[Elecraft] K2 On the Way -- Planning for Mods?

[Mike Lyness, AF4LQ]

It (the T2 mod/application note) dealt with winding T2's primary correctly. Below is
pasted the Apllication Note that I saved when I was building mine.....there was a
picture (guess it's still on the Elecraft site) of a corrrectly wound T2, not included
here:

--------------paste--------------------
Elecraft K2 Application Note

Winding T2 for Maximum Power Output on 12/10M

 by Gary Surrency, AB7MY  ( gary@elecraft.com )

For highest output on 10m/12m, it is especially important to wind T2's primary with
80-85 % of the core covered, and the secondary well spaced around the core as much as
possible. Bring the secondary leads down and under the core, and then route them back
to the # 3&4 pads. This allows the leads to come off of the core further apart on the
core, and makes for easier connection without having the sec. leads come off the core
too close together. The slightly longer lead length of T2's secondary when wound this
way is not significant.

It also helps to slightly space this transformer about 1/16" off of the PCB surface to
minimize any losses that may reduce the output on 10m/12m.
-----------------------------------------
73, Mike
AF4LQ


----- Original Message -----
From: "Ron D' Eau Claire" <rondec@easystreet.com>
>
> Anyway, the Mod was just that: making sure that T2 was NOT flat against the
> PCB to avoid the slight loss of drive that could cause some K2's not to make
> 10 watts on 10 meters.

> Ron AC7AC
> K2 # 1289
>