does QRP-Mod (T4-winding) influence linearity of PA?

[Don Wilhelm]

Thomas,
Winding T4 for low power will cause linearity to suffer.  I don't have the
exact reference, but it did come straight from Elecraft a while back.

If you are planning the SSB option, wind T4 for the 10 watt level.
In any case, winding T4 for low power will not prevent operation at higher
power levels - it maximizes the effeciency at 5 watts therefore, when used
at higher power levels the K2 will be less efficient.

73,
Don Wilhelm  - Wake Forest, NC   W3FPR home page: http://www.qsl.net/w3fpr/
  QRP-L # 485   K2  SN 0020   mailto: w3fpr@arrl.net

----- Original Message ----- > Hello,
> I am in doubt if I should wind T4 as recommended for low
> power output levels (less than 5 Watts) because this
> will be the level I'll work with.
>
> Planning to build the SSB-Option the rig will not be a
> CW-only one and I would rather accept less efficiency than
> less linearity.
>
> So does the 2:2 winding of T4 reduce linearity?