[Elecraft] K2 10W PA problem

[Guido Tedeschi]

A friend asked to me to repair his K2 10W which has a strange problem:
too high current in TX (1.2A even with 0.5W) and current that
increases during key-down until HiCurr protection.
Already changed the 2 x 2SC1969 PA transistors and re-winded the
output transformer, but nothing changed: the voltages on PA and driver
seem OK, the power from driver and the power output remain stable
during key-down, but the current increases...
What could be the issue?
Before spending more time on troubleshooting, has someone had and
solved the same problem?
Thanks and 73
Guido, ik2bcp